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为制备戊唑醇分子印迹聚合物,选择合适的功能单体及其添加量。采用紫外光谱法研究α-甲基丙烯酸(MAA)、丙烯酰胺(AM)与戊唑醇的作用形式,作用强度,最佳浓度比和形成的结合位点数。结果表明,戊唑醇与两种功能单体都形成氢键;戊唑醇的三唑环共轭双键的π电子吸收能量跃迁到π*共轭反键轨道,氢键的形成使π→π*的吸收带发生迁移,最大吸收波长随着体系功能单体浓度的增加发生红移。戊唑醇与两种功能单体最佳浓度配比:戊唑醇∶MAA=1∶4和戊唑醇∶AM=1∶4。戊唑醇与两种功能单体都有结合能力,且结合力较强。1个戊唑醇分子分别与3个MAA和2个AM形成稳定的配合物。采用AM为功能单体合成的分子印迹聚合物,对戊唑醇具有较好的稳定性和特异识别能力。
In order to prepare tebuconazole molecularly imprinted polymer, the suitable functional monomer and its addition amount were selected. The effects of α-methacrylic acid (MAA), acrylamide (AM) and tebuconazole on the action form, intensity of action, the optimal concentration ratio and the number of formed binding sites were studied by UV spectroscopy. The results showed that tebuconazole formed hydrogen bond with both functional monomers. The π electron absorption energy of the triazolyl conjugate double bond of tebuconazole transited to π * conjugated antibonding orbital. The formation of hydrogen bond made π → π * absorption band migration occurs, the maximum absorption wavelength with the system monomer concentration increases redshift. The optimal concentrations of tebuconazole and two functional monomers were compared: tebuconazole: MAA = 1: 4 and tebuconazole: AM = 1: 4. Tebuconazole with both functional monomers have binding ability, and strong binding. One tebuconazole molecule formed stable complexes with 3 MAA and 2 AM, respectively. Molecularly imprinted polymer synthesized by AM as functional monomer has good stability and specificity for tebuconazole.