Formation of Nanometer-Thick Water Layer at High Humidity on Dynamic Crystalline Material Composed of Multi-Interactive Molecules

Crystalline powders self-assembled from interactive discrete molecules reversibly transformed from a porous structure to a 2D one with a nanometer-thick H2O layer by hydration/dehydration. Multi-point weak intermolecular interactions contributed to maintenance of each phase. This structure transformation induced a humidity-dependent ion conductivity change from insulator to 3.4 x 10(-3) S cm(-1).open1122sciescopu

Design of a redox-active porous coordination network

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Design of rigid ligands for porous coordination networks

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Design of rigid porous coordination networks

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The Syntheses and Properties of Azaphenalene-Based Coordination Networks

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Dynamic Structure Transformation of a Porous Coordination Network Composed of New Tridentate Ligands

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Dynamic Structure Transformation of Kinetically Prepared TPHAP-Co(II) Porous Coordination Network

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Crystal surface mediated structure transformation of a kinetic framework composed of multi-interactive ligand TPHAP and Co(II)

A tripyridyl multi-interactive ligand TPHAP is prepared by a one-pot reaction on a gram scale. Network formation of Co(II) with TPHAP(-) gave kinetic and thermally more stable products. The kinetic network showed an unprecedented dynamic network transformation on the crystal surface by a ligand exchange reaction.open111013sciescopu

Partially Fluoride-Substituted Hydroxyapatite as a Suitable Support for the Gold-Catalyzed Homocoupling of Phenylboronic Acid: An Example of Interface Modification

Interface modification of hydroxyapatite-supported nanogold by fluoride ion improved the activity of the catalyst toward aerobic homocoupling of phenylboronic acid. In the aerobic homocoupling reaction of PhBF₃K catalyzed by hydroxyapatite-supported gold nanoclusters (Au:HAP), a study on the reactivity and reusability of the Au:HAP catalyst showed an unusual yield profile for the reaction. Intensive characterization of the catalyst by X-ray diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopic analysis exhibited that the structure of the metal oxide support undergoes transformation from HAP to fluorapatite (FAP) and finally to calcium fluoride (CaF₂) during the course of these cycles of homocoupling of PhBF₃K. Investigations of the interactions of Au:HAP with PhBF₃K and of the fluoride ion-induced structural changes in both the support and the AuNCs, indicating that partially fluoride-substituted HAP (F-HAP) is the optimal support for the homocoupling of PhB­(OH)₂. This is effective both as a stabilizer for AuNCs through the phosphate moiety and in activation of C–B bond transmetalation through B–F interactions. The results strongly suggest that fine-tuning of the structure of the interface between metal clusters and their support (namely, surface modification) might be important in developing chemo-selective catalysts

Sumanene-Stacked Supramolecular Polymers. Dynamic, Solvation-Directed Control

Supramolecular polymer chemistry has recently garnered considerable attention in multidisciplinary science, however, the mutual choice of supramolecular hosts and monomer units has yet to be demonstrated on a trial-and-error basis. Curved-pi-buckybowls appear to be good “seeds” for supramolecular polymers, however, the very fast bowl-to-bowl inversion in the solution hampers their wide usage. In this study, we found that a pristine buckybowl, sumanene, can form solution-state supramolecular polymers via bowl-to-bowl inversion. We also demonstrated that sumanene supramolecular polymers can be dynamically controlled by external stimuli, in which solvation plays a significant role. This study not only provides new guidelines for the rational design of supramolecular polymers, particularly for the use of buckybowls, but also presents interesting dynamic behaviors of supramolecular polymerization