Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 222, Issue -, Pages 35-42Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.08.025
Keywords
Spiropyran; Copper ion; Chemosensor; Visual detection
Funding
- UGC-CAS
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A novel quinaldine-indole based spiropyran (QSP) with stabilized merocyanine form has been developed for colorimetric detection of Cu2+ ions. Chemosensor QSP shows high sensitivity and selectivity for Cu2+ ions amongst other metal ions (Na+, Mg2+, K+, Ca2+, Al3+, Co2+, Ni2+, Zn2+, Cd2+, Ba2+, La3+, Hg2+, Pb2+). The stoichiometry of QSP-Cu2+ complex determined by Jobs plot was found to be 1:1. The association constant for QSP-Cu2+ complex determine from Benesi-Hildbrand plot was 1.9 x 10(5) M-1 with a limit of detection 6.3 x 10(-7) M. Applicability of QSP to detect Cu2+ ions in tap water has been demonstrated, thus indicating the potential use of QSP as viable probe for visual detection of Cu2+ ions. (C) 2015 Elsevier B.V. All rights reserved.
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