Static and Dynamic Gradient Based Directional Transportation of Neutral Molecules in Swollen Polymer Films.
Static and Dynamic Gradient Based Directional Transportation of Neutral Molecules in Swollen Polymer Films.
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中性分子在Swedish聚合物膜中基于静态和动态梯度的定向输运。
DOI：
10.1002/anie.202206061
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发表时间：
2022-10-10
影响因子：
16.6
通讯作者：
Braun, Paul, V
中科院分区：
文献类型：
--
作者：
Ali, Mohammad A.;Volmert, Brett;Evans, Christopher M.;Braun, Paul, V
关键词：
Materials which selectively transport molecules offer powerful opportunities for concentrating and separating chemical agents. Here, utilizing static and dynamic chemical gradients, transport of molecules within swollen crosslinked polymers is demonstrated. Using an ≈200 μm static hydroxyl to hexyl gradient, the neutral ambipolar nerve agent surrogate diethyl (cyanomethyl)phosphonate (DECP) is directionally transported and concentrated 60‐fold within 4 hours. To accelerate transport kinetics, a dynamic gradient (a “travelling wave”) is utilized. Here, the non‐polar dye pyrene was transported. The dynamic gradient is generated by an ion exchange process triggered by the localized introduction of an aqueous NaCl solution, which converts the gel from hydrophobic to hydrophilic. As the hydrophilic region expands, associated water enters the gel, and pyrene is pushed ahead of the expansion front. The dynamic gradient provides about 10‐fold faster transport kinetics than the static gradient. Neutral molecules are transported along a pre‐defined pathway via static and dynamic chemical gradient respectively. A static hexyl to hydroxyl functionalized gradient could pull the neutral ambipolar nerve agent surrogate diethyl (cyanomethyl)phosphonate towards hydroxyl‐rich region. A dynamic gradient (a “travelling wave”) formed by a coupled reaction‐diffusion process was utilized to drive the neutral non‐polar molecule pyrene.
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影响因子：
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通讯作者：
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影响因子：
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Chen, Hao;Zhang, Shiyan;Braun, Paul, V
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