High-performance oxygen sensors based on EuIII complex/polystyrene composite nanofibrous membranes prepared by electrospinning

Document Type

Article

Publication Date

2-7-2011

Abstract

An optical oxygen sensor based on an EuIII complex/polystyrene (PS) composite nanofibrous membrane is prepared by electrospinning. The emission intensity of [Eu(TTA)3(phencarz)] (TTA=2-thenoyltrifluoroacetonate, phencarz=2-(N-ethylcarbazolyl-4)imidazo[4,5-f]1,10-phenanthroline) decreases with increasing oxygen concentration, and thus the [Eu(TTA)3 (phencarz)]/PS composite nanofibrous membranes can be used as an optical oxygen-sensing material based on emission quenching caused by oxygen. Elemental analysis, UV/Vis absorption spectra, scanning electron microscopy (SEM), fluorescence microscopy, luminescence-intensity quenching Stern-Volmer plots, and excited-state decay analysis are used to characterize the obtained oxygen-sensing materials. A high sensitivity (IN2/IO2) of 3.38 and short response and recovery times (t↓=5.0, t ↑=8.0 s) are obtained. These results are the best values reported for oxygen sensors based on EuIII complexes. The high surface area-to-volume ratio and porous structure of the electrospun nanofibrous membranes are taken to be responsible for the outstanding performance. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Publication Source (Journal or Book title)

ChemPhysChem

First Page

349

Last Page

355

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