Photophysical properties and singlet oxygen production by ruthenium(II) complexes of benzo[i]dipyrido[3,2-a:2',3'-c]phenazine: spectroscopic and TD-DFT study.
The photophysical properties of a series of Ru(II) complexes containing benzo[i]dipyrido[3,2-a:2',3'-c]phenazine (dppn) as a ligand are reported. Transient absorption spectroscopy studies indicate that, in contrast to related Ru(dppz) complexes (dppz = dipyrido[3,2-a:2',3'-c]phenazine), the excited state of all the dppn systems is a long-lived pipi* triplet state. Computational studies (DFT and TD-DFT) confirm that the excited state is based on the dppn ligand. Near-infrared luminescence studies reveal that the complexes are efficient singlet oxygen sensitizers with yields of 70-83%.
Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom.
Simon P
SP
Foxon
Mohammed A H
MA
Alamiry
Mike G
MG
Walker
Anthony J H M
AJ
Meijer
Igor V
IV
Sazanovich
Julia A
JA
Weinstein
James A
JA
Thomas
D003198:Computer Simulation; D056831:Coordination Complexes / Q000737:chemistry*; D008024:Ligands; D008956:Models, Chemical; D009942:Organometallic Compounds / Q000737:chemistry*; D055668:Photochemical Processes; D012428:Ruthenium / Q000737:chemistry*; D026082:Singlet Oxygen / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors
D056831:Coordination Complexes; D008024:Ligands; D009942:Organometallic Compounds; D026082:Singlet Oxygen; D012428:Ruthenium