【作者】 周政；

【导师】 孙向英； 刘斌；

【作者基本信息】 华侨大学 ， 高分子化学与物理， 2006， 硕士

【摘要】 有机锡化合物因其良好的杀生效果而被广泛用作船舶防污漆的添加剂，但同时对海洋生态系统也造成了严重的影响，并且被认为是迄今为止人为引入海洋环境中毒性最大的物质之一。海水中有机锡的富集分离与检测，已成为分析科学领域的热门研究课题。 分子印迹技术是一种制备分离介质的新方法，利用所合成的聚合物内的空穴对模板分子的“记忆效应”来实现聚合物对模板分子的选择性识别。因为印迹聚合物具有预定性、识别性和实用性等特点，所以得到越来越多的应用。 本文合成了有机锡分子印迹聚合物，用于富集分离有机锡；制备了桑色素修饰电极，用于二丁基锡的测定。主要内容如下： 1．以壳聚糖为功能基体，有机锡为模板分子，戊二醛为交联剂，利用分子印迹技术制备了在空间结构和结合位点上与模板分子相匹配的有机锡（一丁基锡和二丁基锡）分子印迹聚合物。研究了分子印迹聚合物的合成条件、对有机锡的吸附和选择识别能力，并对其结构进行表征。结果表明，所合成的分子印迹聚合物对有机锡具有良好的吸附和选择识别能力。 2．采用电化学聚合方式将桑色素修饰到玻碳电极表面，研究了该修饰电极方波阳极溶出伏安法测定二丁基锡的机理和实验条件。结果表明：在0.05mol·L^-1HAc-NaAc底液中，修饰电极对二丁基锡有良好的络合性。二丁基锡的溶出峰电流与其浓度在2～38ng·ml^-1范围内呈良好的线性关更多还原

【Abstract】 Organotin compounds are widely used as biocidal additives in antifouling paints due to their effectiveness. However, they also cause damage to non-target organisms and are regarded as the most toxic material ever deliberately introduced into the sea. The preconcentration, separation and determination of organotin compounds in sea water have become the popular research in analytical science field.Molecular imprinting is a new method to separate medium. The selective recognition of imprinted polymers to the template molecule is obtained through the "memory effect" of the cavities in the polymer which are formed during the polymerization process. With the characteristic of predetermination, recognition and practicability, molecular imprinted polymers （MIPs） are used in many fields.The thesis reported the synthesis of organotin MIPs and the applications in organotin preconcentration and separation. The determination of organotin with morin-modified glassy carbon electrode was also discussed. The thesis includes the main contents as follows:1. Using organotin as the template molecule, chitosan as the functional monomer and glutaraldehyde as the cross-linking monomer, organotin （monobutyltin and dibutyltin） molecularly imprinted polymers were synthesized by the molecular imprinting technology and the structure of MIPs was characterized with scanning electronic microscope. We studied the synthesis conditions of MIPs, the adsorption properties and selective recognition of MIPs for organotin. The experimental results showed that MIPshad high adsorption capacity and good selective recognition for organotin.2. Morin-modified electrode was prepared by electrochemical polymerization. We studied the determination condition for dibutyltin by anodic stripping voltammetry. The results showed the morin could complex with dibutyltin on the electrode surface in 0.05mol·L^-1’ HAc-NaAc solution. There was a good linear relationship between the peak current and the dibutyltin concentration in the range of 2～38ng·mL^-1’ and the determination limit of dibutyltin was 2ng·mL^-1.更多还原