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A New Fluorescent “Off-On” Sensor for Al3+ Derived from L-alanine and Salicylaldehyde

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Abstract

The condensation product of L-alanine and salicylaldehyde was synthesised and characterised which was found to be selective fluorescent “on” sensor for Al3+ ion with the detection limit 10−6 M. The sensor is free of interferences from metal ions - Na+, K+, Ca2+, Mn2+, Co2+, Ni2+, Cu2+, Pb2+, Cd2+, Hg2+ and Fe3+. The Fluorescence and the UV/visible spectral data reveals a 1:1 interaction between the sensor and Al3+ ion with binding constant 104.5. The DFT and TDDFT calculations confirm the structures of the sensor and the sensor-Al3+ complex.

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Acknowledgments

DST, New Delhi and UGC, New Delhi are thanked for financial support to the department through FIST-II and SAP respectively.

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Authors and Affiliations

  1. Department of Chemistry, Gauhati University, Guwahati, Assam, 781 014, India

    Smita Sarma & Diganta Kumar Das

  2. Department of Chemistry, Arya Vidyapeeth College, Guwahati, Assam, 781 016, India

    Pradip Kr. Bhattacharyya

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  1. Smita Sarma
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  2. Pradip Kr. Bhattacharyya
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  3. Diganta Kumar Das
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Correspondence to Diganta Kumar Das.

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Sarma, S., Bhattacharyya, P.K. & Das, D.K. A New Fluorescent “Off-On” Sensor for Al3+ Derived from L-alanine and Salicylaldehyde. J Fluoresc 25, 1537–1542 (2015). https://doi.org/10.1007/s10895-015-1647-5

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  • DOI: https://doi.org/10.1007/s10895-015-1647-5

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