writer：Xudong Yang ，Bowen Shen，Yingnan Jiang，Zixi Zhao，Chuanxi Wang, Cheng Ma，Bai Yang，Quan Lin
keywords：Polymer brushes, Photoluminscence, detection of TNT
source：期刊
Issue time：2012年
In this work, we first report the application of fluorescent polymer brushes film as a device for ultrasensitive
and selective detection of TNT. As positively charged fluorescent molecules of quaternary ammonium
tetraphenylethylene derivatives (d-TPE) were self-assembled on the brushes of poly(acrylic acid) (PAA) by
coulomb forces, we obtained a novel fluorescent polymer brushes film with excellent photoluminescent
properties, and the emission could be quantitatively and sensitively responsive to 2,4,6-trinitrotoluene
(TNT) due to the electron transfer between d-TPE and TNT. The limit of detection of TNT was
established to be 0.1 ppb in water. The fluorescent device could also be used repeatedly for TNT
detection, which indicated a promising application in trace explosive detection.