In situ Cu(II)-containing chiral polymer complex sensor for enantioselective recognition of phenylglycinol

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• 作者：Lu Wang ; Fengyan Song ; Jiali Hou ; Junfeng Li ; Yixiang Cheng ; ^{yxcheng@nju.edu.cn} ; Chengjian Zhu
• 关键词：Enantioselective recognition ; Phenylglycinol ; Cu(II)-containing polymer complex
• 刊名：Polymer
• 出版年：2012
• 出版时间：7 December, 2012
• 年：2012
• 卷：53
• 期：26
• 页码：6033-6038
• 全文大小：820 K

文摘

A chiral polymer P1 was synthesized by the polymerization of 2,5-dibutoxy-1,4-di(benzaldehyde)-1,4-diethynylbenzene (M-1) with (R,R)-1,2-diaminocyclohexane (M-2) via Schiff's base formation, and the chiral polymer P2 could be obtained by the reduction reaction of P1 with NaBH₄. P2 can serve as a ¡°turn-off¡± fluorescent sensor toward Cu²⁺ and Ni²⁺. The in situ generated Cu(II)-containing polymer complex of P2 (Cu(II)-P2) can exhibit remarkable ¡°turn-on¡± fluorescence enhancement response and considerable enantioselectivity toward unmodified phenylglycinol via a ligand displacement mechanism. More importantly, (R,R)-Cu(II)-P2 solution can turn on bright blue fluorescence color change again upon addition of l-phenylglycinol under a commercially available UV lamp, which can be clearly observed by the naked eyes for direct visual discrimination at low concentration. The simple, rapid and sensitive benign process makes this protocol promising for recognition of phenylglycinol enantiomers.