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首页> 外文期刊>Chemistry: A European journal >Load-collapse-release cascades of amphiphilic guest molecules in charged dendronized polymers through spatial separation of noncovalent forces
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Load-collapse-release cascades of amphiphilic guest molecules in charged dendronized polymers through spatial separation of noncovalent forces

机译：通过非共价力的空间分离，两性客体分子在带电树突化聚合物中的负载崩溃-释放级联

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摘要

The ability to pack guest molecules into charged dendronized polymers (denpols) and the possibility to release these guest molecules from subsequently densely aggregated denpols in a load-collapse-release cascade is described. Charged denpols, which constitute molecular objects with a persistent, well-defined envelope and interior, are capable of incorporating large amounts of amphiphilic guest molecules. Simultaneously, multivalent ions can coordinate to the surfaces of charged denpols, leading to counterion-induced aggregation of the already guest-loaded host structures. Thus, although the local guest concentration in denpol-based molecular transport might already be initially high due to the dense guest packing inside the dendritic denpol scaffolding, the "local" guest concentration can nonetheless be further increased by packing (through aggregation) of the host-guest complexes themselves. Subsequent release of guest compounds from densely aggregated dendronized polymers is then possible (e.g., through increasing the solution concentration of imidazolium-based ions). Augmented with this release possibility, the concept of twofold packing of guests, firstly through hosting itself and secondly through aggregation of the hosts, gives rise to a load-collapse-release cascade that strikingly displays the high potential of dendronized macromolecules for future molecular transport applications. Be our guest: Charged dendronized polymers can incorporate large amounts of amphiphilic guest molecules. Simultaneously, multivalent ions can coordinate to their charged surface to lead to counterion-induced aggregation of the host structures and dense packing of guest molecules (see picture). The possibility of subsequent release of guest compounds from condensed host structures gives rise to a load-collapse-release scenario.
机译：描述了将客体分子填充到带电的树枝状聚合物（树胶）中的能力，以及从负载坍塌释放级联中随后密集聚集的树胶中释放这些客体分子的可能性。带电的树胶构成具有持久，明确定义的包膜和内部的分子对象，能够结合大量两亲性客体分子。同时，多价离子可与带电树突的表面配位，导致反离子诱导的已客体加载的主体结构聚集。因此，尽管由于树突状树突状支架内部的密集的客体堆积，基于denpol的分子转运中的局部客体浓度最初可能已经很高，但是“局部”客体浓度仍可以通过宿主的堆积（通过聚集）而进一步提高-来宾自己复杂。随后可以从高密度聚集的树枝状聚合物中释放客体化合物（例如，通过提高咪唑基离子的溶液浓度）。通过这种释放可能性的增强，客体双重包装的概念首先通过宿主自身，其次通过宿主的聚集产生了负载崩溃释放级联反应，该反应惊人地显示了树枝状大分子在未来分子运输应用中的巨大潜力。成为我们的客人：带电的树枝状聚合物可以掺入大量两亲性客人分子。同时，多价离子可与其带电表面配位，导致抗衡离子诱导的主体结构聚集和客体分子密集堆积（见图）。客体化合物随后从浓缩的主体结构中释放出来的可能性引起了负载崩溃释放的情况。

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