Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 138, Issue -, Pages 99-104Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2014.11.030
Keywords
Fluorescence; Sensor; Colorimetric; Copper(II); pi-Cation; DFT
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Funding
- DST, New Delhi
- UGC, New Delhi
- MoEF, New Delhi
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Schiff base derived from naphthylamine and benzil (L) binds to two Cu2+ ions, one by coordination through N of the Schiff base and another by pi cation interaction through benzil rings. This bonding pattern determined by DFT calculation has been proved by matching electronic spectrum obtained from TDDFT calculation to the experimental one. L acts as on-off fluorescent and bare eye detectable colorimetric (purple color) sensor for Cu2+ ion over the metal ions - Na+, K+, Ca2+ Mn2+, Co2+ Ni2+, Zn2+, Pb2+, Cd2+, Hg2+, Ag+, Hg2+ and Al3+ in 1:1 v/v CH3CN:H2O. These metal ions do not interfere the fluorescent/colorimetric sensing. As fluorescent sensor the linear range of detection is 5 x 10(-5) to 3 x 10(-4) M and detection limit 10(-5) M. (C) 2014 Elsevier B.V. All rights reserved.
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