Single Crystalline,Non-stoichiometric Cocrystals of Hydrogen-Bonded Organic Frameworks |
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Authors: | Taito Hashimoto Dr Ryusei Oketani Masaki Nobuoka Prof Dr Shu Seki Prof Dr Ichiro Hisaki |
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Institution: | 1. Division of Chemistry, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560–8531 Japan;2. Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 Japan |
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Abstract: | Porous frameworks composed of non-stoichiometrically mixed multicomponent molecules attract much attention from a functional viewpoint. However, their designed preparation and precise structural characterization remain challenging. Herein, we demonstrate that cocrystallization of tetrakis(4-carboxyphenyl)hexahydropyrene and pyrene derivatives ( CP-Hp and CP-Py , respectively) yields non-stoichiometric mixed frameworks through networking via hydrogen bonding. The composition ratio of CP-Hp and CP-Py in the framework was determined by single crystalline X-ray crystallographic analysis, indicating that the mixed frameworks were formed over a wide range of composition ratios. Furthermore, microscopic Raman spectroscopy on the single crystal indicates that the components are not uniformly distributed such as ideal solid solution, but are done gradationally or inhomogeneously. |
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Keywords: | Cocrystal Crystal Engineering Hydrogen-Bonded Framework Reticular Chemistry Solid Solution |
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