1-甲基-3-octylimidazolium化物对MIL-53 (((Al) 结晶度和颗粒大小的影响
Oliver Wang1, Pranavsai Vadlamudi1, Victoria Jang1
1Department of Chemistry, Bowdoin College, Brunswick, ME 04011, USA. a.ortollbloch@bowdoin.edu.
Physical chemistry chemical physics : PCCP
|October 31, 2024
概括
像OmimCl这样的离子液体可以影响金属有机框架 (MOF) 合成. 低度的OmimCl可促进MIL-53的晶体生长,而高度则会阻碍晶体生长.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 结晶科学 结晶科学
背景情况:
- 离子液体是具有调节性质的新材料.
- 它们作为金属有机框架 (MOF) 合成中的添加剂的作用在很大程度上尚未被探索.
- MIL-53 (((Al) 是一个重要的MOF,具有多样化的应用.
研究的目的:
- 为了研究1-甲基-3-octylimidazolium化物 (OmimCl) 对MIL-53的热水合成的影响.
- 了解OmimCl度如何影响MOF结晶性,粒子大小和结构完整性.
主要方法:
- 在不同的OmimCl度 (0.05-10%v/v) 的存在下,MIL-53(Al) 的热水合成.
- 使用评估结晶性和结构的技术,对合成的MOF进行表征.
主要成果:
- 低OmimCl度 (0.05-0.50%v/v) 导致结晶度增加和颗粒大小增加,表明有偏好的[001]生长.
- 高度的OmimCl (1.0-10%v/v) 导致缺少连接器和减少结晶性,表明结晶生长停止.
- OmimCl作为一个度依赖的结晶添加剂.
结论:
- OmimCl可用于控制MIL-53 (((Al) 晶体的生长和形态.
- 为了达到所需的MOF特性,OmimCl的度至关重要.
- 这项研究提供了关于在MOF合成中使用离子液体作为添加剂的见解.
相关概念视频
01:21Polymer Classification: Crystallinity
2.8K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.8K
02:54Molecular and Ionic Solids
16.9K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.9K
02:54Trends in Lattice Energy: Ion Size and Charge
23.7K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.7K