期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 2, 期 24, 页码 3063-3068出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz201439w
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- National Science Council, Taiwan
7-Hydroxyquinoline-8-carboxylic acid (1), which possesses dual intramolecular hydrogen bonds, undergoes excited-state intramolecular double proton transfer, (ESIDPT) resulting in a quinolinone-like tautomer emission (lambda(max) similar to 470 nm). ESIDPT of 1 is cooperative, as evidenced by chemically blocking either proton donating site. While the overall rate of ESIDPT is higher than the system response limit, (220 fs)(-1), the theoretical approach favors a concerted, asynchronous ESIDPT with a rather small or negligible barrier, demonstrating an intrinsic proton relay system that undergoes intramolecular double proton transfer in the electronic excited state.
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