Electronic Energy Transduction from {Ru(py)4} Chromophores to Cr(III) Luminophores

被引：15

作者：

Cadranel, Alejandro ^{[1
,2
,3
,4
]}

Oviedo, Paola S. ^{[1
,2
]}

Albores, Pablo ^{[1
,2
]}

Baraldo, Luis M. ^{[1
,2
]}

Guldi, Dirk M. ^{[3
,4
]}

Hodak, Jose H. ^{[1
,2
]}

机构：

[1] Univ Buenos Aires, Dept Quim Analit Inorgan & Quim Fis, Fac Ciencias Exactas & Nat, Pabellon 2,Ciudad Univ,C1428EHA, Buenos Aires, DF, Argentina

[2] Univ Buenos Aires, INQUIMAE, Fac Ciencias Exactas & Nat, Pabellon 2,Ciudad Univ,C1428EHA, Buenos Aires, DF, Argentina

[3] Friedrich Alexander Univ Erlangen Nurnberg, Dept Chem & Pharm, Egerlandstr 1-3, D-91058 Erlangen, Germany

[4] Friedrich Alexander Univ Erlangen Nurnberg, ICMM, Egerlandstr 1-3, D-91058 Erlangen, Germany

来源：

INORGANIC CHEMISTRY | 2018年 / 57卷 / 06期

关键词：

TRANSITION-METAL-COMPLEXES; MIXED-VALENCE COMPLEXES; SENSITIZED SOLAR-CELLS; EXCITED-STATE BEHAVIOR; LIGHT PHOTOREDOX CATALYSIS; LIGAND-FIELD STATES; CHROMIUM(III) COMPLEXES; STERIC CONSTRAINT; CHARGE-TRANSFER; GROUND-STATE;

D O I：

10.1021/acs.inorgchem.7b02799

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Despite the large body of work on {Ru(bpy)(2)} sensitizer fragments, the same attention has not been devoted to their {Ru(py)(4)} analogues. In this context, we explored the donor-acceptor trans[Ru(L)(4){(mu-NC)Cr(CN)(5)}(2)](4-), where L = pyridine, 4-methoxypyridine, 4-dimethylaminopyridine. We report on the synthesis and the crystal structure as well as the electrochemical, spectroscopical, and photo physical properties of these trimetallic complexes, including transient absorption measurements. We observed emission from chromium centered d-d states upon illuminating into either MLCT or MM'CT absorptions of {Ru(L)(4)} or {Ru-Cr}, respectively. The underlying energy transfer is as fast as 600 fs with quantum efficiencies ranging from 10% to 100%. These results document that {Ru(py)(4)} sensitizer fragments are as efficient as {Ru(bpy)(2)} in short-range energy transfer scenarios.

引用

页码：3042 / 3053

页数：12

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