Picosecond infrared study of vibrational dependent electron transfer rates
- Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
Photoinduced electron transfer and thermal back electron transfer in the inorganic donor-acceptor {l_brace}A{sup +}D{sup {minus}}{r_brace} contact ion-pair {l_brace}Cp{sub 2}Co{sup +}{vert_bar}Co(CO){sub 4}{sup {minus}}{r_brace} have been observed in solution with picosecond time-resolved infrared absorption spectroscopy. Optical excitation of a charge transfer band created by cobalt interaction causes an immediate electron transfer to form a neutral pair, and the spontaneous return electron transfer is followed by monitoring the CO stretching frequencies of the Co(CO){sub 4}{sup {minus}} and Co(CO){sub 4} molecules. The authors have observed the back electron transfer decay for up to 3 quanta of the CO stretching mode in the neutral pair {l_brace}DA{r_brace} for dichloromethane (DCM) solvent. The arrival kinetics into the ion pair and ion pair vibrational relaxation rates for final return to the vibrationless level have been studied for up to 4 quanta of vibration. These are the first measurements of an electron transfer process with vibrational resolution, and comparison to models is in progress.
- DOE Contract Number:
- FG02-91ER14228
- OSTI ID:
- 390199
- Report Number(s):
- CONF-940121-; ISBN 0-8194-1433-6; TRN: IM9646%%484
- Resource Relation:
- Conference: Superconducting superlattices and multilayers and oxide superconductory physics and nanoengineering, Los Angeles, CA (United States), 23-28 Jan 1994; Other Information: PBD: 1994; Related Information: Is Part Of Longer wavelength lasers and applications; Patonay, G. [ed.]; PB: 279 p.; Proceedings/SPIE, Volume 2138
- Country of Publication:
- United States
- Language:
- English
Similar Records
Models for quantum effects in electron transfer: Co(Cp){sub 2}{sup +}{vert_bar}V(CO){sub 6}{sup {minus}}
Electron transfer of carbonylmetalate radical pairs: femtosecond visible spectroscopy of optically excited ion pairs