Publication: Fluorescent Chemosensor for Cu2+ based on Schiff base-naphthalene-2-ol
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Issued Date
2017
Resource Type
File Type
application/pdf
ISSN
22147853
Other identifier(s)
2-s2.0-85028378433
Rights Holder(s)
Scopus
Bibliographic Citation
Materials Today: Proceedings. Vol 4, No.5 (2017), p.6022-6030
Suggested Citation
Aussawaponpaisan P., Nusuwan P., Tongraung P., Jittangprasert P., Pumsa-Ard K., Kuno M. Fluorescent Chemosensor for Cu2+ based on Schiff base-naphthalene-2-ol. Materials Today: Proceedings. Vol 4, No.5 (2017), p.6022-6030. doi:10.1016/j.matpr.2017.06.089 Retrieved from: https://hdl.handle.net/20.500.14740/4551
Abstract
Schiff base-naphthalene-2-ol (L), a novel fluorescent chemosensor, was designed and synthesized. The molecule contains both the Schiff base and hydroxyl as the metal binding sites, and 6-nitronaphthalene moiety as a signaling unit. The binding properties for various cations (Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+ and Cd2+) of L were examined by using UV-Vis spectrophotometry and Fluorescence spectroscopy. UV-Vis absorption of L selectively bound with Cu2+ at 419 nm was decreased and the absorption at 303 nm was increased after binding, whereas the change of UV-Vis spectra of L in the presence of other cations was not observed. The stoichiometry of the complex was found to be 1:1 based on the Job plot, and the association constant for L-Cu2+ was determined to be 1.4 x 105 M-1. The quantum mechanical calculations using B3LYP/6-311G(d,p) supported the complexation between L and Cu2+. Addition of Cu2+ showed selective fluorescence quenching of the receptor L in DMSO with the detection limit of 0.65 μM. The Fluorescence intensity was linearly related with Cu2+concentration ranging from 0.64-8.57 μM (r2 = 0.9941). © 2017 Elsevier Ltd. All rights reserved.