Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (1): 86-90.doi: 10.1007/s40242-020-9097-2

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Two New Alkaline Metal Borates with Supramolecular Framework Constructed from 1D {B5}/{B6} Helical Chains

QIU Qiming, SUN Kening, YANG Guoyu   

  1. Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
  • Received:2019-12-12 Revised:2020-01-08 Online:2020-02-01 Published:2020-01-09
  • Contact: YANG Guoyu E-mail:ygy@bit.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.21571016, 21831001 and 91122028) and the National Natural Science Foundation of China for Distinguished Young Scholars(No.20725101).

Abstract: Two new alkaline metal borates containing 1D {B5}/{B6} oxoboron helical chains, namely Na0.5[B5O8(OH)2]0.5[B5O6(OH)2]0.5·0.5H3O(1) and NaKCs[B6O9(OH)3](2) were synthesized under solvothermal conditions. Compound 1 contains the interesting alternative left- and right-handed helical {[B5O8(OH)2] [B5O6(OH)2]}2- ({B5}-1 and {B5}-2) 1D chains and compound 2 possesses the similar[B6O11(OH)3]7-({B6}) chains. Their 1D chains are further assembled into 2D layers and 3D supramolecular frameworks through O-H…O hydrogen bonds. In addition, the UV cutoff edge of compounds 1 and 2 is both below 190 nm.

Key words: Alkaline metal borate, Solvothermal synthesis, Helical chain, Supramolecular framework