[Pt(mesBIAN)(tda)]: A near-infrared emitter and singlet oxygen sensitizer

被引：22

作者：

Rachford, Aaron A. ^{[1
,2
]}

Hua, Fei ^{[1
,2
]}

Adams, Christopher J. ^{[3
]}

Castellano, Felix N. ^{[1
,2
]}

机构：

[1] Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA

[2] Bowling Green State Univ, Ctr Photochem Sci, Bowling Green, OH 43403 USA

[3] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England

来源：

DALTON TRANSACTIONS | 2009年 / 20期

关键词：

TRIPLET EXCITED-STATE; PHOTOPHYSICAL PROPERTIES; ACETYLIDE COMPLEXES; PLATINUM(II) COMPLEXES; CHARGE-TRANSFER; LUMINESCENCE; LIGANDS; PHOTOLUMINESCENCE; CHROMOPHORES; ABSORPTION;

D O I：

10.1039/b818177b

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis and subsequent photophysical investigation of [Pt(mesBIAN)(tda)], where mesBIAN is bis(mesitylimino)acenaphthene and tda is tolan-2,2'-diacetylide, reveal excited-state characteristics best described as triplet charge transfer ((CT)-C-3) in nature upon visible light excitation. Large ground-state dipole moments are apparent as the absorption spectrum dramatically red-shifts with decreasing solvent polarity. The (CT)-C-3 excited state is significantly lower in energy than the ligand-centered (3)tda excited-state, as confirmed by steady-state and time-resolved techniques. Singlet oxygen sensitization studies demonstrate that O-1(2) production occurs by diffusive quenching from the photo-excited (CT)-C-3 state (Phi(Delta) = 0.24, lambda(max) similar to 1270 nm) in oxygen-saturated dichloromethane.

引用

页码：3950 / 3954

页数：5

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