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

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

Journal of the American Chemical Society (2011-06-28)
Hiroaki Kotani, Kei Ohkubo, Maxwell J Crossley, Shunichi Fukuzumi
ABSTRACT

Addition of potassium superoxide with 18-crown-6 ether (KO(2)(•-)-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)(•-)-18-crown-6 to the Acr(+) moiety to produce the two-electron-reduced species (Acr(•)-H(2)P-Acr(•)) results in inhibition of the fluorescence quenching via photoinduced electron transfer, as revealed by laser flash photolysis measurements.

MATERIALS
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Product Description

Sigma-Aldrich
18-Crown-6, 99%
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5 g
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MXP 1,164.00
25 g
1 Available to ship on January 02, 2025
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MXP 3,158.00
Sigma-Aldrich
18-Crown-6, ≥99.0%
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1 g
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MXP 1,847.00
Sigma-Aldrich
18-Crown-6, purum, ≥99.0% (GC)
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5 g
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MXP 1,128.00
25 g
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MXP 5,255.00
100 g
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MXP 15,230.00
Sigma-Aldrich
18-Crown-6 solution, 1.0 M in THF
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25 mL
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MXP 5,108.00