Two new CO 2-soluble rhenium(l) bipyridine complexes bearing the fluorinated alkyl ligands 4,4′-(C 6F 13CH 2CH 2CH 2) 2-2,2′-bipyridine (1a), and 4,4′-(C 8F 17CH 2CH 2CH 2) 2-2,2′-bipyridine (1b) have been prepared and their photophysical properties investigated in CH 3CN and supercritical C0 2. Electrochemical and spectroscopic characterization of these complexes in CH 3CN suggests that the three methylene units effectively insulate the bipyridyl rings and the rhenium center from the electron-withdrawing effect of the fluorinated alkyl chains. Reductive quenching of the metal-to-ligand charge-transfer excited states with triethylamine reveals quenching rate constants in supercritical C0 2 that are only 6 times slower than those in CH 6CN.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry