An efficient fluorescence sensor for superoxide with an acridinium ion-linked porphyrin triad

Hiroaki Kotani, Kei Ohkubo, Maxwell J. Crossley, Shunichi Fukuzumi

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Addition of potassium superoxide with 18-crown-6 ether (KO2 •- - 18-crown-6) to a toluene solution of an acridinium ion-linked porphyrin triad (Acr+ - H2P - Acr+) resulted in a remarkable enhancement of the fluorescence intensity. Thus, Acr+ - H2P - Acr+ acts as an efficient fluorescence sensor for superoxide. Electron transfer from KO2 • - - 18-crown-6 to the Acr+ moiety to produce the two-electron-reduced species (Acr - H2P - Acr ) results in inhibition of the fluorescence quenching via photoinduced electron transfer, as revealed by laser flash photolysis measurements.

Original languageEnglish
Pages (from-to)11092-11095
Number of pages4
JournalJournal of the American Chemical Society
Volume133
Issue number29
DOIs
StatePublished - 27 Jul 2011

Fingerprint

Dive into the research topics of 'An efficient fluorescence sensor for superoxide with an acridinium ion-linked porphyrin triad'. Together they form a unique fingerprint.

Cite this