Facile synthesis of rhodamine-based highly sensitive and fast responsive colorimetric and off-on fluorescent reversible chemosensors for Hg2+: preparation of a fluorescent thin film sensor

被引：53

作者：

Kaewtong, Chatthai ^{[1
,2
]}

Wanno, Banchob ^{[1
,2
]}

Uppa, Yuwaporn ^{[3
]}

Morakot, Nongnit ^{[1
,2
]}

Pulpoka, Buncha ^{[4
]}

Tuntulani, Thawatchai ^{[4
]}

机构：

[1] Mahasarakham Univ, Fac Sci, Dept Chem, Supramol Chem Res Unit, Maha Sarakham 44150, Thailand

[2] Mahasarakham Univ, Fac Sci, Ctr Excellence Innovat Chem, Maha Sarakham 44150, Thailand

[3] Rajamangala Univ Technol, Fac Engn, Dept Chem, Khon Kaen 40000, Thailand

[4] Chulalongkorn Univ, Fac Sci, Dept Chem, Supramol Chem Res Unit, Bangkok 10330, Thailand

来源：

DALTON TRANSACTIONS | 2011年 / 40卷 / 46期

关键词：

RECOGNITION PREFERENCE; RECEPTOR; PROBE; IONS; CHEMODOSIMETER; SPIROLACTAM; FRET;

D O I：

10.1039/c1dt11307k

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Fluorescence-active chemosensors (L1-L4), comprising a rhodamine scaffold and a pseudo azacrown cation-binding subunit, have been proposed and characterized as a fluorescent chemosensor for Hg2+. An on-off type fluorescent enhancement was observed by the formation of the ring-opened amide form of the rhodamine moiety, which was induced by the interactions between Hg2+ and the chemosensor. Upon the addition of Hg2+, an overall emission change of 350-fold was observed, and the selectivity was calculated to be 300 times higher than Cu2+ for receptors L2-L4. A polymeric thin film can be obtained by doping poly(methyl methacrylate) or PMMA with chemosensor L2. Such a thin film sensor can be used to detect Hg2+ with high sensitivity and can be recovered using diluted NaOH.

引用

页码：12578 / 12583

页数：6

共 33 条

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