光响应性有机-无机杂化分子印迹聚合物的制备及表征  

Preparation and Characterization of Photoresponsive Organic-inorganic Hybrid Molecularly Imprinted Polymers

作　　者：高超[1] 杨瑜珠[1] 张广播[1] 彭敬东[1] 唐倩[1] 龚成斌[1] 

机构地区：[1]西南大学化学化工学院,重庆400715

出　　处：《高等学校化学学报》2012年第12期2801-2808,共8页Chemical Journal of Chinese Universities

基　　金：教育部博士点新教师基金(批准号:20090182120010);重庆市自然科学基金(批准号:CSTC2009BB 4001);中央高校基本科研业务费专项资金(批准号:XDJK2009C178);西南大学博士基金(批准号:SWUB2008075)资助

摘　　要：以4-硝基苯酚、2,4-二氯苯氧乙酸和3-氯丙基三乙氧基硅烷为原料,经氧化偶合、酰化、酯化反应合成了共价结合模板分子2,4-二氯苯氧乙酸(2,4-D)的光响应性含有机硅的偶氮苯功能单体,通过溶胶-凝胶法制备了光响应性的有机-无机杂化分子印迹聚合物(OIHMIP).研究了该分子印迹聚合物光响应性能、对2,4-D的吸附性能和选择识别及光控释放与吸收能力,用原子力显微镜对其形貌进行了表征.结果表明,制得的OIHMIP具有规则的球形,粒径介于150～200 nm之间.OIHMIP对2,4-D具有良好的吸附和选择识别能力,在365和440 nm的紫外-可见光交替照射下,可控制2,4-D的释放与吸收.A photoresponsive functional azobenzene monomer containing silica was prepared by covalent imprinting for 2,4-dicholrophenoxyacetic acid（2,4-D） via oxidation-coupling reaction, acetylation and esterification reaction using commercially available p-nitrophenol, 2,4-dicholrophenoxyacetic acid and 3-chloropropyltriethoxysilane as the starting materials. Photoresponsive organic-inorganic hybrid molecular imprinted polymer （OIHMIP） for 2,4-D was prepared by sol-gel method. The photoresponsive properties, absorption abilities, selective recognition and photoregulated control the release and uptake of target molecule of OIHMIP were also studied. As characterized by atomic force microscope, the morphology of OIHMIP is sphere and the diameter of the spheres ranges in 150-200 nm. The experimental results show that OIHMIP has a high adsorption capacity and good selective recognition for 2,4-D, and reversible uptake and release of 2,4-D upon alternate irradiation at 365 and 440 nm, respectively.

关 键 词：2 4-二氯苯氧乙酸 光响应性有机硅偶氮苯 溶胶-凝胶法 有机-无机杂化分子印迹聚合物 

分 类 号：O635.2[理学—高分子化学]