Abstract
The fluorescence intensity of salicylaldehyde phenylhydrazone (L), in 1:1 (v/v) CH3OH:H2O was enhanced by ca. 100 times with a blue shift in emission maximum, on interaction with Pb2+ ion. No enhancement in fluorescent intensity of L was observed on interaction with metal ions - Na+, K+, Ca2+, Cu2+, Ni2+, Zn2+, Cd2+ and Hg2+. This signal transduction was found to occur via photoinduced electron transfer (PET) mechanism. A 1:1 complexation between Pb2+ and L with log β = 7.86 has been proved from fluorescent and UV/Visible spectroscopic data. The detection limit of Pb2+ was calculated to be 6.3 × 10−7 M.
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Acknowledgment
UGC, New Delhi and DST, New Delhi are thanked for financial support to the Department. PG thanks the former for fellowship under RFSMS.
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Das, D.K., Goswami, P. & Sarma, S. Salicylaldehyde Phenylhydrazone: A New Highly Selective Fluorescent Lead (II) Probe. J Fluoresc 23, 503–508 (2013). https://doi.org/10.1007/s10895-013-1167-0
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DOI: https://doi.org/10.1007/s10895-013-1167-0