Bio-inspired, side-on attachment of a ruthenium photosensitizer to an iron hydrogenase active site model

被引：93

作者：

Ekstoem, Jesper

Abrahamsson, Maria

Olson, Carol

Bergquist, Jonas

Kaynak, Filiz B.

Eriksson, Lars

Licheng, Sun

Becker, Hans-Christian

Akermark, Bjoern

Hammarstroem, Leif

Ott, Sascha ^{[1
]}

机构：

[1] Stockholm Univ, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden

[2] Uppsala Univ, Dept Photochem & Mol Sci, S-75120 Uppsala, Sweden

[3] Uppsala Univ, BMC, Dept Phys & Analyt Chem, S-75124 Uppsala, Sweden

[4] Stockholm Univ, Arrhenius Lab, Dept Struct Chem, S-10691 Stockholm, Sweden

[5] Royal Inst Technol, S-10044 Stockholm, Sweden

来源：

DALTON TRANSACTIONS | 2006年 / 38期

关键词：

D O I：

10.1039/b606659c

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The first ruthenium - diiron complex [(mu- pdt) Fe-2(CO)(5){PPh2(C(6)H(4)CCbpy)} Ru(bpy)(2)](2+) 1 (pdt = propyldithiolate, bpy = 2,2'-bipyridine) is described in which the photoactive ruthenium trisbipyridyl unit is linked to a model of the iron hydrogenase active site by a ligand directly attached to one of the iron centers. Electrochemical and photophysical studies show that the light-induced MLCT excited state of the title complex is localized towards the potential diiron acceptor unit. However, the relatively mild potential required for the reduction of the acetylenic bipyridine together with the easily oxidized diiron portion leads to a reductive quenching of the excited state, instead. This process results in a transiently oxidized diiron unit which may explain the surprisingly high light sensitivity of complex 1.

引用

页码：4599 / 4606

页数：8