title: Strong π-delocalization and substitution effect on electronic properties of dithienylpyrrole-containing bipyridine ligands and corresponding ruthenium complexes.
abstract: The first dithienylpyrrole (DTP)-based bipyridine ligands has been prepared and coordinated with ruthenium to give the corresponding homoleptic complexes. Bipyridine was bound at pyrrole (DTP(1)) or thiophene (DTP(2)) ring. A strong bathochromic effect was obtained by switching from pyrrole to thiophene for ligands and complexes. Interestingly the DTP(2) series offered a wide absorption window from UV to visible domain with an almost constant absorbance. These effects are due to a larger extent of delocalization as supported by DFT calculations and photophysical measurements.
authors.affiliation: Groupe SOR, SRSMC, Université de Lorraine, CNRS, Faculté des Sciences, Boulevard des Aiguillettes, F-54506 Vandoeuvre-Lès-Nancy, France.
authors.forename: Sajida
authors.initials: S
authors.lastname: Noureen
authors.forename: Stefano
authors.initials: S
authors.lastname: Caramori
authors.forename: Antonio
authors.initials: A
authors.lastname: Monari
authors.forename: Xavier
authors.initials: X
authors.lastname: Assfeld
authors.forename: Roberto
authors.initials: R
authors.lastname: Argazzi
authors.forename: Carlo A
authors.initials: CA
authors.lastname: Bignozzi
authors.forename: Marc
authors.initials: M
authors.lastname: Beley
authors.forename: Philippe C
authors.initials: PC
authors.lastname: Gros