2002
DOI: 10.1021/jp026944n
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Coherent Vibrational Motion during the Excited-State Intramolecular Proton Transfer Reaction in o-Hydroxyacetophenone

Abstract: Excited-state intramolecular proton transfer (ESIPT) reaction dynamics in o-hydroxyacetophenone (OHAP) has been investigated in a supersonic molecular beam using femtosecond time-resolved multiphoton ionization mass spectrometry. The observed transients exhibit a biexponential decay and a rapidly damped oscillation with a period of ∼600 fs. The combinations of experimental and theoretical results suggested that the oscillation is due to a coherent vibrational motion that follows the molecular transformation fr… Show more

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Cited by 24 publications
(22 citation statements)
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“…1116 Fluorescence and phosphorescence spectroscopy of oHP derivatives confirmed that the singlet ESIPT occurs in non-polar solvents while hydrogen bonding of the 2-hydroxy moiety with protic solvent molecules prevents the singlet ESIPT and subsequently leads to the triplet state. 15 However, time-resolved EPR study of 2-hydroxyacetophenone (oHA) in ethanol suggested that singlet ESIPT precedes ISC to the triplet state.…”
Section: Introductionmentioning
confidence: 92%
“…1116 Fluorescence and phosphorescence spectroscopy of oHP derivatives confirmed that the singlet ESIPT occurs in non-polar solvents while hydrogen bonding of the 2-hydroxy moiety with protic solvent molecules prevents the singlet ESIPT and subsequently leads to the triplet state. 15 However, time-resolved EPR study of 2-hydroxyacetophenone (oHA) in ethanol suggested that singlet ESIPT precedes ISC to the triplet state.…”
Section: Introductionmentioning
confidence: 92%
“…Excited state intramolecular proton transfer (ESIPT) has been a topic of interest for some time [1,2], even more so now that femtosecond spectroscopic techniques have enabled real-time views of the reaction progress [3][4][5][6][7][8][9][10][11][12][13]. The dramatic enhancement of experimental resolution has been paralleled by a steady increase in computing power, accelerating theoretical study [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31].…”
Section: Introductionmentioning
confidence: 99%
“…Numerous studies have been carried out to reveal the photoexcited dynamics of SA in the condensed phase. [25][26][27][35][36][37][38][39][40][41][42][43] Since the quantum yield of photochromic reaction is defined as the ratio of the rate for the photochromic process to that for the other processes, the femtosecond time resolution is crucial to clarify the excited state dynamics of the photochromic compounds. The ESIPT rate and the quantum yield for the photochromic products substantially depend on the nature of the solvent molecules.…”
Section: Introductionmentioning
confidence: 99%