Cyclometalated Diruthenium Complexes Bridged by 3,3,5,5-Tetra(pyrid-2-yl)biphenyl: Tuning of Electronic Properties and Intervalence Charge Transfer by Terminal Ligand Effects

	Cyclometalated Diruthenium Complexes Bridged by 3,3,5,5-Tetra(pyrid-2-yl)biphenyl: Tuning of Electronic Properties and Intervalence Charge Transfer by Terminal Ligand Effects
	Yang, Wen-Wen; Shao, Jiang-Yang; Zhong, Yu-Wu
刊名	EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
	2015-07-01
期号	19 页码:3195-3204
关键词	Mixed-valent compounds Metallacycles Ruthenium Density functional calculations Electron transfer
英文摘要	Six cyclometalated diruthenium complexes bridged by 3,3,5,5-tetra(pyrid-2-yl)biphenyl have been prepared, in which 1(2+), 3(2+), and 5(2+) are symmetric complexes with different terminal ligands [2,6-bis(N-methylbenzimidazolyl)pyridine (Mebip), 4-tolyl-2,2:6,2-terpyridine (ttpy), and trimethyl-4,4,4-tricarboxylate-2,2:6,2-terpyridine (Me(3)tctpy), respectively]. Three other complexes with mixed terminal ligands (Mebip-Me(3)tctpy for 6(2+); Mebip-ttpy for 7(2+); ttpy-Me(3)tctpy for 8(2+)) are structurally nonsymmetric. These complexes display two consecutive Ru(III/II) redox couples between 0.20 and 0.90 V vs. Ag/AgCl, with the potential splitting ranging from 150 (for 5(2+)) to 280 mV (for 6(2+)). The mixed-valent states of these complexes have been generated by stepwise electrolysis. The symmetric complexes show intervalence charge transfer (IVCT) transitions at similar energy (E-op approximate to 5750 cm(-1)), with the electronic coupling parameter V-ab of 1240, 1220, and 970 cm(-1) for 1(3+), 3(3+), and 5(3+), respectively. The nonsymmetric series show significantly different E-op (7600, 5850, and 6650 cm(-1) for 6(3+), 7(3+), and 8(3+), respectively) but V-ab values that were comparable to that of 1(3+). DFT and TDDFT calculations have been performed to complement these experimental results.
收录类别	SCI
语种	英语
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/27845]
专题	化学研究所_光化学实验室
作者单位	Chinese Acad Sci, Inst Chem, CAS Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yang, Wen-Wen,Shao, Jiang-Yang,Zhong, Yu-Wu. Cyclometalated Diruthenium Complexes Bridged by 3,3,5,5-Tetra(pyrid-2-yl)biphenyl: Tuning of Electronic Properties and Intervalence Charge Transfer by Terminal Ligand Effects[J]. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY,2015(19):3195-3204.
APA	Yang, Wen-Wen,Shao, Jiang-Yang,&Zhong, Yu-Wu.(2015).Cyclometalated Diruthenium Complexes Bridged by 3,3,5,5-Tetra(pyrid-2-yl)biphenyl: Tuning of Electronic Properties and Intervalence Charge Transfer by Terminal Ligand Effects.EUROPEAN JOURNAL OF INORGANIC CHEMISTRY(19),3195-3204.
MLA	Yang, Wen-Wen,et al."Cyclometalated Diruthenium Complexes Bridged by 3,3,5,5-Tetra(pyrid-2-yl)biphenyl: Tuning of Electronic Properties and Intervalence Charge Transfer by Terminal Ligand Effects".EUROPEAN JOURNAL OF INORGANIC CHEMISTRY .19(2015):3195-3204.