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High‐Performance Oxygen Sensors Based on Eu III Complex/Polystyrene Composite Nanofibrous Membranes Prepared by Electrospinning
Author(s) -
Wang Yinghui,
Li Bin,
Zhang Liming,
Zuo Qinghui,
Li Peng,
Zhang Jun,
Su Zhongmin
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201000884
Subject(s) - electrospinning , oxygen sensor , polystyrene , membrane , scanning electron microscope , luminescence , oxygen , analytical chemistry (journal) , quenching (fluorescence) , materials science , singlet oxygen , oxygen permeability , composite number , absorption (acoustics) , chemical engineering , fluorescence , chemistry , polymer , composite material , optics , organic chemistry , optoelectronics , engineering , biochemistry , physics
An optical oxygen sensor based on an Eu III 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 ( I N2 / I O2 ) 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 Eu III 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.