Rhodamine-based molecular clips for highly selective recognition of Al3+ ions: synthesis, crystal structure and spectroscopic properties

被引：88

作者：

Dhara, Anamika ^{[1
]}

Jana, Atanu ^{[1
]}

Guchhait, Nikhil ^{[1
]}

Ghosh, Prasanta ^{[2
]}

Kar, Susanta K. ^{[1
]}

机构：

[1] Univ Calcutta, Univ Coll Sci, Dept Chem, Kolkata 700009, India

[2] RK Mission Residential Coll, Dept Chem, Kolkata 103, India

来源：

NEW JOURNAL OF CHEMISTRY | 2014年 / 38卷 / 04期

关键词：

FLUORESCENT CHEMOSENSOR; TURN-ON; ALUMINUM; SENSORS; MECHANISMS; INDICATORS; COUMARIN; DESIGN;

D O I：

10.1039/c3nj01447a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel fluorescent chemosensor based on a rhodamine derivative (L) was designed, synthesized, and used as a selective Al+3 ion sensor. Upon addition of Al3+ to an aqueous-acetonitrile solution of L, the development of a strong fluorescence signal by a chelation-enhanced fluorescence (CHEF) process was observed with an attractive glowing orange emission. This sensor shows high selectivity towards Al3+ ions in the presence of other competing metal ions. The fluorescence quantum yield of L-Al3+ (Phi(f) = 0.30) was found to be very high compared to the bare ligand. The limit of detection (LOD) of Al3+ ions was calculated to be 2 x 10(-8) M by fluorescence titration. The 1 : 1 binding stoichiometry of the metal complex was established by combined UV-vis, fluorescence and TOF-MS spectroscopy.

引用

页码：1627 / 1634

页数：8

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