机械化学合成与素结合的共价有机框架
Ehsan Hamzehpoor1, Farshid Effaty1,2,3, Tristan H Borchers3
1Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, H3A 0B8, Canada.
Angewandte Chemie (International ed. in English)
|July 6, 2024
概括
机械化学可以在室温下快速合成多孔的素共价有机框架 (COF). 这种无溶剂的方法显著减少了反应时间和溶剂的使用,以生产高表面积的材料.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术 纳米技术
背景情况:
- 玻色素共价有机框架 (COFs) 对水解敏感,使其合成复杂化.
- 传统的溶解热方法用于COF合成往往是耗时的和溶剂密集的.
研究的目的:
- 开发一种快速的,室温机械化学合成,用于氧基COFs.
- 为了克服boroxine COFs的水解敏感性,使用trimethylboroxine作为添加剂.
- 为了实现可扩展的生产高度,晶体COFs.
主要方法:
- 在室温下机械化学合成,使用三甲基素作为脱水剂.
- 实时拉曼光谱用于机械合成过程的定量运动分析.
- 响应声学混合 (RAM) 用于将合成扩展到多克数量.
主要成果:
- 成功合成了包括COF-102在内的2D和3D博洛克辛COF,这是第一个机械化学制备的3DCOF.
- 达到高孔隙性和结晶性,COF-102的表面积约为2,500 m2/g.
- 与溶解热方法相比,使用溶剂减少了>20倍,反应时间减少了100倍.
- 通过简单的真空干燥获得了定量产量,并使用RAM成功扩大了多克的规模.
结论:
- 机械化学提供了一种高效,可持续和可扩展的途径来合成氧化碳化合物.
- 三甲基博洛辛有效地减轻了水解敏感性,使强大的COF形成成为可能.
- 这种方法显著提升了先进的COF材料的实际可访问性和应用.
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