Stimuli-Responsive Two-Dimensional Supramolecular Polymers Based on Trinuclear Platinum(II) Scaffolds: Reversible Modulation of Photoluminescence, Cavity Size, and Water Permeability,Journal of the American Chemical Society

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Stimuli-Responsive Two-Dimensional Supramolecular Polymers Based on Trinuclear Platinum(II) Scaffolds: Reversible Modulation of Photoluminescence, Cavity Size, and Water Permeability
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-09-10 , DOI: 10.1021/jacs.0c07969
Zhen Chen ₁ , Michael Ho-Yeung Chan ₁ , Vivian Wing-Wah Yam ₁

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Here we report the first two-dimensional (2D) supramolecular polymer, which has varying structure and function arising from the perturbation of noncovalent metal···metal interactions in response to acid-base stimuli. This 2D assembly possesses a positively charged, honeycomb-like nanostructure consisting of trinuclear alkynylplatinum(II) terpyridine complexes appended with acid-sensitive dimethylamino groups. Upon addition of acids and bases, reversible switching mediated by protonation and deprotonation of dimethylamino and dimethylammonium moieties intrinsically alters the positive charge density of the constituent cationic units, which causes interior cavities to adaptively adjust their size, accompanied by drastic photoluminescence changes. When water molecules pass through the membranes obtained from 2D supramolecular polymers, the permeating flux can also be tuned by the pH values of the buffer media. This work paves the way toward supramolecularly engineered 2D smart materials with stimuli-responsive properties.

中文翻译：

基于三核铂 (II) 支架的刺激响应二维超分子聚合物：光致发光、腔尺寸和透水性的可逆调制

在这里，我们报告了第一个二维 (2D) 超分子聚合物，它具有不同的结构和功能，这是由于非共价金属…金属相互作用对酸碱刺激的响应而产生的扰动。这种二维组件具有带正电荷的蜂窝状纳米结构，由三核炔基铂 (II) 三联吡啶复合物组成，并附加有对酸敏感的二甲氨基。在添加酸和碱后，由二甲氨基和二甲铵部分的质子化和去质子化介导的可逆转换本质上改变了组成阳离子单元的正电荷密度，这导致内腔自适应地调整它们的大小，伴随着剧烈的光致发光变化。当水分子穿过由二维超分子聚合物制成的膜时，渗透通量也可以通过缓冲介质的 pH 值进行调整。这项工作为具有刺激响应特性的超分子工程二维智能材料铺平了道路。

更新日期：2020-09-10

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