The electronic and solvatochromic properties of [Co(L)(bipyridine)2]+ (L = o-catecholato, o-benzenedithiolato) species: a combined experimental and computational study.
The electronic and solvatochromic properties of [Co(L)(bipyridine)2]+ (L = o-catecholato, o-benzenedithiolato) species: a combined experimental and computational study.
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[Co(L)(联吡啶)2](L = 邻儿茶酚、邻苯二硫醇)物质的电子和溶剂化显色性质:实验和计算相结合的研究。
DOI:
10.1039/c6dt02807a
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Cioncoloni G
中科院分区:
文献类型:
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作者:
Cioncoloni G
Complexes of Co(III) containing mixed chelating diimine and o-quinone ligand sets are of fundamental interest on account of their fascinating magnetic and electronic properties. Whilst complexes of this type containing one diimine and two o-quinone ligands have been studied extensively, those with the reverse stoichiometry (two diimines and one o-quinone) are much rarer. Herein, we describe a ready route to the synthesis of the complex [CoIII(o-catecholate) (2,2′-bipyridine)2]+ (1), and also report the synthesis of [CoIII(o-catecholate)(5,5′-dimethyl-2,2′-bipyridine)2]+ (2) and [CoIII(o-benezenedithiolate)(5,5′-dimethyl-2,2′-bipyridine)2]+ (3) for the first time. Spectroscopic studies show that complex 2 displays intriguing solvatochromic behaviour as a function of solvent hydrogen bond donation ability, a property of this type of complex which has hitherto not been reported. Time-dependent density function theory (TD-DFT) shows that this effect arises as a result of hydrogen bonding between the solvent and the oxygen atoms of the catecholate ligand. In contrast, the sulfur atoms in the benzenedithiolate analogue 3 are much weaker acceptors of hydrogen bonds from the solvent, meaning that complex 3 is only very weakly solvatochromic. Finally, we show that complex 2 has some potential as a molecular probe that can report on the composition of mixed solvent systems as a function of its absorbance spectrum.
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DOI:
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发表时间:
2011
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影响因子:
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作者:
M. Rudolph;T. Ziegler;J. Autschbach
通讯作者:
J. Autschbach
DOI:
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发表时间:
1982
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作者:
K. Andrä;F. Fleischer
通讯作者:
F. Fleischer
DOI:
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发表时间:
1995
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影响因子:
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作者:
L. Simándi;T. Barna;G. Argay;T. L. Simándi
通讯作者:
T. L. Simándi
DOI:
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发表时间:
2011
期刊:
影响因子:
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作者:
Y. Suenaga;Yasuhiro Hirano;Yukiko Umehata;T. Minematsu
通讯作者:
T. Minematsu
DOI:
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发表时间:
1976
期刊:
影响因子:
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作者:
Peter A. Wicklund;L. S. Beckmann;Dennis G. Brown
通讯作者:
Dennis G. Brown