Abstract
A high-yield route to N-heterocyclic carbene (NHC) derivatives of 2,4,5,6-tetra(9H-carbazol-9-yl)benzene-1,3-dicarbonitrile (4CzIPN) is reported. The NHC-dye was studied in solution by NMR, infrared- and UV–vis spectroscopy, cyclic voltammetry, and photoluminescence. The NHC group bonds to the surface of TiO2 forming a semiconductor/chromophore system that was characterized by cyclic voltammetry, XPS, infrared and UV–vis spectroscopy as well as photoluminescence. The bonding between the NHC group and TiO2 is quite stable towards the photooxidation of sacrificial electron donors under alkaline conditions without applying any protective layers.
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