Synthesis and electrochemical properties of bis(bipyridine)ruthenium(II) complexes bearing pyridinyl- and pyridinylidene ligands induced by cyclometalation of N'-methylated bipyridinium analogs
Synthesis and electrochemical properties of bis(bipyridine)ruthenium(II) complexes bearing pyridinyl- and pyridinylidene ligands induced by cyclometalation of N'-methylated bipyridinium analogs
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DOI：
10.1016/j.jorganchem.2004.11.032
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发表时间：
2005-03-01
影响因子：
2.3
通讯作者：
Tanaka, K
中科院分区：
文献类型：
--
作者：
Koizumi, T;Tomon, T;Tanaka, K
合成并表征了(N，C)-联吡啶季铵盐双齿配体RuL(Bpy)(2)(PF6)(2)(bpy=2，2‘-联吡啶，(1)，L=L-1=N’-甲基-2，4‘-联吡啶；(2)，L=L-2=N’-甲基-2，3‘-联吡啶)。通过X-射线结构分析确定了化合物2的结构。C-13{H-1}核磁共振波谱和循环伏安研究表明，这些配体的配位方式有很大的不同，即(N，C)-配体1和2中的C配位环分别以吡啶和吡二亚甲基的方式与Ru(II)相连。1和2的配体局域氧化还原电位也揭示了两种配体给电子能力的显著差异。(C)2004爱思唯尔B.V.保留所有权利。
Ruthenium complexes with bipyridine-analogous quaternized (N,C) bidentate ligands [RuL(bpy)(2)](PF6)(2) (bpy = 2,2'-bipyridine, (1), L = L-1 = N'-methyl-2,4'-bipyridinium; (2), L = L-2 = N'-methyl-2,3'-bipyridinium) were synthesized and characterized. The structure of complex 2 was determined by the X-ray structure analysis. The C-13{H-1} NMR spectroscopic and cyclic voltammetric studies indicate that the coordination modes of these ligands are quite different, that is, the C-coordinated rings of (N,C)-ligands in 1 and 2 are linked to ruthenium(II) with a pyridinium manner and a pyridinylidene one, respectively. The ligand-localized redox potentials of 1 and 2 also revealed the substantial difference in the electron donating ability of both ligands. (c) 2004 Elsevier B.V. All rights reserved.