A novel ion‐imprinted hydrogel for recognition of potassium ions with rapid response |
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| Authors: | Han‐Guang Wu Xiao‐Jie Ju Rui Xie Ying‐Mei Liu Jin‐Gen Deng Catherine Hui Niu Liang‐Yin Chu |
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| Institution: | 1. School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China;2. Key Laboratory of Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, Sichuan 610041, PR China;3. Department of Chemical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, Canada SK S7N 5A9 |
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| Abstract: | A novel ion‐imprinted strategy is developed for synthesizing responsive hydrogels with rapid response to potassium ions. With potassium ions as templates, ion‐imprinted poly(N‐isopropylacrylamide‐co‐benzo‐15‐crown‐5‐acrylamide) (P(NIPAM‐co‐B15C5Am)) hydrogels are synthesized with 15‐crown‐5 crown ethers mounted on the polymer networks in pairs; therefore, it is very easy and fast for the crown ethers to capture potassium ions again by their Venus flytrap action and form stable 2:1 “host–guest” complexes with potassium ions in the ion‐recognition process. As a result, the response rate of the ion‐imprinted hydrogels to potassium ions is significantly faster than that of normal P(NIPAM‐co‐B15C5Am) hydrogels in which 15‐crown‐5 crown ethers are randomly pendent on the polymeric networks. Copyright © 2010 John Wiley & Sons, Ltd. |
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| Keywords: | hydrogels stimuli‐sensitive polymers host– guest systems molecular imprinting molecular recognition |
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