Journal
DALTON TRANSACTIONS
Volume 44, Issue 9, Pages 4123-4132Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4dt01433b
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Funding
- CSIR [01/2727/13/EMR-II]
- SERB, New Delhi, India [SR/S1/OC-62/2011]
- Department of Chemistry, central instrumental facility
- IIT Guwahati
- UGC, New Delhi
- Department of Biotechnology, Government of India [BT/01/NE/PS/08]
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A pyridine-2-carbohydrazide functionalized conjugated fluorophoric Schiff base ligand (L-1) specifically senses Al3+ and Cd2+ ions through significant changes in its absorption and emission spectral behavior, respectively, in physiological conditions. The spectral changes are in the visible region of the spectrum and thus facilitate naked eye detection. Apart from the visible changes, an in-field device application was demonstrated by sensing these ions in paper strips coated with L-1. The crystal structure of the L-1-Cd complex provided additional insight of the metal coordination attributes of L-1. Interestingly, fluorescence microscopic studies demonstrated that the ligand L-1 could also be used as an effective probe in imaging experiments for the detection of intracellular Cd2+ ions in HeLa cells, without any toxicity to these model human cells.
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