The Experts below are selected from a list of 18345 Experts worldwide ranked by ideXlab platform
Ivan Biaggio - One of the best experts on this subject based on the ideXlab platform.
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A high-optical quality Supramolecular Assembly for third-order nonlinear optics
2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference, 2009Co-Authors: M L Scimeca, Bweh Esembeson, Tsuyoshi Michinobu, Ivan Biaggio, Frana Ois DiederichAbstract:We present an organic supramoleular Assembly with a high off-resonant third-order susceptibility, easy fabrication into homogeneous thin films, and high-optical quality for ultra-fast all optical data processing.
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a high optical quality Supramolecular Assembly for third order integrated nonlinear optics
Advanced Materials, 2008Co-Authors: Bweh Esembeson, M L Scimeca, Tsuyoshi Michinobu, Frana Ois Diederich, Ivan BiaggioAbstract:A high-quality organic thin film for integrated nonlinear optics is produced by molecular beam deposition of a compact molecule that has a high specific third-order polarizability. The resulting dense, homogenous, amorphous Supramolecular Assembly with a large third-order nonlinearity and high-optical quality enables novel applications in integrated nonlinear optics.
Yunqian Zhang - One of the best experts on this subject based on the ideXlab platform.
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Supramolecular Assembly of a methyl-substituted cucurbit[6]uril and its potential applications in selective sorption
New Journal of Chemistry, 2020Co-Authors: Wenxuan Zhao, Chuan-zeng Wang, Yunqian ZhangAbstract:Assembly of a methyl-substituted cucurbit[6]uril derived from 3α-methyl-glycoluril (HMeQ[6]) has been studied. A Supramolecular Assembly has been formed in aqueous HCl solution through the outer-surface interactions of HMeQ[6] molecules. This Supramolecular Assembly has a porous structure with potential for applications in the selective sorption of polar volatile organics, which may be useful in molecular sieves, sensors, absorption and separation.
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A Supramolecular Assembly of methyl-substituted cucurbit[5]uril and its potential applications in selective absorption
RSC Advances, 2020Co-Authors: Chuan-zeng Wang, Wenxuan Zhao, Yunqian ZhangAbstract:A Supramolecular Assembly of a methyl-substituted cucurbit[5]uril (SPMeQ[5]) derived from 3-α-methyl-glycoluril is formed in the presence of the organic structure-directing agent, hydroquinone (Hyq). The structure-directing effect of Hyq is not only useful in the construction of novel Supramolecular assemblies based on cucurbit[n]uril (Q[n]) and organic molecules but it could also enable the preparation of Q[n]-based porous materials for use in molecular sieves, and sensors, used in absorption and separation.
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Preparation and adsorption properties of a facile solid cucurbit[8]uril-based porous Supramolecular Assembly:
Journal of Chemical Research-s, 2019Co-Authors: Chun-chun Chen, Weiwei Ge, Kai Chen, Yunqian ZhangAbstract:Cucurbit[8]uril (Q[8]) was used as the building block for the facile preparation of Q[8]-based Supramolecular assemblies in aqueous HCl solutions (A). The Q[8]-based Supramolecular Assembly was con...
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Supramolecular Assembly of a methyl-substituted cucurbit[6]uril and its potential applications in selective sorption
New Journal of Chemistry, 2015Co-Authors: Wenxuan Zhao, Saifeng Xue, Qianjiang Zhu, Yunqian Zhang, Chao Wang, Zhu TaoAbstract:Assembly of a methyl-substituted cucurbit[6]uril derived from 3a-methyl-glycoluril (HMeQ[6]) has been studied. A Supramolecular Assembly has been formed in aqueous HCl solution through the outer-surface interactions of HMeQ[6] molecules. This Supramolecular Assembly has a porous structure with potential for applications in the selective sorption of polar volatile organics, which may be useful in molecular sieves, sensors, absorption and separation. Cucurbit[n]urils (Q[n]s) 1–5 are distinguished by rigid structures characterized by a rigid hydrophobic cavity accessible through two polar portals rimmed with carbonyl groups, and show high affinity for various metal ions and their complexes, and form various Q[n]-based host–guest Supramolecular assemblies 6–16 and coordination complexes. 17–21 Substituted Q[n]s not only show improved solubility compared to their unsubstituted counter-parts, 22–25 but also bear reactive groups, 26–31 thereby greatly extending the development of Q[n]-based chemistry. Since we developed a strategy for the controlled synthesis of partially substituted cucurbit[n]urils by using the C-shaped methylene-bridged unsubstituted glycoluril dimer in 2004, 32 a series of alkyl-substituted Q[n]s have been synthesized successively. 33–35 Along with the synthesis of Q[n]s, the cucurbit[n]uril family has proved to be highly versatile in the field of Q[n] chemistry. Of the research topics in Q[n] chemistry, Supramolecular architectures and functional materials are becoming even more important, and the functional materials undoubtedly have broad prospects. Porous materials typically comprise microporous zeolites, meso-porous silica, metal oxides, metal–organic framework (MOF) com-pounds, macroporous polymers, and so on. 36–40 Some organic molecular porous compounds have permanent porosity and high thermal and chemical stability, making them useful for gas storage and other applications, and are therefore becoming important topics of research in the realm of functional materials. 41–43 Over the past decade, Q[n]-based porous materials have received some attention. For example, Kim and co-workers demonstrated a series of such Q[n]-based Supramolecular assemblies which displayed not only novel architectures but also the unique gas sorption properties and anisotropic proton conductivity. 41–43 Recently, our group has demonstrated a series of Q[n]-based Supramolecular assemblies by using different construction strategies through the so-called outer-surface interactions of Q[n]s. 10,21 This included a typical Q[6]-based porous material obtained in the presence of the hexachloroplatinate(IV) dianion [PtCl 6 ] 2À as a structure directing agent, which showed selective sorption properties. 44 In the present work, a partially methyl-substituted cucurbituril derived from 3a-methyl-glycoluril (HMeQ[6]) 34 has been selected as a ligand, and its Supramolecular Assembly in aqueous HCl solution has been investigated. Crystallization of this supra-molecular Assembly of HMeQ[6] was found to provide stable and accessible channels. Further research has suggested that this porous Supramolecular Assembly might be used for the selective sorption of volatile alcohols, in particular, methanol. As mentioned above, Kim and co-workers demonstrated Q[6]-based Supramolecular assemblies, and claimed that these systems exhibited high thermal stability, permanent porosity, and remarkable gas sorption properties. 41,42 In the present work, we demonstrate a Supramolecular Assembly constructed entirely from HMeQ[6] molecules. The crystal structure shows that the Supramolecular Assembly has numerous channels along the c-axis (Fig. 1a). The aperture of each channel is constructed from four HMeQ[6] molecules, and has dimensions of length 8.4 Å Â width 6.8 Å along the c-axis (Fig. 1b). It should be noted that the channels are filled with a large amount of water molecules, which are omitted for clarity. We then turned our attention to identifying the driving force resulting in the formation of this HMeQ[6]-based Supramolecular Assembly. Close inspection reveals that the four HMeQ[6] molecules, that
Zhu Tao - One of the best experts on this subject based on the ideXlab platform.
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Supramolecular Assembly of a methyl-substituted cucurbit[6]uril and its potential applications in selective sorption
New Journal of Chemistry, 2015Co-Authors: Wenxuan Zhao, Saifeng Xue, Qianjiang Zhu, Yunqian Zhang, Chao Wang, Zhu TaoAbstract:Assembly of a methyl-substituted cucurbit[6]uril derived from 3a-methyl-glycoluril (HMeQ[6]) has been studied. A Supramolecular Assembly has been formed in aqueous HCl solution through the outer-surface interactions of HMeQ[6] molecules. This Supramolecular Assembly has a porous structure with potential for applications in the selective sorption of polar volatile organics, which may be useful in molecular sieves, sensors, absorption and separation. Cucurbit[n]urils (Q[n]s) 1–5 are distinguished by rigid structures characterized by a rigid hydrophobic cavity accessible through two polar portals rimmed with carbonyl groups, and show high affinity for various metal ions and their complexes, and form various Q[n]-based host–guest Supramolecular assemblies 6–16 and coordination complexes. 17–21 Substituted Q[n]s not only show improved solubility compared to their unsubstituted counter-parts, 22–25 but also bear reactive groups, 26–31 thereby greatly extending the development of Q[n]-based chemistry. Since we developed a strategy for the controlled synthesis of partially substituted cucurbit[n]urils by using the C-shaped methylene-bridged unsubstituted glycoluril dimer in 2004, 32 a series of alkyl-substituted Q[n]s have been synthesized successively. 33–35 Along with the synthesis of Q[n]s, the cucurbit[n]uril family has proved to be highly versatile in the field of Q[n] chemistry. Of the research topics in Q[n] chemistry, Supramolecular architectures and functional materials are becoming even more important, and the functional materials undoubtedly have broad prospects. Porous materials typically comprise microporous zeolites, meso-porous silica, metal oxides, metal–organic framework (MOF) com-pounds, macroporous polymers, and so on. 36–40 Some organic molecular porous compounds have permanent porosity and high thermal and chemical stability, making them useful for gas storage and other applications, and are therefore becoming important topics of research in the realm of functional materials. 41–43 Over the past decade, Q[n]-based porous materials have received some attention. For example, Kim and co-workers demonstrated a series of such Q[n]-based Supramolecular assemblies which displayed not only novel architectures but also the unique gas sorption properties and anisotropic proton conductivity. 41–43 Recently, our group has demonstrated a series of Q[n]-based Supramolecular assemblies by using different construction strategies through the so-called outer-surface interactions of Q[n]s. 10,21 This included a typical Q[6]-based porous material obtained in the presence of the hexachloroplatinate(IV) dianion [PtCl 6 ] 2À as a structure directing agent, which showed selective sorption properties. 44 In the present work, a partially methyl-substituted cucurbituril derived from 3a-methyl-glycoluril (HMeQ[6]) 34 has been selected as a ligand, and its Supramolecular Assembly in aqueous HCl solution has been investigated. Crystallization of this supra-molecular Assembly of HMeQ[6] was found to provide stable and accessible channels. Further research has suggested that this porous Supramolecular Assembly might be used for the selective sorption of volatile alcohols, in particular, methanol. As mentioned above, Kim and co-workers demonstrated Q[6]-based Supramolecular assemblies, and claimed that these systems exhibited high thermal stability, permanent porosity, and remarkable gas sorption properties. 41,42 In the present work, we demonstrate a Supramolecular Assembly constructed entirely from HMeQ[6] molecules. The crystal structure shows that the Supramolecular Assembly has numerous channels along the c-axis (Fig. 1a). The aperture of each channel is constructed from four HMeQ[6] molecules, and has dimensions of length 8.4 Å Â width 6.8 Å along the c-axis (Fig. 1b). It should be noted that the channels are filled with a large amount of water molecules, which are omitted for clarity. We then turned our attention to identifying the driving force resulting in the formation of this HMeQ[6]-based Supramolecular Assembly. Close inspection reveals that the four HMeQ[6] molecules, that
Wenxuan Zhao - One of the best experts on this subject based on the ideXlab platform.
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A Supramolecular Assembly of methyl-substituted cucurbit[5]uril and its potential applications in selective absorption
RSC Advances, 2020Co-Authors: Chuan-zeng Wang, Wenxuan Zhao, Yunqian ZhangAbstract:A Supramolecular Assembly of a methyl-substituted cucurbit[5]uril (SPMeQ[5]) derived from 3-α-methyl-glycoluril is formed in the presence of the organic structure-directing agent, hydroquinone (Hyq). The structure-directing effect of Hyq is not only useful in the construction of novel Supramolecular assemblies based on cucurbit[n]uril (Q[n]) and organic molecules but it could also enable the preparation of Q[n]-based porous materials for use in molecular sieves, and sensors, used in absorption and separation.
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Supramolecular Assembly of a methyl-substituted cucurbit[6]uril and its potential applications in selective sorption
New Journal of Chemistry, 2020Co-Authors: Wenxuan Zhao, Chuan-zeng Wang, Yunqian ZhangAbstract:Assembly of a methyl-substituted cucurbit[6]uril derived from 3α-methyl-glycoluril (HMeQ[6]) has been studied. A Supramolecular Assembly has been formed in aqueous HCl solution through the outer-surface interactions of HMeQ[6] molecules. This Supramolecular Assembly has a porous structure with potential for applications in the selective sorption of polar volatile organics, which may be useful in molecular sieves, sensors, absorption and separation.
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Supramolecular Assembly of a methyl-substituted cucurbit[6]uril and its potential applications in selective sorption
New Journal of Chemistry, 2015Co-Authors: Wenxuan Zhao, Saifeng Xue, Qianjiang Zhu, Yunqian Zhang, Chao Wang, Zhu TaoAbstract:Assembly of a methyl-substituted cucurbit[6]uril derived from 3a-methyl-glycoluril (HMeQ[6]) has been studied. A Supramolecular Assembly has been formed in aqueous HCl solution through the outer-surface interactions of HMeQ[6] molecules. This Supramolecular Assembly has a porous structure with potential for applications in the selective sorption of polar volatile organics, which may be useful in molecular sieves, sensors, absorption and separation. Cucurbit[n]urils (Q[n]s) 1–5 are distinguished by rigid structures characterized by a rigid hydrophobic cavity accessible through two polar portals rimmed with carbonyl groups, and show high affinity for various metal ions and their complexes, and form various Q[n]-based host–guest Supramolecular assemblies 6–16 and coordination complexes. 17–21 Substituted Q[n]s not only show improved solubility compared to their unsubstituted counter-parts, 22–25 but also bear reactive groups, 26–31 thereby greatly extending the development of Q[n]-based chemistry. Since we developed a strategy for the controlled synthesis of partially substituted cucurbit[n]urils by using the C-shaped methylene-bridged unsubstituted glycoluril dimer in 2004, 32 a series of alkyl-substituted Q[n]s have been synthesized successively. 33–35 Along with the synthesis of Q[n]s, the cucurbit[n]uril family has proved to be highly versatile in the field of Q[n] chemistry. Of the research topics in Q[n] chemistry, Supramolecular architectures and functional materials are becoming even more important, and the functional materials undoubtedly have broad prospects. Porous materials typically comprise microporous zeolites, meso-porous silica, metal oxides, metal–organic framework (MOF) com-pounds, macroporous polymers, and so on. 36–40 Some organic molecular porous compounds have permanent porosity and high thermal and chemical stability, making them useful for gas storage and other applications, and are therefore becoming important topics of research in the realm of functional materials. 41–43 Over the past decade, Q[n]-based porous materials have received some attention. For example, Kim and co-workers demonstrated a series of such Q[n]-based Supramolecular assemblies which displayed not only novel architectures but also the unique gas sorption properties and anisotropic proton conductivity. 41–43 Recently, our group has demonstrated a series of Q[n]-based Supramolecular assemblies by using different construction strategies through the so-called outer-surface interactions of Q[n]s. 10,21 This included a typical Q[6]-based porous material obtained in the presence of the hexachloroplatinate(IV) dianion [PtCl 6 ] 2À as a structure directing agent, which showed selective sorption properties. 44 In the present work, a partially methyl-substituted cucurbituril derived from 3a-methyl-glycoluril (HMeQ[6]) 34 has been selected as a ligand, and its Supramolecular Assembly in aqueous HCl solution has been investigated. Crystallization of this supra-molecular Assembly of HMeQ[6] was found to provide stable and accessible channels. Further research has suggested that this porous Supramolecular Assembly might be used for the selective sorption of volatile alcohols, in particular, methanol. As mentioned above, Kim and co-workers demonstrated Q[6]-based Supramolecular assemblies, and claimed that these systems exhibited high thermal stability, permanent porosity, and remarkable gas sorption properties. 41,42 In the present work, we demonstrate a Supramolecular Assembly constructed entirely from HMeQ[6] molecules. The crystal structure shows that the Supramolecular Assembly has numerous channels along the c-axis (Fig. 1a). The aperture of each channel is constructed from four HMeQ[6] molecules, and has dimensions of length 8.4 Å Â width 6.8 Å along the c-axis (Fig. 1b). It should be noted that the channels are filled with a large amount of water molecules, which are omitted for clarity. We then turned our attention to identifying the driving force resulting in the formation of this HMeQ[6]-based Supramolecular Assembly. Close inspection reveals that the four HMeQ[6] molecules, that
Bweh Esembeson - One of the best experts on this subject based on the ideXlab platform.
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A high-optical quality Supramolecular Assembly for third-order nonlinear optics
2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference, 2009Co-Authors: M L Scimeca, Bweh Esembeson, Tsuyoshi Michinobu, Ivan Biaggio, Frana Ois DiederichAbstract:We present an organic supramoleular Assembly with a high off-resonant third-order susceptibility, easy fabrication into homogeneous thin films, and high-optical quality for ultra-fast all optical data processing.
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a high optical quality Supramolecular Assembly for third order integrated nonlinear optics
Advanced Materials, 2008Co-Authors: Bweh Esembeson, M L Scimeca, Tsuyoshi Michinobu, Frana Ois Diederich, Ivan BiaggioAbstract:A high-quality organic thin film for integrated nonlinear optics is produced by molecular beam deposition of a compact molecule that has a high specific third-order polarizability. The resulting dense, homogenous, amorphous Supramolecular Assembly with a large third-order nonlinearity and high-optical quality enables novel applications in integrated nonlinear optics.
