Citation: WU Hao, CHEN Ze-Hua, YU Ya-Ping, ZHAO Ling-Ling, WU Wei-Na, WANG Yuan. Crystal Structures and Fluorescence Properties of Cu(Ⅱ)/Zn(Ⅱ) Complexes with a Semicarbazone Ligand Bearing Pyrazine Unit[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(4): 699-704. doi: 10.11862/CJIC.2017.051 shu

Crystal Structures and Fluorescence Properties of Cu(Ⅱ)/Zn(Ⅱ) Complexes with a Semicarbazone Ligand Bearing Pyrazine Unit

College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China

Corresponding author: CHEN Ze-Hua, chen1861@hpu.edu.cn WU Wei-Na, wuwn08@hpu.edu.cn
Received Date: 11 November 2016
Revised Date: 8 December 2016

Figures(3)

Two complexes, namely, [Cu₂(L)₂Br₂]·CH₃OH (1) and[Zn₂(L)₂(CH₃COO)₂]·2CH₃OH (2) (HL=1-(3-ethylpyrazin-2-yl) ethylidene-4-phenylsemicarbazide) have been synthesized and characterized by single crystal X-ray diffraction, elemental analysis and IR spectroscopy. In complex 1, the center Cu(Ⅱ) ion with a distorted square pyramid coordination geometry is coordinated by one tridentate deprotonated semicarbazone with N₂O donor set and two μ²-bridged bromide anions. The coordination geometry of the Zn(Ⅱ) ion in complex 2 is same as that of the Cu(Ⅱ) ion in complex 1, while with N₂O₃ donor set. In addition, two acetate anions in complex 2 exhibit different coordination modes, one of which is bidentate bridge (μ-OCO), while the other one is oxygen bridge (μ-O). In the methanol solution, both complexes exhibit the intra-ligand emission.
- semicarbazone,
- Cu(Ⅱ) complex,
- Zn(Ⅱ) complex,
- pyrazine,
- fluorescence
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