对H键竞争对手对八角-[4]管的依赖溶剂的结构的影响
Marco Milone1, Ilenia Pisagatti1, Giuseppe Gattuso1
1Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università degli Studi di Messina Viale F. Stagno d'Alcontres 31 Messina 98166 Italy anotti@unime.it mparisi@unime.it.
RSC advances
|February 5, 2024
概括
合成了一种新型的八角管[4]管 (UC4T),它表现出形状灵活性. 阴离子结合会诱导对称性变化,形成短暂的囊组合和固态中独特的超分子结构.
科学领域:
- 超分子化学 超分子化学
- 有机合成 有机合成
- 晶体工程公司 晶体工程
背景情况:
- 卡利克斯[4]是具有可调节性质的多功能宏循环平台.
- 尿素功能化的[4]因其离子和阴离子结合能力而闻名.
- 控制宏观循环的结构动态和自我组装对于设计功能性材料至关重要.
研究的目的:
- 为了合成和表征一种新型的八角[4]管 (UC4T) 衍生物.
- 在不同的溶剂极性下研究溶液中UC4T的构造性行为.
- 探索离子复合对UC4T的结构和组装的影响.
- 阐明UC4T的固态结构和超分子组织.
主要方法:
- 八酸[4]管 (UC4T) 的多步骤有机合成.
- 核磁共振 (NMR) 光谱法用于研究溶液状态的形态动态.
- 用X射线衍射晶体学来确定固态结构.
- 紫外线-Vis光谱和定位实验用于阴离子结合研究.
主要成果:
- 从一个p-tert-butylcalix[4]管前体成功合成了UC4T.
- 在极性溶剂中,UC4T存在于C2v对称构造,而极性较少的溶剂则诱导非对称结构.
- 或离子复合引发了对C4v对称性的构造变化,导致过渡的二维囊物种.
- X射线研究揭示了两种不同的晶体形式 (α和β) 带有缩形[4]arene子单元和多种不同的尿素群方向.
- β晶体形式呈现出具有大型溶剂通道的1D伪囊型聚合物阵列.
结论:
- UC4T在溶液中表现出显著的形状灵活性,受溶剂极性影响.
- 阴离子结合是对称性重新排列和过渡性超分子组合形成的关键触发因素.
- UC4T的固态结构揭示了多样化的包装图案和创建多孔材料的潜力.
- 这项研究为分子识别和材料科学提供了功能化的calix[4]竞技场的结构-属性关系的见解.
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