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Hole‐Burning Spectra of m ‐Fluorophenol/Ammonia (1:3) Clusters and Their Excited State Hydrogen Transfer Dynamics
Author(s) -
Tsuji Norihiro,
Ishiuchi Shunichi,
Jouvet Christophe,
DedonderLardeux Claude,
Miyazaki Mitsuhiko,
Sakai Makoto,
Fujii Masaaki
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100102
Subject(s) - chemistry , isomerization , excited state , photochemistry , picosecond , reaction dynamics , metastability , spectroscopy , ion , hydrogen bond , molecule , catalysis , atomic physics , laser , biochemistry , physics , organic chemistry , quantum mechanics , optics
Hole‐burning spectra of m ‐fluorophenol/ammonia (1:3) clusters are measured by four‐color UV‐near IR‐UV‐UV hole‐burning spectroscopy. Cis and trans isomers of the cluster are clearly distinguished in the (1:3) cluster. Picosecond time evolutions of the excited state hydrogen transfer (ESHT) reaction in the (1:3) clusters are measured by the ion depletion due to 3p–3s Rydberg transition of reaction products ⋅NH 4 (NH 3 ) 2 lying in the near infrared region. From the wavelength dependence of the time evolution, we have concluded 1) the initial formation of a metastable ⋅NH 4 –NH 3 –NH 3 radical and 2) successive isomerization to the most stable NH 3 –⋅NH 4 –NH 3 radical in both cis and trans isomers. The reaction lifetimes of ESHT are determined by the rate equation analysis as 32.4 and 31.8 ps for the cis and trans isomer, respectively, and the isomerization and its back‐reaction lifetime of both isomers are determined to be 3.3 ps and 11.2 ps. The almost same reaction rates are consistent with the similarity of the hydrogen bond networks in both clusters.