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Issue 4, 2014
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Rhodamine-based molecular clips for highly selective recognition of Al3+ ions: synthesis, crystal structure and spectroscopic properties

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Abstract

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+ (Φf = 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 × 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.

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

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Publication details

The article was received on 20 Nov 2013, accepted on 30 Jan 2014 and first published on 30 Jan 2014


Article type: Paper
DOI: 10.1039/C3NJ01447A
Author version available: Download Author version (PDF)
Citation: New J. Chem., 2014,38, 1627-1634
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    Rhodamine-based molecular clips for highly selective recognition of Al3+ ions: synthesis, crystal structure and spectroscopic properties

    A. Dhara, A. Jana, N. Guchhait, P. Ghosh and S. K. Kar, New J. Chem., 2014, 38, 1627
    DOI: 10.1039/C3NJ01447A

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