Preparation of a multi-hollow magnetic molecularly imprinted polymer for the selective enrichment of indolebutyric acid.
Preparation of a multi-hollow magnetic molecularly imprinted polymer for the selective enrichment of indolebutyric acid.
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DOI：
10.1002/jssc.201500256
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发表时间：
2015-08
影响因子：
3.1
通讯作者：
Shan-Feng Li;Chao Yin;S. Ren;Tao Yang;Jide Wang;Shun Feng
中科院分区：
文献类型：
--
作者：
Shan-Feng Li;Chao Yin;S. Ren;Tao Yang;Jide Wang;Shun Feng
开发了一种简单的方法，将3-吲哚丁酸和氧化铁纳米颗粒同时加入到聚(苯乙烯-甲基丙烯酸)共聚物基质中，制备了多中空磁性分子印迹聚合物。用扫描电子显微镜、傅里叶变换红外光谱和压汞测孔仪对所制备的吸附剂进行了表征。吲哚丁酸的吸附等温线表明，吸附剂中存在两种类型的亲和结合部位。高亲和力结合部位的表观最大结合容量和解离常数分别为17.88 mg/g和158.7μg/mL，低亲和力结合部位的表观最大结合容量和解离常数分别为9.310 mg/g和35.04μg/mL。结果表明，多中空磁性分子印迹聚合物对目标分子具有良好的识别能力和快速的动力学结合行为，比表面积高达511.3 m(2)/g，在空白样品和梨样品中添加3个浓度水平的吲哚丁酸的回收率为75.5-86.8%。
A simple strategy was developed for the preparation of multi-hollow magnetic molecularly imprinted polymers by incorporating 3-indolebutyric acid and ferroferric oxide nanoparticles simultaneously into a poly(styrene-co-methacrylic acid) copolymer matrix. The as prepared absorbents were characterized using scanning electron microscopy, Fourier-transform infrared spectroscopy and mercury porosimetry. The adsorption isotherms of indolebutyric acid revealed that there are two types of affinity binding sites in the absorbents. The apparent maximum binding capacity and dissociation constant were 17.88 mg/g and 158.7 μg/mL for high-affinity binding sites and 9.310 mg/g and 35.04 μg/mL for low-affinity binding sites, respectively. The results testified that multi-hollow magnetic molecularly imprinted polymers possessed excellent recognition capacity and fast kinetic binding behavior to the objective molecules due to the high specific surface area as large as 511.3 m(2) /g. Recoveries of 75.5-86.8% were obtained for the indolebutyric acid spiked at three concentration levels in blank and pear samples.