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A Schiff Base and Its Copper(II) Complex as a Highly Selective Chemodosimeter for Mercury(II) Involving Preferential Hydrolysis of Aldimine over an Ester Group

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Title A Schiff Base and Its Copper(II) Complex as a Highly Selective Chemodosimeter for Mercury(II) Involving Preferential Hydrolysis of Aldimine over an Ester Group
 
Creator KUMAR, A
DUBEY, M
PANDEY, R
GUPTA, RK
KUMAR, A
KALITA, AC
PANDEY, DS
 
Subject CRYSTAL-STRUCTURE
AQUEOUS-MEDIA
METAL IONS
HG2+ IONS
FLUORESCENT
SENSOR
METHYLMERCURY
CHEMOSENSOR
ENVIRONMENT
DERIVATIVES
 
Description The syntheses of a new Schiff base, diethyl-5-(2-hydroxybenzylidene)aminoisophthalate (HL), and a copper complex, [Cu(L-2)] (1), imparting L, have been described. Both the ligand HL and complex 1 have been thoroughly characterized by elemental analyses, electrospray ionization mass spectrometry, FT-IR, NMR (H-1 and C-13), electronic absorption, and emission spectral studies and their structures determined by X-ray single-crystal analyses. Distinctive chemodosimetric behavior of HL and 1 toward Hg2+ has been established by UV/vis, emission, and mass spectral studies. Comparative studies further revealed that the chemodosimetric response solely originates from selective hydrolysis of the aldimine moiety over the ester group and 1 exhibited greater selectivity toward Hg2+ relative to HL while the sensitivity order is reversed. Further, these followed different hydrolytic pathways but ended up with the same product analyzed for diethyl-5-aminoisophthalate (DEA). Hg2+-induced displacement of Cu2+ and subsequent hydrolysis of the -HC=N-moiety in 1 affirmed the identity of the actual species undergoing hydrolysis as HL. The occurrence of Cu2+ displacement and Hg2+ detection via hydrolytic transformation has been supported by various physicochemical studies.
 
Publisher AMER CHEMICAL SOC
 
Date 2014-12-28T12:27:06Z
2014-12-28T12:27:06Z
2014
 
Type Article
 
Identifier INORGANIC CHEMISTRY, 53(10)4944-4955
0020-1669
1520-510X
http://dx.doi.org/10.1021/ic403149b
http://dspace.library.iitb.ac.in/jspui/handle/100/16518
 
Language English