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JOURNAL OF SYNTHETIC CRYSTALS ›› 2021, Vol. 50 ›› Issue (2): 331-337.

• Research Articles • Previous Articles     Next Articles

Synthesis and Crystal Structure of Mono-, Binuclear Copper(Ⅱ) Ternary Complexes Based on 5-Sulfosalicylic Acid

YANG Lining, CHENG Zhao, MIAO Yanqing, LIANG Lingling   

  1. Department of Pharmacy, Medical University of Xi’an, Xi’an 710021, China
  • Received:2020-11-03 Published:2021-03-24

Abstract: Mono- and binuclear structure of ternary complexes of Cu(Ⅱ):[Cu(H2biim)(Hssal) (H2O)2]·H2O(1) and {[Cu(MeHbiim)(Hssal)(H2O)]·0.5H2O}2 (2) (H3ssal=5-sulfonylsalicylic acid, H2biim=2,2′-diimidazole, MeHbiim=N-methyl-2,2′-diimidazole) were synthesized using 5-sulfosalicylic acid and imidazole derivatives as the ligands. The structures were characterized by elemental analysis, IR, UV-Vis, single crystal X-ray diffraction and TG analysis. X-ray crystallographic studies show that complex 1 belongs to monoclinic, P21/C space group. Each Cu (Ⅱ) ion is coordinated with one 5-sulfosalicylic acid anion, two water molecules and one biimidazole molecule to form five-coordinated mononuclear structural unit of distorted square pyramidal configuration. Binuclear Cu(II) complex 2 exhibits orthorhombic, P2(1)2(1)2(1) space group. One Cu(II) ion of binuclear structural unit is five-coordinated with geometry of square pyramid same as complex 1 and another Cu(II) ion is four-coordinated with geometry of quadrilateral plane. Compared to complex 1, 5-sulfonyl salicylic acid anion acted as a μ2 bis-monodentate bridging ligand in complex 2. The fluorescence spectrum analysis shows that the complex 2 has good fluorescence property.

Key words: Cu(Ⅱ) complex, 5-sulfosalicylic acid, biimidazole, crystal structure, fluorescence property, bis-monodentate

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