Solvent dependent photophysics of fac-[Re(CO)3(11,12-X2dppz)(py)]+ (X = H, F or Me)

Solvent dependent photophysics of fac-[Re(CO)3(11,12-X2dppz)(py)]+ (X = H, F or Me)
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DOI:
10.1039/b618651c
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发表时间:
2007-01-01
影响因子:
3.1
通讯作者:
George, Michael W.
George, Michael W.
中科院分区:
化学3区
文献类型:
--
作者:
Dyer, Joanne;Creely, Caitriona M.;George, Michael W.

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[Re(CO)(3)(dppz)(py)](+)的电子物理性质(dppz =联吡啶并-[3,2- a:2 ′,3 ′-c]吩嗪)(1)及其11,12个取代的衍生物[Re(CO)(3)(dppzMe(2))(py)](+)(2)和[Re(CO)(3)(dppzF(2))(py)](+)(3)已经在有机和水环境中使用磷光和皮秒瞬态可见光和红外吸收光谱方法进行了研究。评估配体内IL(pi-pi*)和金属-配体电荷转移MLCT(phz)激发态的作用,并用于解释二氟取代的主要效应,这在水中特别显著,其中[Re(CO)(3)(dppzF(2))(py)](+)(3)的激发态被强烈淬灭。
The photophysical properties of [Re(CO)(3)(dppz)(py)](+) (dppz = dipyrido-[3,2- a: 2', 3'-c] phenazine) ( 1) and its 11,12 substituted derivatives [Re(CO)(3)(dppzMe(2))(py)](+) (2) and [Re(CO)(3)(dppzF(2))(py)](+) ( 3) have been examined in organic and aqueous environments using phosphorescence and picosecond transient visible and infrared absorption spectroscopic methods. The roles of the intraligand IL(pi-pi*) and metal-to-ligand charge transfer MLCT(phz) excited states are evaluated and used to explain the major effect of difluoro-substitution, which is particularly remarkable in water, where the excited state of [Re(CO)(3)(dppzF(2))(py)](+) (3) is strongly quenched.