Photophysical Model of 10-Hydroxybenzo[h]quinoline: Internal Conversion and Excited State Intramolecular Proton Transfer
SCIE
SCOPUS
- Title
- Photophysical Model of 10-Hydroxybenzo[h]quinoline: Internal Conversion and Excited State Intramolecular Proton Transfer
- Authors
- Junghwa Lee; Joo, T
- Date Issued
- 2014-03-20
- Publisher
- 대한화학회
- Abstract
- Photophysics of 10-hydroxybenzo[h]quinoline (HBQ) has been in controversy, in particular, on the nature of the electronic states before and after the excited state intramolecular proton transfer (ESIPT), even though the dynamics and mechanism of the ESIPT have been well established. We report highly time resolved fluorescence spectra over the full emission frequency regions of the enol and keto isomers and the anisotropy in time domain to determine the accurate rates of the population decay, spectral relaxation and anisotropy decay of the keto isomer. We have shown that the similar to 300 fs component observed frequently in ESIPT dynamics arises from the S-2 -> S-1 internal conversion in the reaction product keto isomer and that the ESIPT occurs from the enol isomer in S-1 state to the keto isomer in S-2 state.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13584
- DOI
- 10.5012/BKCS.2014.35.3.881
- ISSN
- 0253-2964
- Article Type
- Article
- Citation
- Bulletin of the Korean Chemical Society, vol. 35, no. 3, page. 881 - 885, 2014-03-20
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