Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (3): 744-749.doi: 10.1007/s40242-022-1473-7

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Two New Borates Built by Different Types of {B9} Cluster Units

CHEN Juan, WANG Jiajia, CHEN Chongan and YANG Guoyu   

  1. Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China
  • Received:2021-11-26 Revised:2021-12-27 Online:2022-06-01 Published:2022-05-26
  • Contact: YANG Guoyu E-mail:ygy@bit.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(Nos.21831001, 21571016, 91122028) and the National Natural Science Foundation of China for Distinguished Young Scholars(No.20725101).

Abstract: Two new belt-like borates Na4[B9O14(OH)3]·0.5H2O(1) and Na5[B9O14(OH)4](2) have been synthesized under solvothermal conditions. Both compounds contain unprecedented B9O16(OH)n(n+5)-[n=3(1), 4(2)] clusters, which are constructed from four B3O3 rings via three BO4 tetrahedra. Compound 1 exhibits a rare 1D belt with two types of 8-membered ring(MR) windows based on B9O16(OH)38- clusters. Compound 2 features two different 1D belts built by different B9O16(OH)49- units, which is first discovered in borate family. UV-Vis diffuse reflectance spectra reveal that compounds 1 and 2 have the cut-off edges below 190 nm, indicating that they may have potential application in deep UV(DUV) region.

Key words: Oxoboron cluster, Synthesis, Borate, Supramolecular framework, Structure