表面分子印迹共轭聚合物传感薄膜对2,4-DNT的选择性响应  

Surface Molecularly Imprinted Fluorescent Conjugated Polymer Films for Selective Response of 2,4-DNT

作　　者：牛庆媛 高可政[1] 吴文辉[2] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002 [2]北京理工大学材料学院,北京100081

出　　处：《高分子材料科学与工程》2018年第1期67-72,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21501154;21601162);河南省高等学校重点科研项目(16A430031);郑州轻工业学院博士科研基金(2014BSJJ059;2014BSJJ060)

摘　　要：将侧链含氨基的强电子离域性共轭聚合物(PDD)化学键合到纤维素纳米微纤(TOCN)薄膜上,利用表面分子印迹技术,制备了以2,4-二硝基甲苯(2,4-DNT)为模板的表面印迹共轭聚合物传感薄膜(MI-PDD/TOCN薄膜);并深入研究了该MI-PDD/TOCN薄膜对2,4-DNT检测的应用。研究结果显示,TNT溶液(或蒸气)对MI-PDD/TOCN薄膜的荧光猝灭常数(或荧光猝灭效率)仅为1.6×104M-1(或暴露300 s,18.2%),而2,4-DNT溶液(或蒸气)对其的荧光猝灭常数(或荧光猝灭效率)高达2.78×104M-1(或暴露300 s,88.4%),表明了MI-PDD/TOCN薄膜对2,4-DNT分子具有优良的响应灵敏度与特异的选择性。A novel conjugated polymer with an increased possibility of π-electron delocalization was bonded onto the（2,2,6,6-Tetramethylpiperidine-1-oxyl）-oxidized cellulose nanofibril（TOCN） film surface.Then,2,4-dinitrotoluene（2,4-DNT） was chosen as model nitroaromatic analyte,and MI-PDD/TOCN film was prepared via surface molecularimprinting technique.The MI-PDD/TOCN film is used as fluorescent sensor for the selective response of 2,4-DNT.The results show that the fluorescence quenching constant（or the fluorescence quenching efficiency） of the MI-PDD/TOCN film towards TNT solution（or vapor） is only 1.6×10^4 L/mol（or exposing 300 s,18.2%）.However,the fluorescence quenching constant（or the fluorescence quenching efficiency） of the MI-PDD/TOCN film towards 2,4-DNT solution（or vapor） is up to 2.78×10^4 L/mol（or exposing 300 s,88.4%）.This demonstrates that the MI-PDD/TOCN film exhibits highly selective recognition and fast response towards target 2,4-DNT.In addition,the selective response of 2,4-DNT for the MI-PDD/TOCN film shows good reversibility.

关 键 词：2 4-二硝基甲苯 荧光化学传感器 表面分子印迹 共轭聚合物 选择性响应 

分 类 号：TB383[一般工业技术—材料科学与工程]