期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 29, 页码 11092-11095出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja204161j
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [20108010, 23750014]
- KOSEF/MEST, Korea [R31-2008-000-10010-0]
- Australian Research Council [DPI092560]
- Grants-in-Aid for Scientific Research [23750014, 20108010, 20108001] Funding Source: KAKEN
Addition of potassium superoxide with 18-crown-6 ether (KO(2)(center dot-)-18-crown-6) to a toluene solution of an acridinium ion-linked porphyrin triad (Acr(+)-H(2)P-Acr(+)) resulted in a remarkable enhancement of the fluorescence intensity. Thus, Acr(+)-H(2)P-Acr(+) acts as an efficient fluorescence sensor for superoxide. Electron transfer from KO(2)(center dot-)-18-crown-6 to the Acr(+) moiety to produce the two-electron-reduced species (Acr(center dot)-H(2)P-Acr(center dot)) results in inhibition of the fluorescence quenching via photoinduced electron transfer, as revealed by laser flash photolysis measurements.
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