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

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

doi:10.1021/ja204161j

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

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

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

30 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 language	English
Pages (from-to)	11092-11095
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	133
Issue number	29
DOIs	https://doi.org/10.1021/ja204161j
State	Published - 27 Jul 2011

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title = "An efficient fluorescence sensor for superoxide with an acridinium ion-linked porphyrin triad",

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.",

author = "Hiroaki Kotani and Kei Ohkubo and Crossley, {Maxwell J.} and Shunichi Fukuzumi",

year = "2011",

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T1 - An efficient fluorescence sensor for superoxide with an acridinium ion-linked porphyrin triad

AU - Kotani, Hiroaki

AU - Ohkubo, Kei

AU - Crossley, Maxwell J.

AU - Fukuzumi, Shunichi

PY - 2011/7/27

Y1 - 2011/7/27

N2 - 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.

AB - 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.

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

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