通过编程的溶剂排除在折叠囊中的极性耐受结
Yun Liu1, Fred C Parks1, Edward G Sheetz1
1Department of Chemistry, Indiana University 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States.
Journal of the American Chemical Society
|February 17, 2021
概括
研究人员开发了一种新型的foldameric囊,可以有效地在极性溶剂中结合离子,克服了合成受体设计的重大挑战. 这一突破为水性环境中的水友性离子管理提供了新的策略.
科学领域:
- 超分子化学
- 合成有机化学
背景情况:
- 持续的离子结合对于合成受体设计至关重要,但在极性溶剂中具有挑战性.
- 大自然利用蛋白质中的溶剂排斥在水环境中有效的离子运输.
研究的目的:
- 在高极性溶剂中设计和合成能够稳定结合阴离子的foldameric囊.
- 研究设计囊的无溶剂结合亲和力和稳定性.
主要方法:
- 使用序列定义的折叠器化学来创建预先组织的离子复合的螺旋.
- 使用固态和溶液相研究来确认囊稳定性和溶剂排除性质.
- 通过与对照化合物进行比较,评估了不同溶剂介电常数的离子结合亲和度.
主要成果:
- 在溶剂介电常数增加4倍的情况下,foldameric囊保持了高的溶剂独立离子亲和力 (10^5 M^-1).
- 具有暴露于溶剂的结合点的对照化合物在极性溶剂中显著降低了阴离子亲缘关系.
- 发现二甲基硫化物使折叠剂变质,降低其离子结合亲和力.
结论:
- 设计的foldameric囊代表了在极性溶剂中有效运行的强离子受体的新原型.
- 这种方法在水圈和生物圈的水友性离子管理中提供了潜在的应用.
- 溶剂排斥是在极地环境中实现高离子亲和度的可行策略.
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