在金属有机框架晶体中通过离散链接器交换超出孔径尺寸限制的分子封装
Joseph V Morabito1, Lien-Yang Chou, Zhehui Li
1Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States.
Journal of the American Chemical Society
|August 22, 2014
概括
大分子可以通过链接器交换期间创建的临时孔隙进入金属有机框架ZIF-8. 这个过程是最有效的,当框架框架.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 化学 化学 化学
背景情况:
- 像ZIF-8这样的金属有机框架 (MOF) 是具有可调节结构的多孔材料.
- 将大分子封装成MOF是具有挑战性的,因为孔径大小的限制.
研究的目的:
- 为了研究大型客分子被封装成预制的ZIF-8纳米晶体.
- 了解通过链接器交换促进客户入口的机制.
主要方法:
- 利用链接器交换条件来修改ZIF-8框架.
- 进行动力学研究来分析交换机制.
- 观察ZIF-8纳米晶体内的客体封装.
主要成果:
- 成功将大型客分子 (3-4倍光圈大小) 封装到ZIF-8.
- 识别了链接器解离过程中的短暂的"开放"孔隙状态,作为封装的关键.
- 确定ZIF-8中的链接器交换涉及竞争的分离和关联路径.
结论:
- 客体封装是通过ZIF-8中的离散链接器交换途径来促进的.
- 控制链接器交换条件可以增强大型分子进入MOF的加载.
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