Receptor-Free Poly(phenylenevinylene) Fibrous Membranes for Cation Sensing: High Sensitivity and Good Selectivity Achieved by Choosing the Appropriate Polymer Matrix
writer：Jing Song, Wei Zhang, Kesong Miao, Hongling Zeng, Si Cheng, and Li-Juan Fan*
keywords：poly(phenylenevinylene)，electrospinning，receptor-free，fluorescence，sensing
source：期刊
specific source：ACS Appl. Mater. Interfaces, 2013, 5 (10), pp 4011–4016
Issue time：2013年
Poly(phenylenevinylene)/polyimide (PPV/PI) and poly(phenylenevinylene)/ polymethylmethacrylate (PPV/PMMA) fibrous membranes without any deliberately introduced receptors were prepared as fluorescence sensing materials through electrospinning, followed by thermal treatment. Both of these membranes displayed higher sensitivity toward most cations compared to the corresponding spincoated films. PPV/PMMA membranes were more sensitive than PPV/PI membranes toward Cu2+ and Fe3+. About 4.5 fold of intensity enhancement upon 20 nM of Cu2+, 80% of quenching upon 20 nM of Fe3+ with fast response and simple regeneration were realized for PPV/PMMA membrane. The preliminary investigation into the mechanism revealed that the properties of the polymer matrix and thermal treatment of the embrane played important roles in the sensing performance.