The Experts below are selected from a list of 12399 Experts worldwide ranked by ideXlab platform
Mingming Zhang - One of the best experts on this subject based on the ideXlab platform.
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fluorescent metallacage core Supramolecular Polymer gel formed by orthogonal metal coordination and host guest interactions
Journal of the American Chemical Society, 2018Co-Authors: Xuzhou Yan, Mingming Zhang, Shouchun Yin, Danting Tang, Zeyuan Zhang, Zhixuan Zhou, Bo Song, Heng WangAbstract:Herein, we report the preparation of a multifunctional metallacage-core Supramolecular gel by orthogonal metal coordination and host–guest interactions. A tetragonal prismatic cage with four appended 21-crown-7 (21C7) moieties in its pillar parts was first prepared via the metal-coordination-driven self-assembly of cis-Pt(PEt3)2(OTf)2, tetraphenylethene (TPE)-based sodium benzoate ligands and linear dipyridyl ligands. Further addition of a bisammonium linker to the cage delivered a Supramolecular Polymer network via the host–guest interactions between the 21C7 moieties and ammonium salts, which formed a Supramolecular gel at relatively higher concentrations. Due to the incorporation of a TPE derivative as the fluorophore, the gel shows emission properties. Multiple stimuli responsiveness and good self-healing properties were also observed because of the dynamic metal coordination and host–guest interactions used to stabilize the whole network structure. Moreover, the storage and loss moduli of the gel are...
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a fluorescent Supramolecular Polymer with aggregation induced emission aie properties formed by crown ether based host guest interactions
Polymer Chemistry, 2015Co-Authors: Dong Chen, Jiayi Zhan, Mingming Zhang, Jing Zhang, Jiaju Tao, Danting Tang, Ailin Shen, Huayu Qiu, Shouchun YinAbstract:A fluorescent Supramolecular Polymer with aggregation induced emission properties formed by crown ether-based host–guest interactions was prepared. It can be used as a fluorescent sensor for Pd2+ ions.
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a multiple responsive self healing Supramolecular Polymer gel network based on multiple orthogonal interactions
Macromolecular Rapid Communications, 2014Co-Authors: Jiayi Zhan, Mingming Zhang, Mi Zhou, Dong Chen, Qianqian ChenAbstract:Supramolecular Polymer networks have attracted considerable attention not only due to their topological importance but also because they can show some fantastic properties such as stimuli-responsiveness and self-healing. Although various Supramolecular networks are constructed by Supramolecular chemists based on different non-covalent interactions, Supramolecular Polymer networks based on multiple orthogonal interactions are still rare. Here, a Supramolecular Polymer network is presented on the basis of the host–guest interactions between dibenzo-24-crown-8 (DB24C8) and dibenzylammonium salts (DBAS), the metal– ligand coordination interactions between terpyridine and Zn(OTf) 2 , and between 1,2,3-triazole and PdCl 2 (PhCN) 2 . The topology of the networks can be easily tuned from monomer to main-chain Supramolecular Polymer and then to the Supramolecular networks. This process is well studied by various characterization methods such as 1 H NMR, UV–vis, DOSY, viscosity, and rheological measurements. More importantly, a Supramolecular gel is obtained at high concentrations of the Supramolecular networks, which demonstrates both stimuliresponsiveness and self-healing properties.
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A self-healing Supramolecular Polymer gel with stimuli-responsiveness constructed by crown ether based molecular recognition
Polymer Chemistry, 2013Co-Authors: Xuzhou Yan, Jian-hao Chen, Bingjie Hu, Donghua Xu, Mingming Zhang, Yihua YuAbstract:A cross-linked Supramolecular Polymer network gel was prepared by orthogonal self-assembly of two homoditopic monomers and a metallic cross-linker. The gel is transparent and free-standing, which not only shows an interesting gel-sol transition in response to quadruple-stimuli, but also exhibits self-healing properties, as can be seen by the naked eye and as evidenced by rheological characterization. These unique features are all due to the dynamically reversible host-guest complexation and good mechanical properties of the cross-linked Polymer network. Therefore, these fascinating properties make this Supramolecular gel an unprecedentedly intelligent material.
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a Supramolecular Polymer blend containing two different Supramolecular Polymers through self sorting organization of two heteroditopic monomers
Chemistry: A European Journal, 2012Co-Authors: Shengyi Dong, Xuzhou Yan, Mingming Zhang, Jianzhuang Chen, Xia Ding, Bo Zheng, Feihe HuangAbstract:The creation of complex and highly-ordered structures with desired properties and novel functions has been fundamental to Supramolecular chemistry and material science, and plays an essential role in high-tech and biorelated fields, such as drug delivery systems, molecular devices and photovoltaic applications. Nature, as the best example of precise and efficient self-assembly processes, promotes chemists to engage in developing highly-ordered artificial Supramolecular assemblies, such as Supramolecular Polymers through the utilization of noncovalent interactions. Held together by reversible and highly dimensional interactions, such as host–guest interactions, hydrogen bonds, and metal coordination, Supramolecular Polymers have become one of the most active frontiers in the past two decades and have received a great deal of attention. Compared with conventional Polymers, Supramolecular Polymers typically show many dynamic or precisely controllable properties arising from dynamic linking between the constituent monomers and have the ability to respond to their environment as adaptive materials. The interest in Supramolecular Polymers has expanded in recent years, not only for their potential properties as functional materials, but also for their intriguing architectures and topologies that act as a basic aspect of potential applications. The simple blending of different Polymers has produced new Polymer blend materials with controllable and unique properties. Polymer blends have been widely studied in Polymer chemistry and materials science, and as such Supramolecular Polymer blends, defined as mixtures of two or more different and mutually exclusive Supramolecular Polymers, are an attractive topic. There are beautiful examples of miscible Polymer blends based on either multiple hydrogen-bonding, p-stacking, carboxy–amine interactions, or crown ether functionlized Polymers with ammoniumor paraquat-functionalized Polymers. However, these blends were composed of high-molecular-weight, conventional covalently bonded Polymers instead of noncovalently connected Supramolecular Polymers. It is still a big challenge for chemists to design and prepare Supramolecular Polymer blends completely from low-molecularweight monomers without any conventional Polymeric backbones. Self-sorting systems, whereby different molecules or molecular aggregates can assemble themselves with corresponding recognition units, display a critical ability to efficiently distinguish between different recognition units even in a complex mixture or in a system with similar recognition units. For example, Harada et al. found that multiple noncovalent interactions including hydrophobic interactions, p– p stacking and hydrogen-bonding interactions can create a social-self-sorting system cooperatively. Crown ethers, as the first generation of Supramolecular macrocyclic hosts, have been widely used as building blocks to construct various functional assemblies with different guest molecules. Based on the differences in binding affinity and binding selectivity between two crown ethers, dibenzo[24]crown-8 (DB24C8) and bis(p-phenylene)[34]crown-10 (BPP34C10), and their complementary guest moieties, dibenzylammonium salts (DBA) and paraquat derivatives, our group has successfully prepared an alternating Supramolecular Polymer by means of the self-sorting organization of two AB-type heteroditopic monomers. It is of considerable interest to investigate whether it is possible to combine a binary system consisting of a pair of Supramolecular Polymers through a self-sorting process into a Supramolecular Polymer blend from low-molecular-weight monomers. For example, if a Supramolecular Polymer gel is blended with a linear Supramolecular Polymer, the gelation and other properties of the Supramolecular Polymer gel can be tuned. Herein we report on a Supramolecular Polymer blend, which is formed due to the self-sorting organization of two heteroditopic AB-type monomers, 1 and 2 (Scheme 1). Monomer 1 has a DB24C8 moiety and a DBA group, which are linked together by a long and flexible alkyl chain. Monomer 2 contains a BPP34C10-paraquat-based analogue and has [a] S. Dong, X. Yan, B. Zheng, J. Chen, M. Zhang, Prof. Dr. F. Huang Department of Chemistry, Zhejiang University Hangzhou, Zhejiang 310027 (P.R. China) Fax: (+86)571-87953189 E-mail : fhuang@zju.edu.cn [b] X. Ding, Prof. Dr. Y. Yu Shanghai Key Laboratory of Magnetic Resonance Department of Physics, East China Normal University Shanghai 200062 (P.R. China) [c] Dr. D. Xu Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 (P. R. China) Supporting information for this article is available on the WWW under http://dx.doi.org/10.1002/chem.201200016.
Ying-wei Yang - One of the best experts on this subject based on the ideXlab platform.
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Supramolecular assembly induced emission enhancement for efficient mercury ii detection and removal
Journal of the American Chemical Society, 2019Co-Authors: Zheng Li, Jiarui Wu, Dongmei Zhang, Yan Wang, Jie Yang, Ying-wei YangAbstract:New strategies that can simultaneously detect and remove highly toxic environmental pollutants such as heavy metal ions are still in urgent need. Herein, through Supramolecular host–guest interactions, a fluorescent Supramolecular Polymer has been facilely constructed from a newly designed [2]biphenyl-extended pillar[6]arene equipped with two thymine sites as arms (H) and a tetraphenylethylene (TPE)-bridged bis(quaternary ammonium) guest (G) with aggregation-induced emission (AIE) property. Interestingly, Supramolecular assembly-induced emission enhancement (SAIEE) could be switched on upon addition of Hg2+ into the above-mentioned Supramolecular Polymer system to generate spherical-like Supramolecular nanoparticles, due to the restriction of intramolecular rotation (RIR)-related AIE feature of G. Significantly, this Supramolecular Polymer with integrated modalities has been successfully used for real-time detection and removal of toxic heavy metal Hg2+ ions from water with quick response, high selectivit...
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Supramolecular Assembly-Induced Emission Enhancement for Efficient Mercury(II) Detection and Removal
2019Co-Authors: Dihua Dai, Dongmei Zhang, Yan Wang, Jie Yang, Chunyu Wang, Ying-wei YangAbstract:New strategies that can simultaneously detect and remove highly toxic environmental pollutants such as heavy metal ions are still in urgent need. Herein, through Supramolecular host–guest interactions, a fluorescent Supramolecular Polymer has been facilely constructed from a newly designed [2]biphenyl-extended pillar[6]arene equipped with two thymine sites as arms (H) and a tetraphenylethylene (TPE)-bridged bis(quaternary ammonium) guest (G) with aggregation-induced emission (AIE) property. Interestingly, Supramolecular assembly-induced emission enhancement (SAIEE) could be switched on upon addition of Hg2+ into the above-mentioned Supramolecular Polymer system to generate spherical-like Supramolecular nanoparticles, due to the restriction of intramolecular rotation (RIR)-related AIE feature of G. Significantly, this Supramolecular Polymer with integrated modalities has been successfully used for real-time detection and removal of toxic heavy metal Hg2+ ions from water with quick response, high selectivity, and rapid adsorption rates, which could be efficiently regenerated and recycled without any loss via a simple treatment with Na2S. The newly developed Supramolecular Polymer system combines the inherent rigid and spacious cavity of novel extended-pillarene host with the AIE characteristics of TPE-based guest, suggesting a great potential in the treatment of heavy metal pollution and environmental sustainability
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Dual-Stimuli-Responsive Fluorescent Supramolecular Polymer Based on a Diselenium-Bridged Pillar[5]arene Dimer and an AIE-Active Tetraphenylethylene Guest
Macromolecules, 2017Co-Authors: Yan Wang, Nan Song, Ming-zhe Lv, Ying-wei YangAbstract:We report a new strategy to construct a multi-stimuli-responsive fluorescent Supramolecular Polymer by the strong host–guest interactions between a diselenium bond-bridged pillar[5]arene dimer and an AIE-active tetraphenylethylene (TPE)-containing neutral guest bearing two imidazole terminal binding sites. The resulting Supramolecular Polymer shows a remarkable fluorescence emission decrease at low concentration. Significantly, the diselenium bonds introduced into the Supramolecular Polymer serve as redox-responsive building blocks. Upon addition of reductants, the Supramolecular Polymer dePolymerized owing to the cleavage of the covalent diselenium bonds in the system. On the other hand, competitive guests such as adiponitrile, which bind strongly with pillar[5]arenes, could lead the disassembly of the Polymer to oligomers without breaking any covalent bonds in the system. These two types of dePolymerization approaches can both result in the fluorescence intensity recovery of the system to a certain exte...
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Dual-Stimuli-Responsive Fluorescent Supramolecular Polymer Based on a Diselenium-Bridged Pillar[5]arene Dimer and an AIE-Active Tetraphenylethylene Guest
2017Co-Authors: Yan Wang, Nan Song, Zeng-jie Liu, Chunyu Wang, Ying-wei YangAbstract:We report a new strategy to construct a multi-stimuli-responsive fluorescent Supramolecular Polymer by the strong host–guest interactions between a diselenium bond-bridged pillar[5]arene dimer and an AIE-active tetraphenylethylene (TPE)-containing neutral guest bearing two imidazole terminal binding sites. The resulting Supramolecular Polymer shows a remarkable fluorescence emission decrease at low concentration. Significantly, the diselenium bonds introduced into the Supramolecular Polymer serve as redox-responsive building blocks. Upon addition of reductants, the Supramolecular Polymer dePolymerized owing to the cleavage of the covalent diselenium bonds in the system. On the other hand, competitive guests such as adiponitrile, which bind strongly with pillar[5]arenes, could lead the disassembly of the Polymer to oligomers without breaking any covalent bonds in the system. These two types of dePolymerization approaches can both result in the fluorescence intensity recovery of the system to a certain extent, which will hopefully enrich the methodology toward the construction of smart Supramolecular Polymeric materials with different properties
Shouchun Yin - One of the best experts on this subject based on the ideXlab platform.
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fluorescent metallacage core Supramolecular Polymer gel formed by orthogonal metal coordination and host guest interactions
Journal of the American Chemical Society, 2018Co-Authors: Xuzhou Yan, Mingming Zhang, Shouchun Yin, Danting Tang, Zeyuan Zhang, Zhixuan Zhou, Bo Song, Heng WangAbstract:Herein, we report the preparation of a multifunctional metallacage-core Supramolecular gel by orthogonal metal coordination and host–guest interactions. A tetragonal prismatic cage with four appended 21-crown-7 (21C7) moieties in its pillar parts was first prepared via the metal-coordination-driven self-assembly of cis-Pt(PEt3)2(OTf)2, tetraphenylethene (TPE)-based sodium benzoate ligands and linear dipyridyl ligands. Further addition of a bisammonium linker to the cage delivered a Supramolecular Polymer network via the host–guest interactions between the 21C7 moieties and ammonium salts, which formed a Supramolecular gel at relatively higher concentrations. Due to the incorporation of a TPE derivative as the fluorophore, the gel shows emission properties. Multiple stimuli responsiveness and good self-healing properties were also observed because of the dynamic metal coordination and host–guest interactions used to stabilize the whole network structure. Moreover, the storage and loss moduli of the gel are...
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orthogonal Supramolecular Polymer formation on highly oriented pyrolytic graphite hopg surfaces characterized by scanning probe microscopy
Langmuir, 2015Co-Authors: Yongxiang Gong, Siqi Zhang, Yanfang Geng, Chunmei Niu, Shouchun Yin, Qingdao ZengAbstract:Formation of an orthogonal Supramolecular Polymer on a highly oriented pyrolytic graphite (HOPG) surface was demonstrated for the first time by means of scanning probe microscopy (SPM). Atomic force microscopy (AFM) was employed to characterize the variation of both the thickness and the topography of the film formed from (1) monomer 1, (2) monomer 1/Zn2+, and (3) monomer 1/Zn2+/cross-linker 2, respectively. Scanning tunneling microscopy (STM) was used to monitor the self-assembly behavior of monomer 1 itself, as well as 1/Zn2+ ions binary system on graphite surface, further testifying for the formation of linear Polymer via coordination interaction at the single molecule level. These results, given by the strong surface characterization tool of SPM, confirm the formation of the orthogonal Polymer on the surface of graphite, which has great significance in regard to fabricating a complex superstructure on surfaces.
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a fluorescent Supramolecular Polymer with aggregation induced emission aie properties formed by crown ether based host guest interactions
Polymer Chemistry, 2015Co-Authors: Dong Chen, Jiayi Zhan, Mingming Zhang, Jing Zhang, Jiaju Tao, Danting Tang, Ailin Shen, Huayu Qiu, Shouchun YinAbstract:A fluorescent Supramolecular Polymer with aggregation induced emission properties formed by crown ether-based host–guest interactions was prepared. It can be used as a fluorescent sensor for Pd2+ ions.
Feihe Huang - One of the best experts on this subject based on the ideXlab platform.
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formation of linear side chain polypseudorotaxane with Supramolecular Polymer backbone through neutral halogen bonds and pillar 5 arene based host guest interactions
Chemistry: A European Journal, 2018Co-Authors: Peiren Liu, Bingbing Shi, Jiyong Liu, Huangtianzhi Zhu, Feihe HuangAbstract:Linear side-chain polypseudorotaxane with Supramolecular Polymer backbone was assembled by neutral halogen bonds (XB) and pillar[5]arene-based host-guest interactions in solution and in the solid state. The formation of the halogen-bonded Supramolecular Polymer backbone and side-chain polypseudorotaxane in solution was characterized by 1 H NMR spectroscopy, diffusion ordered NMR spectroscopy and scanning electron microscopy experiments. Furthermore, the solid-state structures of these two highly organized Supramolecular architectures were provided by single-crystal X-ray analysis.
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responsive Supramolecular Polymer metallogel constructed by orthogonal coordination driven self assembly and host guest interactions
Journal of the American Chemical Society, 2014Co-Authors: Xuzhou Yan, Yanyan Zhang, Feihe Huang, Peifa Wei, Timothy R Cook, Bryant J Pollock, Peter J StangAbstract:An emerging strategy for the fabrication of advanced Supramolecular materials is the use of hierarchical self-assembly techniques wherein multiple orthogonal interactions between molecular precursors can produce new species with attractive properties. Herein, we unify the spontaneous formation of metal–ligand bonds with the host/guest chemistry of crown ethers to deliver a 3D Supramolecular Polymer network (SPN). Specifically, we have prepared a highly directional dipyridyl donor decorated with a benzo-21-crown-7 moiety that undergoes coordination-driven self-assembly with a complementary organoplatinum acceptor to furnish hexagonal metallacycles. These hexagons subsequently Polymerize into a Supramolecular network upon the addition of a bisammonium salt due to the formation of [2]pseudorotaxane linkages between the crown ether and ammonium moieties. At high concentrations, the resulting 3D SPN becomes a gel comprising many cross-linked metallohexagons. Notably, thermo- and cation-induced gel–sol transiti...
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a novel diblock coPolymer with a Supramolecular Polymer block and a traditional Polymer block preparation controllable self assembly in water and application in controlled release
Advanced Materials, 2013Co-Authors: Shengyi Dong, Danyu Xia, Peifa Wei, Feihe HuangAbstract:A novel diblock coPolymer with a hydrophobic Supramolecular Polymer block and a hydrophilic traditional Polymer block has been prepared. Control over the chain length ratio of the two blocks is obtained by simply changing the concentration proportion of the monomer of the Supramolecular Polymer block to the traditional Polymer block in solution. When the chain length ratio of the two blocks is changed, the formation of various self-assembly morphologies is achieved.
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a Supramolecular Polymer blend containing two different Supramolecular Polymers through self sorting organization of two heteroditopic monomers
Chemistry: A European Journal, 2012Co-Authors: Shengyi Dong, Xuzhou Yan, Mingming Zhang, Jianzhuang Chen, Xia Ding, Bo Zheng, Feihe HuangAbstract:The creation of complex and highly-ordered structures with desired properties and novel functions has been fundamental to Supramolecular chemistry and material science, and plays an essential role in high-tech and biorelated fields, such as drug delivery systems, molecular devices and photovoltaic applications. Nature, as the best example of precise and efficient self-assembly processes, promotes chemists to engage in developing highly-ordered artificial Supramolecular assemblies, such as Supramolecular Polymers through the utilization of noncovalent interactions. Held together by reversible and highly dimensional interactions, such as host–guest interactions, hydrogen bonds, and metal coordination, Supramolecular Polymers have become one of the most active frontiers in the past two decades and have received a great deal of attention. Compared with conventional Polymers, Supramolecular Polymers typically show many dynamic or precisely controllable properties arising from dynamic linking between the constituent monomers and have the ability to respond to their environment as adaptive materials. The interest in Supramolecular Polymers has expanded in recent years, not only for their potential properties as functional materials, but also for their intriguing architectures and topologies that act as a basic aspect of potential applications. The simple blending of different Polymers has produced new Polymer blend materials with controllable and unique properties. Polymer blends have been widely studied in Polymer chemistry and materials science, and as such Supramolecular Polymer blends, defined as mixtures of two or more different and mutually exclusive Supramolecular Polymers, are an attractive topic. There are beautiful examples of miscible Polymer blends based on either multiple hydrogen-bonding, p-stacking, carboxy–amine interactions, or crown ether functionlized Polymers with ammoniumor paraquat-functionalized Polymers. However, these blends were composed of high-molecular-weight, conventional covalently bonded Polymers instead of noncovalently connected Supramolecular Polymers. It is still a big challenge for chemists to design and prepare Supramolecular Polymer blends completely from low-molecularweight monomers without any conventional Polymeric backbones. Self-sorting systems, whereby different molecules or molecular aggregates can assemble themselves with corresponding recognition units, display a critical ability to efficiently distinguish between different recognition units even in a complex mixture or in a system with similar recognition units. For example, Harada et al. found that multiple noncovalent interactions including hydrophobic interactions, p– p stacking and hydrogen-bonding interactions can create a social-self-sorting system cooperatively. Crown ethers, as the first generation of Supramolecular macrocyclic hosts, have been widely used as building blocks to construct various functional assemblies with different guest molecules. Based on the differences in binding affinity and binding selectivity between two crown ethers, dibenzo[24]crown-8 (DB24C8) and bis(p-phenylene)[34]crown-10 (BPP34C10), and their complementary guest moieties, dibenzylammonium salts (DBA) and paraquat derivatives, our group has successfully prepared an alternating Supramolecular Polymer by means of the self-sorting organization of two AB-type heteroditopic monomers. It is of considerable interest to investigate whether it is possible to combine a binary system consisting of a pair of Supramolecular Polymers through a self-sorting process into a Supramolecular Polymer blend from low-molecular-weight monomers. For example, if a Supramolecular Polymer gel is blended with a linear Supramolecular Polymer, the gelation and other properties of the Supramolecular Polymer gel can be tuned. Herein we report on a Supramolecular Polymer blend, which is formed due to the self-sorting organization of two heteroditopic AB-type monomers, 1 and 2 (Scheme 1). Monomer 1 has a DB24C8 moiety and a DBA group, which are linked together by a long and flexible alkyl chain. Monomer 2 contains a BPP34C10-paraquat-based analogue and has [a] S. Dong, X. Yan, B. Zheng, J. Chen, M. Zhang, Prof. Dr. F. Huang Department of Chemistry, Zhejiang University Hangzhou, Zhejiang 310027 (P.R. China) Fax: (+86)571-87953189 E-mail : fhuang@zju.edu.cn [b] X. Ding, Prof. Dr. Y. Yu Shanghai Key Laboratory of Magnetic Resonance Department of Physics, East China Normal University Shanghai 200062 (P.R. China) [c] Dr. D. Xu Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 (P. R. China) Supporting information for this article is available on the WWW under http://dx.doi.org/10.1002/chem.201200016.
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a multiresponsive shape persistent and elastic Supramolecular Polymer network gel constructed by orthogonal self assembly
Advanced Materials, 2012Co-Authors: Donghua Xu, Yihua Yu, Jianzhuang Chen, Shengyi Dong, Xia Ding, Feihe HuangAbstract:A cross-linked Supramolecular Polymer network gel is designed and prepared, which shows reversible gel-sol transitions induced by changes in pH, temperature, cation concentration, and metal co-ordination. The gel pore size is controlled by the amount of cross-linker added to the system, and the material can be molded into shape-persistent, free-standing objects with elastic behavior. These features are all due to the dynamically reversible host-guest complexation and good mechanical properties of the cross-linked Polymer network. No single organogel has previously been reported to possess all of these features, making this Supramolecular gel an unprecedentedly intelligent soft material.
Masayoshi Higuchi - One of the best experts on this subject based on the ideXlab platform.
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transparent supercapacitor display with redox active metallo Supramolecular Polymer films
ACS Applied Materials & Interfaces, 2020Co-Authors: Sanjoy Mondal, Takefumi Yoshida, Subrata Maji, Katsuhiko Ariga, Masayoshi HiguchiAbstract:The use of metallo-Supramolecular Polymer (MSP) as a thin-film-based redox supercapacitor electrode material is reported for the first time. Fe(II)- and Ru(II)-based MSPs (polyFe and polyRu, respectively) were synthesized by complexation of appropriate metal salts with 4',4″-(1,4-phenylene)bis-2,2':6',2″-terpyridine, and thin films of these Polymers were prepared by spray coating onto an indium tin oxide glass substrate. A study of the energy storage performances of the polyFe and polyRu films in a nonaqueous electrolyte system revealed volumetric capacitances of ∼62.6 ± 3 F/cm3 for polyFe and 98.5 ± 7 F/cm3 for polyRu at a current density of 2 A/cm3. To improve the energy storage performance over a wider potential range, asymmetric supercapacitor (ASC) displays were fabricated with suitable combinations of the MSPs as cathodic materials and Prussian blue as the anodic counter material in a sandwich configuration with a transparent Polymeric ion gel as the electrolyte. The fabricated ASCs showed a maximum volumetric energy density (∼10-18 mW h/cm3) that was higher than that of lithium thin-film batteries and a power density (7 W/cm3) comparable to that of conventional electrolyte capacitors, with superb cyclic stability for 10 000 cycles. To demonstrate the practical use of the MSP, the illumination of a light-emitting diode bulb was powered by a laboratory-made device. This work should inspire the development of high-performance thin-film flexible supercapacitors based on MSPs as active cathodic materials.
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thermally stable electrochromic devices using fe ii based metallo Supramolecular Polymer
Solar Energy Materials and Solar Cells, 2019Co-Authors: Sanjoy Mondal, Takefumi Yoshida, Utpal Rana, Manas Kumar Bera, Masayoshi HiguchiAbstract:Abstract A solid-state electrochromic (EC) device with high thermal durability was successfully fabricated by the combination of Fe(II)-based metallo-Supramolecular Polymer (polyFe) as a cathodically coloring EC layer, a poly(methyl methacrylate)-based solid-state electrolyte layer, and Prussian blue (PB) as an anodically coloring EC layer between two indium tin oxide (ITO)-coated glass conducting substrates. Spray coating technique was used to make polyFe film on ITO-glass. Counter materials were investigated to improve the long-term durability and performance of solid state devices. The polyFe layer thickness was optimized at 240 ± 50 nm, resulting in better electrochromic performance of the fabricated device with transmittance change of ~54% and 95% cyclic stability after 1000 cycles with a short response time by applying voltages of +2.7 V and −1.3 V reversibly. Importantly, the thermal stability of the fabricated solid device was also explored, and we achieved maximum temperature stability at 100 °C with 50% retention of device properties in this study.
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solvent effect on electrochemical properties of a co ii based metallo Supramolecular Polymer film
Macromolecular Symposia, 2016Co-Authors: Satoshi Moriyama, Masayoshi HiguchiAbstract:Summary The influence of solvents on the electrochemical properties of a Co(II)-bisterpyridine-based metallo-Supramolecular Polymer (polyCo) thin films are studied. A redox couple of the polyCo film on GC electrode is observed in the reduction domain due to the redox reaction between Co(II) and Co(I) which belongs to a Nernstian reversible process in aqueous electrolyte solution. While a significant difference on the electrochemical stability of polyCo film is found in the electrolyte solution of organic solvent. A shrinking behaviour of the film is observed after redox switching in acetonitrile solution. The formation of the mixed-ligand of cobalt ion with water molecules as well as the hydrophilic property of the anion enable a stable redox switching of polyCo film in aqueous electrolytes.
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black to transmissive electrochromism with visible to near infrared switching of a co ii based metallo Supramolecular Polymer for smart window and digital signage applications
ACS Applied Materials & Interfaces, 2015Co-Authors: Chihyu Hsu, Satoshi Moriyama, Jia Zhang, Takashi Sato, Masayoshi HiguchiAbstract:Black-to-transmissive electrochromism has been obtained with a Co(II)-based metallo-Supramolecular Polymer (polyCo). Thin films of polyCo, based on bisterpyridine ligand assembled with Co(II) metal ion, were constructed by spray casting the Polymer onto ITO glass. With such simple fabricating means to form good-quality films, polyCo films show stable switching at the central metal ion of the Co(II)/Co(I) redox reaction when immersed in aqueous solution. With an increase in the pH of the aqueous electrolyte solution from neutral, the film exhibits a color response due to the interaction between the d-orbital electron and hydroxide ions affecting the d–d* transition. As a result, a nearly transparent-to-black electrochromic performance can be achieved with a transmittance difference at 550 nm of 74.3% (81.9–7.6%) in pH 13 solution. The light absorption of the film can be tuned over light regions from visible to near-infrared with a large attenuation.
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stimuli responsive metallo Supramolecular Polymer films design synthesis and device fabrication
Journal of Materials Chemistry C, 2014Co-Authors: Masayoshi HiguchiAbstract:Metallo-Supramolecular Polymers, which were synthesized via the 1:1 complexation of metal ions with ditopic organic ligands, showed unique electro- and photo-chemical properties based on the metal–ligand or metal–metal interactions. Fe(II)-, Ru(II)- and Cu(II)-based metallo-Supramolecular Polymer films exhibited reversible electrochromic behaviour and electrochromic display devices were successfully fabricated. A Polymer containing both Fe(II) and Ru(II) ions exhibited multi-colour electrochromic properties. Ionic conductivity of a Ni(II)-based Polymer film was significantly enhanced with increasing humidity, and real-time humidity sensing was realized by utilizing the Polymer film. A Eu(III)-based Polymer showed vapoluminescence. Reversible switching of emission was achieved in the Polymer with Fe(II) and Eu(III) ions introduced in an alternating manner.
