金属有机框架与形态演变的交互和生长途径
Goeun Choi1, Eunji Kim1, Sojin Oh1
1Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea.
ACS nano
|January 17, 2026
概括
控制异型金属有机框架 (MOF) 的增长是混合MOF的关键. 格子不匹配决定了MOF对MOF的增长方向,使复杂的结构具有可调节接口.
科学领域:
- 材料科学 材料科学 材料科学
- 晶体学 晶体学是指结晶学.
- 纳米技术纳米技术
背景情况:
- 通过MOF-on-MOF增长构建的混合金属有机框架 (MOF) 提供了先进的功能.
- 控制MOF与不匹配的网格之间的异构增长仍然是一个重大挑战.
研究的目的:
- 在异型MOF-on-MOF过程中展示和管理MOF的界面和生长行为.
- 阐明格子匹配在指导MOF对MOF生长中的作用.
主要方法:
- 在MIL-68B模板上使用In-MIL-53C和In-MIL-53D调查了MOF对MOF的增长.
- 分析了基于格子不匹配百分比的接口生长行为.
- 监控反应序列,包括播种,合并和生长.
主要成果:
- 不同类型的增长是由格子匹配控制的;In-MIL-53C在其{110}平面上增长了19.5%的不匹配.
- 在MIL-53D使用它的{010}平面 (1.0%不匹配) 由于{110}平面上的很大不匹配.
- 证明即使不稳定的MOF表面也可以根据结构兼容性用于MOF对MOF的生长.
- 合成了一个复杂的五段混合MOF,In-MIL-68B@In-MIL-53C@In-MIL-68B-Br@In-MIL-53C,具有H形空隙.
结论:
- 格子匹配度是控制异型MOF-on-MOF生长方向的关键因素.
- 如果实现了结构兼容性,可以选择不利的MOF表面进行界面生长.
- 顺序的MOF-on-MOF增长可以构建复杂的混合架构,具有定义的细分和空隙.
相关概念视频
02:32Bonding in Metals
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
02:37Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
02:58Properties of Transition Metals
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
02:51Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
01:23Properties of Organometallic Compounds
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...