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Kwon, Oh Hoon
Ultrafast Laser Spectroscopy and Nano-microscopy (ULSaN Lab)
Research Interests
  • Femtochemistry/biology, 4D electron microscopy, structural dynamics, materials phenomena

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Migration of protons during the excited-state tautomerization of aqueous 3-hydroxyquinoline

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Title
Migration of protons during the excited-state tautomerization of aqueous 3-hydroxyquinoline
Author
Yu, HNKwon, Oh HoonJang, DJ
Issue Date
2004-07
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY A, v.108, no.28, pp.5932 - 5937
Abstract
The detailed mechanism of proton transfer and the individual catalytic roles of H 2O, H 3O +, and OH - in the excited-state tautomerization of aqueous 3-hydroxyquinoline are determined by measuring fluorescence kinetic constants as functions of wavelength, pH, hydrogen isotope, and temperature. The molecule undergoes tautomerization in a stepwise manner by forming an anionic intermediate and the tautomer on time scales of 600 and 1200 ps, respectively, in the pH region of 7-8. However, the intermediate transforms rapidly into the tautomer in the pH region of 4-6 owing to the migration of the proton concurrently formed with the intermediate. This provides experimental evidence of the idea that the extremely fast migration of protons in water occurs by continuously forming and breaking hydrogen bonds involved in hydrated proton clusters.
URI
https://scholarworks.unist.ac.kr/handle/201301/8790
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=3242888247
DOI
10.1021/jp031293w
ISSN
1089-5639
Appears in Collections:
CHM_Journal Papers
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