Selective recognition of Cu (II) and Fe (III) using a pyrene based chemosensor.
A pyrene-based colorimetric chemosensor 1-(pyren-1-yl)-N,N-bis-(pyridine-2-ylmethyl)methanamine (1) was synthesised for selective detection of Cu (II) and Fe (III) over the other metal cations Ni2+, Mg2+, Cd2+, Hg2+, Na+, K+, Ca2+, Co2+, Cr3+, Pb2+and Zn2+. The significant changes in UV-vis absorption band of receptor 1 and the emergence of 660nm band in presence of Cu2+ion indicates the selective binding of Cu2+ion as compared to other metal cations which could easily be identified from the naked eye strong colour change. Job plots suggest a 1:1 and 2:1 stoichiometric binding of Cu2+and Fe3+, respectively, which was evidenced by ESI-MS analysis. Chemosensor 1 explores a cost-effective and selective colorimetric sensor for naked eye detection of trace amount of Cu2+and Fe3+ions in presence of other metal cations.
Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
Daulat
D
Phapale
Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
Akshay
A
Gaikwad
Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India. Electronic address: dr.das@ictmumbai.edu.in.
Dipanwita
D
Das
Chemosensor; Chromogenic receptor; Colorimetric; Cu (II), Fe (III); Pyrene-dipicolylamine