Photoinduced Electron-Transfer Reactions in Two Room-Temperature Ionic Liquids:  1-Butyl-3-methylimidazolium Hexafluorophosphate and 1-Octyl-3-methylimidazolium Hexafluorophosphate

Photoinduced electron transfer in two room-temperature ionic liquids, 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF6) and 1-octyl-3-methylimidazolium hexafluorophosphate (OMIM-PF6), has been investigated using steady-state fluorescence quenching of 9,10-dicyanoanthracene with a series of...

Full description

Saved in:
Bibliographic Details
Published in:The journal of physical chemistry. B 2007-05, Vol.111 (18), p.5023-5029
Main Authors: Vieira, Rebecca C, Falvey, Daniel E
Format: Article
Language:English
Subjects:
Anthracenes - chemistry
Electrons
Fluorescence
Imidazoles - chemistry
Ionic Liquids - chemistry
Microscopy, Fluorescence - methods
Molecular Structure
Nitriles - chemistry
Oxidation-Reduction
Photochemistry
Sensitivity and Specificity
Temperature
Viscosity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Photoinduced electron transfer in two room-temperature ionic liquids, 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF6) and 1-octyl-3-methylimidazolium hexafluorophosphate (OMIM-PF6), 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 (λ) 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, λ values of 10.1 kcal/mol and 16.3 kcal/mol for BMIM-PF6 and OMIM-PF6, respectively, have been determined.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp0630471