三苯基膦和硫醇混合配体亚铜配合物的结构表征  

Structural Characterization of Copper(Ⅰ)Complex Based on Triphenylphosphine and Thioalcohol Mixed Ligands

作　　者：闫丽 彭绍春 YAN Li;PENG Shaochun(Analysis and Testing Center,Beijing Institute of Technology,Beijing 102488,China)

机构地区：[1]北京理工大学分析测试中心,北京102488

出　　处：《人工晶体学报》2021年第8期1457-1463,1477,共8页Journal of Synthetic Crystals

摘　　要：本文用膦配体三苯基膦(PPh_(3))和巯基配体5-甲氧基苯并咪唑-2-硫醇(L)合成了一例新型亚铜配合物[CuBr(L)(PPh_(3))_(2)]·2CH_(3)OH(1)。通过X射线单晶衍射、元素分析、热重分析及多种谱学分析对配合物(1)进行了表征。配合物(1)结晶于单斜晶系,空间群为P2_(1/c),中心金属离子与溴离子、两个PPh_(3)的磷原子以及一个L配体的巯基进行配位,得到四配位亚铜单核配合物。此外,配合物(1)在甲醇溶液下的荧光以及固体荧光均为基于PPh_(3)配体的荷移跃迁(MLCT),不同之处在于PPh_(3)甲醇溶液中的荧光没有红移,而固体荧光红移了6 nm,显示甲醇溶液状态下的配合物(1)与固体状态下的结构有差异。In this work,a new Cu(I)complex[CuBr(L)(PPh_(3))_(2)]·2CH_(3)OH(1)was synthesized using triphenylphosphine(PPh_(3))and 5-methoxybenzimidazole-2-thiol(L).The complex was characterized by single crystal X-ray diffraction,elemental analysis,thermogravimetric analysis and other various spectroscopic analyses.X-ray crystallographic analysis reveals that complex(1)crystallizes in the monoclinic system with P2_(1/c) space group.Each central metal ion is four-coordinated with one bromide ion,two phosphorus atoms from two PPh_(3) ligands and one sulphur atom from one L ligand,resulting in a mononuclear complex.In addition,the fluorescence spectra of 1 in methanol solution and solid state show that the emission mechanism belongs to metal-to-ligand charge transfer(MLCT)based on PPh_(3).The difference of the fluorescence emission maximum of 1 in the methanol solution is not shifted compared to PPh_(3),while red-shifted by 6 nm compared to PPh_(3) in solid state,indicating that the structure of 1 in methanol solution is different from that in solid state.

关 键 词：一价铜配合物 晶体结构 谱学性质 三苯基膦 5-甲氧基苯并咪唑-2-硫醇 

分 类 号：O641.4[理学—物理化学]