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JOURNAL OF SYNTHETIC CRYSTALS ›› 2022, Vol. 51 ›› Issue (3): 485-492.

• Research Articles • Previous Articles     Next Articles

Two Supra Molecular Co(Ⅱ) Coordination Polymers Based on 2,5-Dimethoxyterephthalic Acid and Imidazole Derivatives: Crystal Structures and Photo-Catalytic Reactions

SHI Mingfeng, GU Jianghong, LU Senyuan, XU Zhongxuan   

  1. School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi 563002,China
  • Received:2021-11-26 Online:2022-03-15 Published:2022-04-11

Abstract: Two cobalt coordination polymers, namely{[Co(DTA) (1,4-DIB)(H2O)]·H2O}n (1) and [Co(DTA)(1,3-BMIB)]n(2) were constructed by 2,5-dimethoxyterephthalic acid (H2DTA), Co(Ⅱ) ions and different imidazole derivatives 1,4-di(1H-imidazol-1-yl)benzene (1,4-DIB) and 1,3-bis(4-methyl-1H- imidazol-1-yl)benzene (1,3-BMIB) under hydrothermal reaction, respectively. Complexes 1 and 2 were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, thermo-gravimetric analysis and UV-Vis spectra. Single-crystal X-ray diffraction reveals that complexes 1 and 2 are three-dimensional supra molecular frameworks packed by two-dimensional layers. The powder X-ray diffraction confirms that complexes 1 and 2 are stable in water under UV light. The UV-Vis spectra indicate that complexes 1 and 2 are semiconductors with high absorbing ability for UV-Vis light. Photocatalytic tests further confirm the complex 1 and 2 have catalytic activity for the degradation of methylene blue (MB) in water.

Key words: Co(Ⅱ)-complex, three-dimensional supra-molecular structure, photo-catalytic activity, degradation, 2,5-dimethoxyterephthalic acid, imidazole derivative

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