标题：Functionalized polysilsesquioxane film fluorescent sensors for sensitive detection of polychlorinated biphenyls
作者：Chen, Weikai; Qi, Feng; Li, Chunxiao; Cao, Jiaojie; Li, Zhengqiang; Dou, Jintao; Bei, Yiling; Zhan, Jinhua; Zhu, Qingzeng
作者机构：[Chen, Weikai; Li, Chunxiao; Cao, Jiaojie; Li, Zhengqiang; Dou, Jintao; Bei, Yiling; Zhan, Jinhua; Zhu, Qingzeng] Shandong Univ, Sch Chem & Chem Engn, 更多
通讯作者地址：[Qi, F]Shandong Univ, Qilu Hosp, Dept Anesthesiol & Pain Clin, Jinan 250012, Peoples R China.
来源：JOURNAL OF ORGANOMETALLIC CHEMISTRY
关键词：Polychlorinated biphenyls (PCB); Polysilsesquioxane; Diphenylamine;; Fluorescence quenching; Sensor
摘要：Development of a rapid, highly sensitive and simple technique for screening polychlorinated biphenyls (PCBs) remains a challenge. In the present study, a novel fluorescent film chemosensor for PCBs based on fluorescence quenching was designed and synthesized. The fluorescent chemosensor is a hybrid organic einorganic functionalized polysilsesquioxane film that is prepared from gamma-(N,N-diphenylcarbamino) propyltriethoxysilane by sol-gel polymerization. The prepared fluorescent polysilsesquioxane film with diphenylamine as a fluorescent probe is sensitive to aqueous solutions of PCBs, including 2-chlorobiphenyl (PCB1), 2,2'-Dichlorobiphenyl (PCB4), 2,2',5-trichlorobiphenyl (PCB18), 3,3',4,4'-tetrachlorobiphenyl (PCB77) and 2,2',4,5,5'-pentachlorobiphenyl (PCB101). PCBs efficiently quench the fluorescence of the chemosensor via a photo-induced electron transfer (PET) process. The fluorescence emission intensity of the polysilsesquioxane film sensor decreased steadily with a corresponding increase in PCBs. The detection limit of PCB77 was found to be 8.03 x 10(-7) M. The obtained results show that this fluorescent sensor has good thermal stability, high sensitivity and satisfactory reversibility in PCBs sensing. (C) 2013 Elsevier B. V. All rights reserved.