Anion-tuned self-assembly of zinc(II)–fluconazole complexes: Crystal structures, luminescent and thermal properties
作者:Lei Zhang、Yun Ling、Feng Peng、Miao Du
DOI:10.1016/j.molstruc.2006.06.028
日期:2007.3
Four novel fluconazole-bridged Zn(II) complexes, [Zn(Flu)Cl-2(DMF)](2) (1), [Zn(HFlu)(2)(H2O)(2)](NO3)(2)center dot 2DMF}(n) (2), [Zn(HFlu)(2)(H2O)(2)](NO3)(2)}(n) (3) and [Zn(HFlu)(SCN)(2)]center dot H2O}(n) (4) [HFlu = 2-(2,4-difluorophenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol], have been synthesized and structurally characterized by X-ray diffraction method. The structure of dimeric complex 1 consists of 20-membered macrometallacyclic ring-like structure, in which the Zn(II) ion is in a five-coordinated distorted trigonal bipyramidal geometry with the (ZnZn)-Zn-... distance of 10.265(3) angstrom across the cis HFlu ligand. Complex 2 shows infinite 1-D macrocyclic double chain structure with the central Zn(11) ions being six-coordinated by four HFlu ligands and two apical water molecules and with the intrachain (ZnZn)-Zn-... distance of 10.722(3) angstrom across the trans HFlu ligand. The crystal structure of complex 3 is analogous to that of complex 2 with the intrachain (ZnZn)-Zn-... distance of 10.654(2) angstrom. The structure of complex 4 consists of infinite 1-D coordination polymeric chain with the tetrahedral coordination geometry of Zn(II) ion and with the intrachain (ZnZn)-Zn-... distance of 11.173(2) angstrom across the cis HFlu ligand. Complexes 1-4 show the similar fluorescence emission to the free HFlu ligand at ambient temperature and the thermal stabilities of the complexes have also been investigated. (c) 2006 Elsevier B.V. All rights reserved.