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Multifunctional fluorescent probe selective for Cu(II) and Fe(III) with dual-mode of binding approach
S DALAPATI, S JANA, M A ALAM,
Published in ELSEVIER SCIENCE SA
2011
Volume: 160
   
Issue: 1
Pages: 1106 - 1111
Abstract
Unsymmetrical azine Schiff base 5-diethylamino-2-[(4-diethylamino- benzylidene)-hydrazonomethyl]-phenol (receptor 1) having multiple binding sites (-NEt2 and -OH group) have been synthesized. The receptor 1 exhibits color change from light yellow to purple and bright yellow in presence of Cu2+ ion and Fe3+ ion, respectively which is detectable by naked-eye. But it shows red color in presence of mixture of all metal ions. The UV-vis spectral investigation of receptor 1 shows a remarkable spectral shift from 410 nm to 527, 572 and 620 nm in presence of Cu2+ ion and 485 nm in presence of Fe3+ ion in acetonitrile solvent. Interestingly, Cu2+ ions generates a new charge transfer emission band at 532 nm in the expense of local emission of receptor at 480 nm, but Fe3+ ion only quenched the local emission. The spectral response of receptor is almost insignificant in presence of other metal ions (Mn2+, Zn2+, Co2+, Ni2+, Cd2+, Hg2+, Li + and Na+ ions). © 2011 Elsevier B.V. All rights reserved.
About the journal
JournalData powered by TypesetSensors and Actuators, B: Chemical
PublisherData powered by TypesetELSEVIER SCIENCE SA
ISSN0925-4005
Open AccessNo