化学学报 ›› 2011, Vol. 69 ›› Issue (06): 739-744. 上一篇    下一篇

研究论文

柚皮苷印迹β-环糊精聚合物的制备及性能研究

马秀玲1,陈巧平2,兰瑞芳1,郑曦1,陈晓1,陈震*,1,2   

  1. (1 福建师范大学化学与材料学院 福州 350007)
    (2宁德师范高等专科学校化学系 宁德 352100)
  • 投稿日期:2010-06-02 修回日期:2010-11-01 发布日期:2010-11-26
  • 通讯作者: 陈震 E-mail:zc1224@pub1.fz.fj.cn

Preparation and Property Studies of Naringin Imprinting β-Cyclodextrin Polymer

Ma Xiuling1 Chen Qiaoping 2 Lan Ruifang1 Zheng Xi1 Chen Xiao1 Chen Zhen*,1,2   

  1. (1 College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007)
    (2 Chemistry Department of Fujian Ningde Teachers College, Ningde 352100)
  • Received:2010-06-02 Revised:2010-11-01 Published:2010-11-26

以柚皮苷(NG)为印迹分子, β-环糊精为功能体, 六亚甲基二异氰酸酯为交联剂, 采用乳液聚合法制备了对NG具有特定识别能力的吸附材料: 棒状印迹聚合物. 扫描电镜及比表面分析仪测试结果表明印迹聚合物具有较大的孔隙及比表面积|红外及核磁共振谱研究证实了识别位点来自β-环糊精与NG羟基间的氢键作用. 采用平衡吸附实验方法研究了聚合物的吸附性能和选择性能. 实验结果表明, 棒状印迹聚合物(RMIP)对NG具有较高的亲和性和选择性. Scatchard分析表明, MIP在识别NG过程中存在2类结合位点: KD1=0.016 mmol/L, Bmax1=15.31 μmol/g, KD2=0.24 mmol/L, Bmax2=98.41 μmol/g. 当NG浓度为 0.02 mg/mL时, MIP及相应NIP对 NG的分配系数 KD 分别为4.38和2.86, 印迹因子α为1.53.

关键词: 分子印迹聚合物, 柚皮苷, 识别性能, β-环糊精

Rod-like molecularly imprinted polymer (RMIP) was prepared by emulsion polymerization using β-cyclodextrin (β-CD) as a functional polymer, naringin (NG) as a template molecule and hexamethylene diisocyanate (HMDI) as crosslinker. The morphology, pore size distribution and specific surface area of the RMIP were observed by means of scanning electron microscopy (SEM) and BET adsorption apparatus. The interaction between the template molecule and functional polymer was analyzed by the infrared spectrum (IR) and 1H-nuclear magnetic resonance (1H NMR). Its adsorption property and selectivity were evaluated by equilibrium adsorption experiment method. The obtained results revealed appropriate affinity and selectivity of RMIP to NG. Scatchard analysis suggests that during RMIP recognition of NG, there were two classes of binding sites. The calculated dissociation constant KD1 and apparent maximum number Bmax1 of binding sites with high affinity were 0.016 mmol/L and 15.31 μmol/g respectively, while KD2 and Bmax2 of binding sites with low affinity were 0.24 mmol/L and 98.41 μmol/g. In 0.02 mg/mL NG solution, the distribution coefficients KD of NG on RMIP and corresponding NIP are 4.38 and 2.86, respectively. The imprinting factor α is 1.53.

Key words: molecularly imprinted polymer, naringin, molecular recognition, β-cyclodextrin