Intramolecular energy transfer processes in binuclear Re-Os complexes

被引:57
作者
Argazzi, R
Bertolasi, E
Chiorboli, C
Bignozzi, CA
Itokazu, MK
Iha, NYM
机构
[1] Univ Ferrara, Dipartimento Chim, CNR, Ctr Fotoreattivita & Catalisi, I-44100 Ferrara, Italy
[2] Univ Sao Paulo, Inst Quim, BR-05508900 Sao Paulo, Brazil
关键词
D O I
10.1021/ic010224y
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A series of bimetallic complexes of general formula [(phen)Rc(CO)(3)LOs(Lrpy)(bpy)](3+) (bpy = 2,2'-bipytidine, phen = 1,10-phenanthroline, trpy = 2,2':6',2"-terpyridine, and L = 4,4'-bipyfidine (4,4'-bpy), trans- 1,2-bis(4pyridyl)ethylene (t-bpe), or 1,2-bis(4-pyridyl)ethane (bpa)) and the model mononuclear species [(phen)Re(CO)(3)L](+) and [Os(trpy)(bpy)L](2+) have been synthesized and their photophysical and photochemical properties studied. In the binuclear species an efficient Re-I*-Os-II energy transfer is observed, which is analyzed in terms of Forster theory. In the binuclear [(phen)Re(CO)(3)(t-bpe)Os(trpy)(bpy)](3+) Complex. the trans to cis isomerization of the coordinated t-bpe ligand, characteristic of the [(phen)Re(CO)(3)(t-bpe)](+) subunit, is inhibited by competitive intramolecular energy transfer.
引用
收藏
页码:6885 / 6891
页数:7
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