Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 121, Issue 28, Pages 5257-5266Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.7b03036
Keywords
-
Funding
- National Aeronautics and Space Administration [NNX12AG77G]
- National Science Foundation [CHE-1301305]
- CNSI
- MRL: an NSF MRSEC [DMR-1121053]
- NSF [CNS-0960316]
- Center for Scientific Computing
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1301305] Funding Source: National Science Foundation
Ask authors/readers for more resources
Here we present the excited state dynamics of jet-cooled 6-thioguanine (6-TG), using resonance-enhanced multiphoton ionization (REMPI), IR-UV double resonance spectroscopy, and pump-probe spectroscopy in the nanosecond and picosecond time domains. We report data on two thiol tautomers, which appear to have different excited state dynamics. These decay to a dark state, possibly a triplet state, with rates depending on tautomer form and on excitation wavelength, with the fastest rate on the order of 10(10) s(-1). We also compare 6-TG with 9-enolguanine, for which we observed decay to a dark state with a 2 orders of magnitude smaller rate. At increased excitation energy (similar to+500 cm(-1)) an additional pathway appears for the predominant thiol tautomer. Moreover, the excited state dynamics for 6-TG thiols is different from that recently predicted for thiones.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available