摘要
以槲皮素-钴(Ⅱ)的配合物为模板分子,在强极性甲醇溶剂中分别采用低温光引发和高温热引发聚合制备槲皮素-钴(Ⅱ)配位印迹聚合物.紫外-可见光谱分析确定了槲皮素与钴(Ⅱ)形成配合物的最佳配位比.根据印迹聚合物的平衡结合量优化功能单体丙烯酰胺用量.利用红外光谱、透射电镜和平衡结合实验,考察不同引发方式对聚合物的结构、微观形貌及结合性能的影响.进一步通过特异吸附容量和印迹指数确定,低温光引发聚合更适于配位分子印迹聚合物的制备.同时研究了不同阳、阴离子对印迹聚合物选择识别性的影响.结果表明光引发的金属配位分子印迹聚合物具有良好的吸附选择性,印迹指数可达3.919.
A series of metal-complexing imprinted polymers were prepared in methanol with quercetin-Co（Ⅱ） complex as template by photo and thermal initiated polymerization （quercetin is a kind of flavonoids which are important active ingredients of Chinese herbs）, respectively. The rational ratio between quercetin and Co（Ⅱ） was investigated by UV-Vis spectroscopy. Assessment of the various polymers re- vealed that the optimal ratio of functional monomer to template was 4 ： 1. The molecularly imprinted poly- mers （MIPs） prepared were characterized by Fourier transform infrared spectra. The effect of initiation mode on the morphology and binding capacity of MIPs were studied by transmission electron microscopy and equilibrium binding experiments. The specific absorption capacity index and the imprint factor were ob- tained, and it was testified that the lower temperature was more suitable for the polymerization of metal-complexing imprinted polymers. The effect of different cations and anions on binding capacities of the photo-initiated imprinted polymers were studied in detail. The results showed that the photo-initiated metal-complexing imprinted polymers exhibited the good selective adsorption ability to quercetin-Co（II） and the imprint factor was up to 3.919.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2012年第7期921-928,共8页
Acta Chimica Sinica
基金
天津市自然科学基金重点项目(No.10JCZDJC21900)资助项目~~
关键词
分子印迹技术
印迹聚合物
金属配位键
槲皮素
钴(Ⅱ)
Keywords molecular imprinting technique
molecularly imprinted polymer
metal coordination
quercetin
Co（Ⅱ）
