title: Photoluminescence electron-transfer quenching of rhenium(I) complexes with organic sulfides.
abstract: Electron-transfer(ET) from organic sulfides to excited state rhenium(I)-based heteroleptic tricarbonyl complexes [Re(bpy)(CO)(3)(py)](+) (I) and [Re(bpy)(CO)(3)(ind))](+) (II) in acetonitrile solution is facile and luminescence quenching constants, k(q), are in the range 10(5)-10(8) M(-1)s(-1). The detection of the sulfide radical cation in this system using time-resolved absorption spectroscopy is a direct evidence for the ET nature of the reaction. The k(q) values for the quenching of Re(I)-complexes with organic sulfides are analyzed with a scheme involving rate controlling electron transfer process. The measured rate constants for the electron transfer (ET) reaction are close to the values calculated from Marcus theory.
authors.affiliation: School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India.
authors.forename: M
authors.initials: M
authors.lastname: Rajkumar
authors.forename: J
authors.initials: J
authors.lastname: Bhuvaneswari
authors.forename: M
authors.initials: M
authors.lastname: Velayudham
authors.forename: E
authors.initials: E
authors.lastname: Rajkumar
authors.forename: S
authors.initials: S
authors.lastname: Rajagopal
mesh_terms: D004579:Electron Transport; D049449:Luminescence; D008163:Luminescent Measurements; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012211:Rhenium / Q000737:chemistry*; D013237:Stereoisomerism; D013440:Sulfides / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D013440:Sulfides; D012211:Rhenium