Synthesis, photophysical and redox behavior of unsymmetrical binuclear Ru(II) complexes based on tris(1-pyrazolyl)methane

被引：10
|
作者：
Guelfi, Massimo [1 ]
Puntoriero, Fausto [2 ]
Arrigo, Antonino [2 ]
Serroni, Scolastica [2 ]
Cifelli, Mario [3 ]
Denti, Gianfranco [1 ]
机构：
[1] Univ Pisa, Inorgan Chem Lab, Fac Agr, I-56100 Pisa, Italy
[2] Univ Messina, Dept Chem Sci, I-98166 Messina, Italy
[3] Univ Pisa, Dept Chem & Ind Chem, I-56100 I- Pisa, Italy
来源：
INORGANICA CHIMICA ACTA | 2013年 / 398卷
关键词：
Ruthenium; Tpm; Achiral polypyridine complexes; Binuclear complexes; Mixed-valent compounds; MIXED-VALENCE SYSTEMS; ELECTRON-TRANSFER; MULTICOMPONENT SYSTEMS; INTERVALENCE TRANSFER; METAL; TRANSITION; RUTHENIUM(II); COMMUNICATION; COORDINATION; CHEMISTRY;
D O I：
10.1016/j.ica.2012.12.007
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Six new unsymmetrical achiral complexes of Ru-II containing the tripodal ligand tris(1-pyrazolyl) methan (tpm) on both metal centers have been prepared and fully characterized. Their general formula is [CLa(tpm) Ru(mu BL) Ru(tpm) CLb](4+), were CLa and CLb represent two different chelating ligands (2,2'-bipyridine (bpy), 1,10-phenanthroline (phen) or 2,20-biquinoline (biq)); BL can be 4,4'-bipyridine (4,4'-bpy) or pirazine (pz). The structures of the new species have been elucidated by H-1 NMR, COSY and NOESY spectroscopy. Electrochemical, UV-Vis spectroscopical, luminescence, and spectroelectrochemical properties have been investigated for all the binuclear complexes. For two representative species DFT calculations were carried out. The experimental data have been thoroughly interpreted in terms of the role played by each constituent subunit within the assemblies. These results add comparative pieces of information to the knowledge of the properties of the Ru-II-based complexes. (C) 2012 Elsevier B.V. All rights reserved.
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页码：19 / 27
页数：9
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