Improvement of imprinting effect of ionic liquid molecularly imprinted polymers by use of a molecular crowding agent
Jia, M (Jia, Man); Yang, J (Yang, Jian); Sun, YK (Sun, Ya Kun); Bai, X (Bai, Xi); Wu, T (Wu, Tao); Liu, ZS (Liu, Zhao Sheng); Aisa, HA (Aisa, Haji Akber); Liu, ZS; Aisa, HA
2018
发表期刊ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷号410期号:2页码:595-604
摘要

We aimed to improve the imprinting effect of ionic liquid molecularly imprinted polymers (MIPs) by use of a molecular crowding agent. The ionic liquid 1-vinyl-3-ethylimidazolium tetrafluoroborate ([VEIm][BF4]) was used as the functional monomer and aesculetin was used as the template molecule in a crowding environment, which was made up of a tetrahydrofuran solution of polystyrene. The ionic liquid MIPs that were prepared in the crowding environment displayed an enhanced imprinting effect. NMR peak shifts of active hydrogen of aesculetin suggested that interaction between the functional monomer and the template could be increased by the use of a crowding agent in the self-assembly process. The retention and selectivity of aesculetin were affected greatly by high molecular crowding, the amount of high molecular weight crowding agent, and the ratio of [VEIm][BF4] to aesculetin. The optimal MIPs were used as solid-phase extraction sorbents to extract aesculetin from Cichorium glandulosum. A calibration curve was obtained with aesculetin concentrations from 0.0005 to 0.05 mg mL(-1) (correlation coefficient R (2) of 0.9999, y = 1519x + 0.0923). The limit of quantification was 0.12 mu g mL(-1), and the limit of detection was 0.05 mu g mL(-1). The absolute recovery of aesculetin was (80 +/- 2)% (n = 3), and the purity of aesculetin was (92 +/- 0.5)% (n = 5). As a conclusion, molecular crowding is an effective approach to obtain ionic liquid MIPs with high selectivity even in a polar solvent environment.

关键词Molecular Crowding Agent Ionic Liquid Monomer Aesculetin Solid-phase Extraction Molecularly Imprinted Polymer
DOI10.1007/s00216-017-0760-5
收录类别SCI
WOS记录号WOS:000419127900028
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/5116
专题省部共建新疆特有药用资源利用重点实验室
通讯作者Liu, ZS; Aisa, HA
作者单位1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Xinjiang, Peoples R China
2.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, State Key Lab Basis Xinjiang Indigenous Med Plant, Urumqi 830011, Xinjiang, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
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Jia, M ,Yang, J ,Sun, YK ,et al. Improvement of imprinting effect of ionic liquid molecularly imprinted polymers by use of a molecular crowding agent[J]. ANALYTICAL AND BIOANALYTICAL CHEMISTRY,2018,410(2):595-604.
APA Jia, M .,Yang, J .,Sun, YK .,Bai, X .,Wu, T .,...&Aisa, HA.(2018).Improvement of imprinting effect of ionic liquid molecularly imprinted polymers by use of a molecular crowding agent.ANALYTICAL AND BIOANALYTICAL CHEMISTRY,410(2),595-604.
MLA Jia, M ,et al."Improvement of imprinting effect of ionic liquid molecularly imprinted polymers by use of a molecular crowding agent".ANALYTICAL AND BIOANALYTICAL CHEMISTRY 410.2(2018):595-604.
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