一个新的基于双尿素的体受体:合成,固态结构和结合研究
Daniele Paderni1, Mauro Formica1, Eleonora Macedi1
1Department of Pure and Applied Sciences, University of Urbino Carlo Bo, via Ca' le Suore 2-4, 61029, Urbino, Italy.
Chemistry, an Asian journal
|December 2, 2024
概括
一种新的双尿素受体,L,通过键有效地结合了各种离子. 与化物相比,这种新配体对酸盐和诺夫洛克萨等碳酸盐离子具有更强的亲和力.
科学领域:
- 超分子化学 超分子化学
- 有机化学 有机化学
- 协调化学 协调化学
背景情况:
- 阳离子识别在生物和化学过程中至关重要.
- 设计具有高亲和力和对阴离子的选择性的人造受体仍然是一个挑战.
研究的目的:
- 合成和表征一种基于bis-urea的新型宏双循环受体 (L).
- 调查L的离子结合特性,重点关注与球形和碳酸盐离子的相互作用.
- 阐明受体 - 阴离子复合体的结合模式和固态度.
主要方法:
- 基于四环多德干支架的双尿素受体 (L) 的合成.
- 核磁共振 (NMR) 谱学用于研究受体-离子相互作用.
- 用X射线晶体学来确定受体-阴离子 adducts 的固态结构.
主要成果:
- 新型体受体L成功合成和表征.
- L通过在尿素部分的气结合,与包括化物,酸盐和诺夫洛克萨在内的各种离子结合.
- 对化物和酸盐观察到具有1:1和1:2史泰基测量的复合物,而对于诺夫洛克萨只有1:1的复合物.
- 与化物 ([LCl]−) 相比,对碳酸盐离子 ([LAcO]−和[LNor]−) 确定了更高的形成常数.
- 晶体结构证实了受体的NH组与结合的离子之间的键相互作用.
结论:
- 双尿素受体L表现出有效的阴离子结合能力.
- 该受体对化物而不是碳酸盐离子具有选择性.
- 这项研究提供了对离子识别宏循环受体设计的见解.
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