Copper ion sensing with fluorescent electrospun nanofibers

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Merve Zeyrek OngunAslihan Suslu

Abstract

In this work, the use of electrospun nanofibrous materials as highly responsive fluorescence quenching-based copper sensitive chemosensor is reported. Poly(methyl methacrylate) and ethyl cellulose were used as polymeric support materials. Sensing slides were fabricated by electrospinning technique. Copper sensors based on the change in the fluorescence signal intensity of fluoroionophore; N'-3-(4-(dimethylamino phenly)allylidene)isonicotinohydrazide. The sensor slides exhibited high sensitivities due to the high surface area of the nanofibrous membrane structures. The preliminary results of Stern-Volmer analysis show that the sensitivities of electrospun nanofibrous membranes to detect Cu(II) ions are 6-20-fold higher than those of the continuous thin films. By this way we obtained linear calibration plots for Cu(II) ions in the concentration range of 10(-12)-10(-5)M. The response times of the sensing slides were less than 1 min. Stability of the employed ionophore in the matrix materials was excellent and when stored in the ambient air of the laboratory there was no significant drift in signal intensity after 6 months. Our stability tests are still in progress.

Citations

Jul 12, 2014·Annual Review of Analytical Chemistry·Günter MistlbergerEric Bakker
Feb 3, 2016·Applied Optics·Cheng-Shane Chu, Chih-Yung Chuang
May 1, 2016·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Shujuan ZhangYu Fang
Aug 16, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Sibel KacmazErdal Celik
Dec 12, 2017·ChemistryOpen·Meng LiTony D James
Nov 27, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Raphael C L MachadoAnd Frederico B De Sousa
Dec 30, 2016·Journal of Fluorescence·Nader ShehataMohammed Salah

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