@article { ISI:000291890900010,
	title = {Photophysical and electrochemical properties of Ru(II) complexes containing tridentate bisphosphino-oligothiophene ligands},
	journal = {DALTON TRANSACTIONS},
	volume = {40},
	number = {26},
	year = {2011},
	pages = {6912-6921},
	abstract = {Nine Ru(II) complexes containing the conjugated oligothiophene ligands 3,3 {\textquoteleft}{\textquoteright}-bis(diphenylphosphino)-2,2{\textquoteright}: 5{\textquoteright},2 {\textquoteleft}{\textquoteright}-terthiophene (P2T3) and 4{\textquoteright}, 3{\textquoteright}{\textquoteright}{\textquoteright}-bis(diphenylphosphino)-3,3{\textquoteright}{\textquoteright}{\textquoteright}{\textquoteright}-dihexyl-2,2{\textquoteright}: 5{\textquoteright},2 {\textquoteleft}{\textquoteright}:5 {\textquoteleft}{\textquoteright},2{\textquoteright}{\textquoteright}{\textquoteright}:5{\textquoteright}{\textquoteright}{\textquoteright},2{\textquoteright}{\textquoteright}{\textquoteright}{\textquoteright}-pentathiophene (P2T5) were prepared and characterized. P2T3 and P2T5 bond as tridentate ligands and three of the complexes (1, 2 and 5) form green five-coordinate Ru(II) complexes in solution. Cyclic voltammetry, variable temperature UV-vis spectroscopy and time-resolved transient absorption spectroscopy were used to characterize the electronic properties of the complexes. Increased conjugation in the complexes containing the P2T5 ligand resulted in a lowering of the oxidation potential of the oligothiophene, but electropolymerization was not observed. The electronic spectra were dominated by pi-pi{*} transitions. All of the complexes were non-emissive both at room temperature and low temperature, indicating the excited state decays by other, non-radiative pathways. The transient absorption spectrum of complex 7 shows a species with a band at 475 nm and a lifetime of similar to 100 ns, assigned to a ligand-based triplet state.},
	issn = {1477-9226},
	doi = {10.1039/c1dt10217f},
	author = {Kuchison, Angela M. and Wolf, Michael O. and Patrick, Brian O.}
}
