面式-[Re(CO)₃(11,12-X₂dppz)(py)]⁺（X = H、F或Me）的溶剂依赖性光物理性质

Solvent dependent photophysics of fac-[Re(CO)(3)(11,12-X(2)dppz)(py)](+)(X = H, F or Me).

作者信息

Dyer Joanne, Creely Caitriona M, Penedo J Carlos, Grills David C, Hudson Sarah, Matousek Pavel, Parker Anthony W, Towrie Michael, Kelly John M, George Michael W

机构信息

School of Chemistry, University of Nottingham, University Park, Nottingham, UK.

出版信息

Photochem Photobiol Sci. 2007 Jul;6(7):741-8. doi: 10.1039/b618651c. Epub 2007 May 8.

DOI:10.1039/b618651c

PMID:17609767

Abstract

The photophysical properties of Re(CO)(3)(dppz)(py) (dppz = dipyrido-[3,2-a:2',3'-c] phenazine) and its 11,12 substituted derivatives Re(CO)(3)(dppzMe(2))(py) and Re(CO)(3)(dppzF(2))(py) 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) is strongly quenched.

摘要

已使用磷光以及皮秒瞬态可见和红外吸收光谱方法，在有机和水性环境中研究了Re(CO)(3)(dppz)(py)（dppz = 二吡啶并-[3,2-a:2',3'-c]吩嗪）及其11,12取代衍生物Re(CO)(3)(dppzMe(2))(py)和Re(CO)(3)(dppzF(2))(py)的光物理性质。评估了配体内IL(π-π*)和金属到配体电荷转移MLCT(phz)激发态的作用，并用于解释二氟取代的主要影响，这在水中尤为显著，其中Re(CO)(3)(dppzF(2))(py)的激发态被强烈猝灭。