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首页> 外文期刊>Chemistry: A European journal >Acid/Base-Mediated Uptake and Release of Halide Anions with a Preorganized Aryl-Triazole Foldamer
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Acid/Base-Mediated Uptake and Release of Halide Anions with a Preorganized Aryl-Triazole Foldamer

机译：酸/碱介导的卤素和阴离子与预组织的芳基三唑折叠剂的释放

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摘要

A new approach for the construction of artificial receptors capable of selectively uptake and release of halides to mimic the biological halide ions pumps is developed, in which the preorganized aryl-triazole foldamer was designed to bear a resorcinolic group in the central strand as a switch regulator. By using 1,8-diazabicyclo[5.4.0]undec-7-ene/picric acid as the trigger, the foldamer can be switched between w-shape and helical conformation. Due to the large, half-open cavity as well as the additional electrostatic repulsion between oxyanions and guest halide, the foldamer in w-shape possesses a much weaker affinity for chloride, bromide, and iodide anions than those in the helical conformation in 6:94 (v/v) [D-6]DMSO/CDCl3. When the foldamer and chloride ions have the same initial concentrations of 1mM, 70 % chloride ions in the solution could be reversibly bound or released upon switching.
机译：开发了一种构建能够选择性吸收和释放卤化物以模仿生物卤化物离子泵的人工受体的新方法，其中将预组织的芳基三唑折叠剂设计为在中央链中带有间苯二酚基团作为开关调节剂。通过使用1,8-二氮杂双环[5.4.0]十一碳-7-烯/苦味酸作为触发剂，可以将折叠剂在w形和螺旋构象之间切换。由于宽大的半开放腔以及含氧阴离子和客体卤化物之间的额外静电排斥作用，W形的折叠剂对氯离子，溴离子和碘离子的亲和力比螺旋构象中的阴离子弱得多（6）： 94（v / v）[D-6] DMSO / CDCl3。当折叠剂和氯离子具有相同的1mM初始浓度时，溶液中70％的氯离子在转换时可能可逆地结合或释放。

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