Outstanding visible trans-to-cis photoinduced isomerization of fac-[Re(CO)3(dcbH2)(trans-stpy)]+ on thin TiO2 film

Abstract

The fac-[Re(CO)3(dcbH2)(trans-stpy)]+ complex, dcbH2 = 2,2’-bipyridine-4,4’-dicarboxylic acid and trans-stpy = trans-4-styrylpyridine, has been strategically designed to absorb visible light up to 436 nm. For device purpose, the complex is also engineered to adsorb to the mesoporous TiO2 thin film through carboxylic acid groups. In this work, an efficient visible trans-to-cis photoisomerization is described for the first time for an anchored-rhenium(I) complex on the TiO2 surface.

Keywords

• TiO2-Re(I) trans-cis photoisomerization
• Visible sensitization
• Immobilization on TiO2
• Rhenium(I) tricarbonyl complex