Fluorescence photoswitching based on a photochromic pKa change in an aqueous solution

Tuyoshi Fukaminato; Emi Tateyama; Nobuyuki Tamaoki

doi:10.1039/C2CC35889A

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Chemical Communications

Issue 88, 2012

Urgent high quality communications from across the chemical sciences.

Impact Factor 6.169 100 Issues per Year Indexed in MEDLINE

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Fluorescence photoswitching based on a photochromic pK_a change in an aqueous solution

Tuyoshi Fukaminato,*^a Emi Tateyama^a and Nobuyuki Tamaoki*^a

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Research Institute for Electronic Science, Hokkaido University, N20, W10, Kita-ku, Japan
E-mail: tuyoshi@es.hokudai.ac.jp ;
Fax: +81-11-706-9350 ;
Tel: +81-11-706-9350

Chem. Commun., 2012,48, 10874-10876

DOI: 10.1039/C2CC35889A
Received 15 Aug 2012, Accepted 19 Sep 2012
First published online 21 Sep 2012

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Reversible fluorescence photoswitching of RSA-AZO dyad 1 was clearly demonstrated in an acidic aqueous solution. The fluorescence photoswitching mechanism is based on the reversible ring opening/closing reactions of the RSA unit induced by a photochromic pK_a change along with the photoisomerization of the AZO unit.

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Fluorescence photoswitching based on a photochromic pK_a change in an aqueous solution