The Experts below are selected from a list of 141 Experts worldwide ranked by ideXlab platform
Pengfei Duan - One of the best experts on this subject based on the ideXlab platform.
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long persistent circularly polarized phosphorescence from chiral organic Ionic Crystals
Chemistry: A European Journal, 2018Co-Authors: Wenjie Chen, Zimin Tian, Yuqian Jiang, Minghua Liu, Pengfei DuanAbstract:Long-persistent circularly polarized phosphorescence (LPCPP) is achieved for the first time in chiral organic Ionic Crystals at room temperature. The co-crystal composed of terephtalic acid (TPA) and chiral α-phenylethyamines (PEAs) gave rise to LPCPP with lifetimes up to 862 ms and large dissymmetric factor (glum ). The hybridization of TPA with chiral PEAs allows circular polarization of the generated long-persistent phosphorescence. The observed mirror-image twisted molecular structures in the rigid lattices were responsible for the chiroptical activation of the generated long-persistent phosphorescence.
Sayaka Uchida - One of the best experts on this subject based on the ideXlab platform.
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Porous Ionic Crystals Based on Polyoxometalates
Polyoxometalate-Based Assemblies and Functional Materials, 2017Co-Authors: Sayaka UchidaAbstract:The properties of porous Ionic Crystals based on polyoxometalate (POM) anions, which are different from conventional porous crystalline materials such as zeolites and metal-organic frameworks (MOFs), can be summarized as follows: (a) POMs show reversible redox properties, which can lead to the formation of “redox-active” porous Ionic Crystals. (b) Specific functions such as guest binding and catalytically active sites can be incorporated beforehand into the Ionic components, and these functions can be maintained and utilized after complexation of the Ionic components since they still exist as discrete molecules in the crystal lattice. (c) The Ionic components create strong electrostatic fields at internal surfaces, which are suitable for accommodation and stabilization of polar guests and catIonic intermediates. (d) Since Coulomb interaction works isotropically in a long range, the crystal structures are often flexible and can transform to adapt to specific guests. Crystal structures of porous Ionic Crystals can be controlled by the appropriate choice of elements, charges, sizes, symmetry, or ligands of the Ionic components. These properties and control of structural features lead to interesting functions in gas adsorption/separation, ion-exchange and conduction, heterogeneous catalysis, reduction-induced highly selective ion uptake, etc., which are unique to porous Ionic Crystals.
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Design and syntheses of nano-structured Ionic Crystals with selective sorption properties
Coordination Chemistry Reviews, 2007Co-Authors: Sayaka Uchida, Noritaka MizunoAbstract:Abstract This review describes the design and syntheses of nano-structured Ionic Crystals with selective sorption properties. The complexation of Keggin-type polyoxometalates of [α-XW12O40]n− (n = 3–6) with a macrocation of [Cr3O(OOCH)6(H2O)3]+ and alkali metal ions forms Ionic Crystals with hydrophilic channels. The Ionic Crystals can recognize small polar molecules such as alcohols, nitriles, and esters by the difference of one methylene chain. On the other hand, the use of a macrocation of [Cr3O(OOCC2H5)6(H2O)3]+ forms both hydrophilic and hydrophobic channels in the Ionic Crystals, and the channel-selective sorption and collection of hydrophilic and hydrophobic molecules has been successfully carried out.
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Structures and Sorption Properties of Ionic Crystals of Polyoxometalates with Macrocation
Chemistry Letters, 2006Co-Authors: Noritaka Mizuno, Sayaka UchidaAbstract:Polyoxometalates are nanosized metal–oxygen macroanions and suitable building blocks of Ionic Crystals with nanostructures in combination with appropriate macrocations. In this review, (1) formatio...
Noritaka Mizuno - One of the best experts on this subject based on the ideXlab platform.
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Design and syntheses of nano-structured Ionic Crystals with selective sorption properties
Coordination Chemistry Reviews, 2007Co-Authors: Sayaka Uchida, Noritaka MizunoAbstract:Abstract This review describes the design and syntheses of nano-structured Ionic Crystals with selective sorption properties. The complexation of Keggin-type polyoxometalates of [α-XW12O40]n− (n = 3–6) with a macrocation of [Cr3O(OOCH)6(H2O)3]+ and alkali metal ions forms Ionic Crystals with hydrophilic channels. The Ionic Crystals can recognize small polar molecules such as alcohols, nitriles, and esters by the difference of one methylene chain. On the other hand, the use of a macrocation of [Cr3O(OOCC2H5)6(H2O)3]+ forms both hydrophilic and hydrophobic channels in the Ionic Crystals, and the channel-selective sorption and collection of hydrophilic and hydrophobic molecules has been successfully carried out.
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Structures and Sorption Properties of Ionic Crystals of Polyoxometalates with Macrocation
Chemistry Letters, 2006Co-Authors: Noritaka Mizuno, Sayaka UchidaAbstract:Polyoxometalates are nanosized metal–oxygen macroanions and suitable building blocks of Ionic Crystals with nanostructures in combination with appropriate macrocations. In this review, (1) formatio...
Wenjie Chen - One of the best experts on this subject based on the ideXlab platform.
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long persistent circularly polarized phosphorescence from chiral organic Ionic Crystals
Chemistry: A European Journal, 2018Co-Authors: Wenjie Chen, Zimin Tian, Yuqian Jiang, Minghua Liu, Pengfei DuanAbstract:Long-persistent circularly polarized phosphorescence (LPCPP) is achieved for the first time in chiral organic Ionic Crystals at room temperature. The co-crystal composed of terephtalic acid (TPA) and chiral α-phenylethyamines (PEAs) gave rise to LPCPP with lifetimes up to 862 ms and large dissymmetric factor (glum ). The hybridization of TPA with chiral PEAs allows circular polarization of the generated long-persistent phosphorescence. The observed mirror-image twisted molecular structures in the rigid lattices were responsible for the chiroptical activation of the generated long-persistent phosphorescence.
Zhijian Wu - One of the best experts on this subject based on the ideXlab platform.
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Lattice energy estimation for inorganic Ionic Crystals
Inorganic Chemistry, 2003Co-Authors: Siyuan Zhang, Zhijian WuAbstract:An empirical method based on chemical bond theory for the estimation of the lattice energy for Ionic Crystals has been proposed. The lattice energy contributions have been partitioned into bond dependent terms. For an individual bond, the lattice energy contribution made by it has been separated into Ionic and covalent parts. Our calculated values of lattice energies agree well with available experimental and theoretical values for diverse Ionic Crystals. This method, which requires detailed crystallographic information and elaborate computation, might be extended and possibly yield further insights with respect to bond properties of materials.
