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Borosilicate-Based Framework: Synthesis, Single-Crystal Structure Study, and Physical Properties
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DOI：10.1021/acs.inorgchem.3c03964.png)
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摘要
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Herein, we report the synthesis, crystal structure, and optical properties of a metal-free three-dimensional (3D) inorganic covalent framework ((H(2)en)-[Si-(B4O9)], named CityU-11, where H(2)en is the abbreviation for ethanediamine). With the assistance of a tiny amount of F- ions and the selection of SiO2 as Si sources, single crystals of CityU-11 can be successfully prepared under solvothermal conditions. The precise structure information on CityU-11 has been disclosed through both single-crystal X-ray diffraction (SCXRD) and low-dose high-resolution transmission electron microscopy (LD-HRTEM). The SCXRD results showed that CityU-11 crystallized in the noncentrosymmetric space group of Pnn2, while LD-HRTEM suggested that CityU-11 possessed almost the same interplanar distances of 0.6 nm for both (200) and (020) crystal planes, which finely matched with the double peaks of 2 theta = 15 degrees in the pattern of its powder X-ray diffraction (PXRD). CityU-11 also displayed an interesting optical property with a moderate birefringence of 0.0258@550 nm.
Keyword:
2D ZEOLITE
BOROGERMANATE
DEHYDROGENATION
GENERATION
DEPOSITION
SITES
OXIDE
UNIT
期刊
IF:
4.7
论文数:
4.9W
被引数:
10.5W
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