期刊
JOURNAL OF PHYSICAL CHEMISTRY A
卷 113, 期 29, 页码 8195-8201出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp903460b
关键词
-
资金
- Deutsche Forschungsgemcinschaft [SFB-450]
A photoinitiated intermolecular electron-proton transfer reaction in 2-aminopyridine dimer was investigated by femtosecond pump-probe electron-ion coincidence spectroscopy and accompanying theory. Excited-state population dynamics were observed in real time by time-resolved mass spectroscopy, and the respective excited-state character of locally excited and proton/hydrogen transfer states was identified in coincident electron spectra. Two reaction channels for an ultrafast (sub-50 fis) and a slower (similar to 75 ps) proton/hydrogen transfer were observed and indicate that vibrational energy redistribution may lead to efficient population trapping in the excited state. Spectroscopic evidence of an unexpected hydrogen-transfer reaction in photoexcited aminopyridine monomer is also presented.
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