在酸-有机多面体中永久的多孔性
Belén Lerma-Berlanga1, Javier Castells-Gil1, Carolina R Ganivet1
1Functional Inorganic Materials Team, Instituto de Ciencia Molecular (ICMol), Universitat de València, 46980 Paterna, València, Spain.
Journal of the American Chemical Society
|December 8, 2021
概括
研究人员使用 siderophore 类型的链接器创建了第一个多孔的-有机多面体. 这些新型分子的表面积很大,
科学领域:
- 材料科学
- 化学学
- 纳米技术
背景情况:
- 酸盐的功能组是受到 siderophores 的启发,而 siderophores 是结合金属离子的生物分子.
- 有机框架 (TOF) 是一种金属有机材料,在气体储存和催化中具有潜在的应用.
研究的目的:
- 使用 siderophore 类型的连接器合成第一个-有机多面体.
- 为了研究孔腔化学对这些多面体的表面积的影响.
主要方法:
- 使用基于酸盐的链接剂合成有机框架.
- 通过混合链接器策略组装分子 (cMUV-11).
主要成果:
- 有机多面体的成功合成
- 在混合连接器变种中达到接近1200 m2·g-1的高表面积.
- 证明了量身定制的孔腔化学对表面积的影响.
结论:
- 可以有效地使用 siderophore 类型的链接器来构建多孔的-有机多面体.
- 这些材料的孔隙化学可以调整以达到较高的表面积.
- 这些发现为设计先进的多孔材料开辟了新的途径.
相关概念视频
01:18Aromatic Hydrocarbon Cations: Structural Overview
3.2K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
3.2K
01:18Porosity in Cement Paste
253
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
253