Highly sensitive salicylic fluorophore for visual detection of picomole amounts of Cu2+

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Publication Details

Author list: Niamnont N., Kimpitak N., Tumcharern G., Rashatasakhon P., Sukwattanasinitt M.

Publisher: Royal Society of Chemistry

Publication year: 2013

Journal: RSC Advances (2046-2069)

Volume number: 3

Issue number: 47

Start page: 25215

End page: 25220

Number of pages: 6

ISSN: 2046-2069

eISSN: 2046-2069

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887841689&doi=10.1039%2fc3ra44239j&partnerID=40&md5=3278dc103311aad5f14716a6987b6f23

Languages: English-Great Britain (EN-GB)

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Abstract

Four new fluorophores containing multiple fluorogenic branches of phenylene-ethynylene and salicylic acid Cu2+ binding sites are synthesized and evaluated as Cu2+ sensors in aqueous media. The fluorophore, F4, having a triphenylamine core and three fluorogenic branches, possesses superior sensitivity, selectivity and emission properties for fluorescence quenching detection of Cu2+. This fluorophore exhibits the highest Cu2+ quenching sensitivity in aqueous solution; K sv = 5.79 ื 106 M-1. The relatively high fluorescence emission of this fluorophore provides excellent visual contrast in a solid state paper-based sensor that enables naked eye detection of Cu 2+ at the picomole level. ฉ The Royal Society of Chemistry.

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