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通过协同调节形状和电荷,具有多个可互换的透性状态的TASK2-Inspired聚合物纳米通道

Shengyang Zhou¹, Fengyu Ai¹, Zihe Song¹

¹State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian, 116024, P.R. China.

Angewandte Chemie (International ed. in English)

|September 2, 2025

概括

研究人员开发出模仿生物离子通道的智能人造纳米通道. 这些响应pH的道提供可调节的离子选择性和流量,使得有效的盐度梯度能量转换成为可能.

科学领域:

材料科学
生物仿真工程
纳米技术

背景情况:

生物离子通道精确地控制离子传输,对于细胞信号和能量转化至关重要.
人工纳米通道难以复制生物通道的复杂功能,仅限于单一的结构或电荷特性.
与pH关闭的TWIK相关的酸敏感K+通道2 (TASK2) 的功能依赖于协调的几何和表面电位控制.

研究的目的:

使用外部门复合策略设计和制造仿生响应纳米通道.
创建模仿生物通道pH受控行为和离子选择性的纳米通道,
探索这些响应性纳米通道在盐度梯度能量转换中的应用.

主要方法:

染料装载分支聚烯的开发,以构建复合纳米通道.
创建两个具有不同孔径和表面电荷的纳米通道模型 (负电荷大的孔径和正电荷的小孔径).
使用pH刺激来诱导质子化/脱质子化和形状变化,控制通道封闭和离子透性.

主要成果:

纳米通道在透性状态之间快速切换以应对外部pH变化.
通过应用对称和不对称的pH刺激,实现了四种不同的离子透状态 (无活化,抑制,休息,活化).
在高流量状态下显示的高离子选择性 (S_Na+/Cl-∼3332) 和在低流量状态下显示的低选择性 (S_Na+/Cl-∼0.33).
成功应用纳米通道用于盐度梯度能量转换,效率高达~50%.

结论:

外在门复合策略可以创建仿生响应的纳米通道.
这些纳米通道有效地模仿生物离子通道的pH受控功能和可调节的离子传输.
开发的纳米通道显示出在能源转换,特别是盐度梯度发电方面的巨大潜力.

关键词:

离子运输聚合物纳米通道盐度与梯度的能量转换 TASK2 道在pH-gating

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