258352-44-2Relevant academic research and scientific papers
Synthesis and photophysical properties of trans-dithiocyanato bis(4,4′-dicarboxylic acid-2,2′-bipyridine) ruthenium(II) charge transfer sensitizer
Zakeeruddin,Nazeeruddin,Humphry-Baker,Graetzel
, p. 250 - 253 (1999)
The ruthenium complexes trans-[Ru(dcbpyH2)2(Cl)2] (1), trans-[Ru(dcbpyH2)2(NCS)2] (2), were synthesized and characterized by UV-Vis absorption, emission, IR, and NMR spectroscopy. The absorption and emission maxima of the trans complexes are red-shifted when compared to the cis analogs. The low energy MLCT maximum of complex 2 shows at 582 nm and exhibits a luminescence consisting of a single band with a maximum at 870 nm, in DMF solution at 298 K. The red shift of the MLCT absorption of the trans-chloro complex 1 (662 nm) is even more pronounced than that of the trans-complex 2 and shows the onset of weak and broad emission signals above 900 nm. The proton NMR spectra of the trans-isomers show only three peaks corresponding to the two dcbpy ligands in which all the pyridine rings are equivalent. The 13C NMR spectrum of the trans-isomer is characterized by a relatively simple pattern of resonances from the four equivalent pyridine rings. The enhanced red response of the trans -complex 2 renders it an attractive candidate as a panchromatic charge transfer sensitizer in mesoporous oxide solar cells.
PROCESS FOR THE SYNTHESIS OF PRECURSOR COMPLEXES OF TITANIUM DIOXIDE SENSITIZATION DYES BASED ON RUTHENIUM POLYPYRIDINE COMPLEXES
-
Page/Page column 11-12, (2012/06/16)
The present invention concerns a process for the synthesis of precursor complexes and titanium dioxide sensitizing dyes based on ruthenium polypyridine complexes comprising the microwave irradiation under high pressure and in aqueous environment system of precursor complexes and sensitizers based on carboxylic functionalized ruthenium polypyridine complexes
