Synthesis, structural characterization, and luminescence properties of multinuclear silver complexes of pyrazole-functionalized NHC ligands containing Ag–Ag and Ag–π interactions
作者:Yongbo Zhou、Xiaoming Zhang、Wanzhi Chen、Huayu Qiu
DOI:10.1016/j.jorganchem.2007.10.042
日期:2008.1
led to the successful isolation of tetranuclear [Ag4(L)2](X)2 (X = PF6− or BF4−; H3L1 = 3,5-bis(N-benzylimidazoliumyl)pyrazole, H3L2 = 3,5-bis(N-(2,4,6-trimethylphenyl)imidazoliumyl)pyrazole, H3L3 = imidazolium cyclophane from the condensation of 3,5-bis(chloromethyl)pyrazole and 1,4-bis(imidazolyl)butane) and trinuclear silver clusters supported by N-heterocyclic carbene ligands in high yields. The
通过N-烷基咪唑与3,5-双(氯甲基)吡唑或2-(1-(2-氯乙基)-5-甲基-1H-吡唑-3-基)-6-(5-甲基-1-乙烯基-1H-吡唑-3-基)吡啶。有Ag这些咪唑鎓盐的反应2 O LED到四核的成功分离将[Ag 4(L)2 ](X)2(X = PF 6 -或BF 4 - ; H 3 L1 = 3,5-双(Ñ -苄基咪唑基)吡唑,H 3 L2 = 3,5-双(N-(2,4,6-三甲基苯基)咪唑基)吡唑,H 3L3 = 3,5-双(氯甲基)吡唑与1,4-双(咪唑基)丁烷的缩合形成的咪唑鎓环烷)和由N-杂环卡宾配体支撑的高收率的三核银簇。这些银配合物的分子结构已通过1 H,13 C NMR,ESI-MS光谱和X射线衍射分析确认。四核络合物[Ag 4(L1)2 ](PF 6)2(1)和[Ag 4(L2)2 ](BF 4)2(2)由一对Ag – Ag接触(约3.11Å)组成)显示弱银-银相互作用。[Ag