title: Photoinduced electron-transfer reactions in two room-temperature ionic liquids: 1-butyl-3-methylimidazolium hexafluorophosphate and 1-octyl-3-methylimidazolium hexafluorophosphate.
abstract: Photoinduced electron transfer in two room-temperature ionic liquids, 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF(6)) and 1-octyl-3-methylimidazolium hexafluorophosphate (OMIM-PF(6)), has been investigated using steady-state fluorescence quenching of 9,10-dicyanoanthracene with a series of single electron donors. From these fluorescence quenching rates, reorganization energy (lambda) values and k(diff) values can be derived from a Rehm-Weller analysis. In many cases, these fluorescence quenching reactions occur at rates larger than what would be expected based on the Smoluchowski equation. In addition, lambda values of 10.1 kcal/mol and 16.3 kcal/mol for BMIM-PF(6) and OMIM-PF(6), respectively, have been determined.
authors.affiliation: Department of Chemistry and Biochemistry, University of Maryland at College Park, College Park, Maryland 20742, USA.
authors.forename: Rebecca C
authors.initials: RC
authors.lastname: Vieira
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Falvey
mesh_terms: D000873:Anthracenes / Q000737:chemistry; D004583:Electrons; D005453:Fluorescence; D007093:Imidazoles / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D008856:Microscopy, Fluorescence / Q000379:methods; D015394:Molecular Structure; D009570:Nitriles / Q000737:chemistry; D010084:Oxidation-Reduction; D010777:Photochemistry; D012680:Sensitivity and Specificity; D013696:Temperature; D014783:Viscosity
chemical_list: C412621:1-butyl-3-methylimidazolium hexafluorophosphate; C446740:1-octyl-3-methylimidazolium hexafluorophosphate; C521244:9,10-dicyanoanthracene; D000873:Anthracenes; D007093:Imidazoles; D052578:Ionic Liquids; D009570:Nitriles