Borosilicate-Based Framework: Synthesis, Single-Crystal Structure Study, and Physical Properties

Qiang Dong; Lei Zhang; Cailing Chen; Miaomiao Xue; Zengkui Zhu; Xiang Wang; Xin Wang; Yu Han; Xinxiong Li; Qichun Zhang

doi:10.1021/acs.inorgchem.3c03964

Borosilicate-Based Framework: Synthesis, Single-Crystal Structure Study, and Physical Properties

Inorg Chem. 2024 Feb 5;63(5):2663-2669. doi: 10.1021/acs.inorgchem.3c03964. Epub 2024 Jan 23.

Authors

Qiang Dong¹, Lei Zhang¹, Cailing Chen², Miaomiao Xue¹, Zengkui Zhu³, Xiang Wang¹, Xin Wang¹, Yu Han⁴, Xinxiong Li⁵, Qichun Zhang^{1

6}

Affiliations

¹ Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China.
² Physical Sciences and Engineering Division, Advanced Membranes and Porous Materials (AMPM) Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
³ Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
⁴ School of Emergent Soft Matter, South China University of Technology, Guangzhou 510641, P. R. China.
⁵ Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated-Materials, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China.
⁶ Department of Chemistry & Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Tat Chee Avenue 83, Kowloon, Hong Kong SAR 999077, P. R. China.

PMID: 38261761
DOI: 10.1021/acs.inorgchem.3c03964

Abstract

Herein, we report the synthesis, crystal structure, and optical properties of a metal-free three-dimensional (3D) inorganic covalent framework ((H₂en)[Si(B₄O₉)], named CityU-11, where H₂en 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 2θ = 15° 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.