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Issue 33, 2018
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Single sensors for multiple analytes employing fluorometric differentiation for Cr3+ and Al3+ in semi-aqueous medium with bio-activity and theoretical aspects

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Abstract

The structurally characterized (through single crystal X-ray diffraction) Schiff base ligand N,N′-bis(4-methoxy-salicylaldehyde)azine (H2SALNN) exhibits poor fluorescence in the excited state, due to rotational (cis/trans) isomerization along the azomethine group. However, in the presence of Cr3+ and Al3+ the isomerization is blocked due to coordination with the metal ions exhibiting turn-on fluorescence. The fluorescence enhancement for Al3+ and Cr3+ at two distinct wavelengths shows much difference of the wavelengths (ΔI = 63 nm). Thus, the selective turn-on fluorescence behaviour of H2SALNN for Cr3+ and Al3+ is based on the blocking effect of C[double bond, length as m-dash]N isomerization and chelation-enhanced fluorescence (CHEF). The coordination modes of the complexes were investigated by spectroscopic and computational studies.

Graphical abstract: Single sensors for multiple analytes employing fluorometric differentiation for Cr3+ and Al3+ in semi-aqueous medium with bio-activity and theoretical aspects

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Publication details

The article was received on 13 May 2018, accepted on 09 Jul 2018 and first published on 10 Jul 2018


Article type: Paper
DOI: 10.1039/C8AY01080C
Citation: Anal. Methods, 2018,10, 4063-4072
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    Single sensors for multiple analytes employing fluorometric differentiation for Cr3+ and Al3+ in semi-aqueous medium with bio-activity and theoretical aspects

    M. Dolai, U. Saha, A. K. Das and G. Suresh Kumar, Anal. Methods, 2018, 10, 4063
    DOI: 10.1039/C8AY01080C

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