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Urea Based Dipodal Fluorescence Receptor for Sensing of Fe3+ Ion in Semi-Aqueous Medium

Authors:	Umesh Fegade Hemant Sharma Sanjay Attarde Narinder Singh Anil Kuwar

Institution:	1. School of Chemical Sciences, North Maharashtra University, Jalgaon, 425001, MS, India 3. School of Earth and Environmental Sciences, North Maharashtra University, Jalgaon, 425001, MS, India 2. Department of Chemistry, Indian Institute of Technology, Ropar, Rupanagar, 140001, Punjab, India

Abstract:	Urea based fluorescent chemosensor 1 was synthesized. Receptor 1 shows unique selectivity for the Fe³⁺ion and no such significant response was noticed with other metal ions (Cr³⁺, Mn²⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺, Cd²⁺, Hg²⁺, Pb²⁺ and Bi³⁺) in DMSO/H₂O (50:50,v/v) semi-aqueous solution. The binding features have been established by absorption and fluorescence spectroscopic methods. The binding constant (K) values obtained from Benesi-Hildebrand, Scatchard and Connor plot for receptor 1 is (8.3?±?0.3) × 10³ M^?1 and has good detection limit 0.7?μM. The stoichiometry of 1.Fe³⁺ complex was confirmed by mass spectroscopy and Job’s plot.

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