Synthesis and characterization of rhenium(I) 4,4′-dicarboxy-2,2′-bipyridine tricarbonyl complexes for solar energy conversion

被引:11
|
作者
Komreddy, Venugopal [1 ]
Ensz, Kevin [1 ]
Nguyen, Huy [1 ]
Rillema, D. Paul [1 ]
机构
[1] Wichita State Univ, Dept Chem, Wichita, KS 67260 USA
基金
美国国家科学基金会;
关键词
Rhenium(1); Carboxylic acid; Electronic spectra; Acid/base; DSSC; PHOTOPHYSICAL PROPERTIES; EXCITED-STATES; DYE; RUTHENIUM(II); REDUCTION; LIGANDS; TIO2; CO2; LUMINESCENCE; BIPYRIDYL;
D O I
10.1016/j.ica.2020.119815
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The synthesis of a series of rhenium(I) tricarbonyl complexes containing 4,4 '-dicarboxy-2,2 '-bipyridine (dcbpy) and various halide or pseudohalide ligands is reported. Deprotonation of the carboxylates occurs in basic medium resulting in upfield H-1 NMR shifts for the protons of the carboxyl groups attached to 2,2 '-bipyridine. Metal-to-ligand charge transfer (MLCT) due to d pi -> pi* transitions systematically shift in the halide series from 382 nm for Re(dcbpy)(CO)(3)F to 436 nm for Re(dcbpy)(CO)(3)I. The compounds emit in the 600-650 nm region and have emission lifetimes greater than 50 ns. The solar energy conversion efficiency is less than 1% when TiO2- Re(dcbpy)(CO)(3)X, (X = F, CN, SCN, Br, I), photoanodes are used in Gratzel cells.
引用
收藏
页数:8
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