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Keywords:

  • Pentaborate;
  • Crystal structure;
  • Hydrothermal;
  • Luminescence

Abstract

The templated borate, [C9H14N]·[B5O6(OH)4], was synthesized under hydrothermal conditions. Single crystal X-ray diffraction techonology reveals that it crystallizes in the triclinic system, space group Pequation image (No. 2). The material was also characterized by element analysis, Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), thermogravimetric and differential thermal analysis (TG-DTA), and luminescence spectroscopy. The compound consisted of isolated pentaborate [B5O6(OH)4] and N-butylpyridinium cations [C9H14N]+. The [B5O6(OH)4] anions are connected together by hydrogen bonds to form a three-dimensional framework, in which [C9H14N]+ cations are located in. [C9H14N]·[B5O6(OH)4] exhibits tunable luminescence emission at 415–458 nm by means of heating treatment from 100 to 300 °C.