Related Experiment Video
Updated: Mar 1, 2026
11:27
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
49.3K
The Solvent Induced Inter-Dimensional Phase Transformations of Cobalt Zeolitic-Imidazolate Frameworks
1College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|June 6, 2017
Summary
Researchers explored phase transitions in zeolitic-imidazolate frameworks (ZIFs), transforming 3D ZIF-67 into 2D ZIF-L. This work enables control over ZIF morphology and properties, including CO2 adsorption.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Zeolitic-imidazolate frameworks (ZIFs) are crucial porous materials with tunable properties.
- Controlling the morphology and phase transitions of ZIFs is key to optimizing their performance.
- Understanding inter-dimensional phase transformations is essential for advanced material design.
Purpose of the Study:
- To investigate the inter-dimensional topotactic phase transformations of 3D ZIF-67 to 2D ZIF-L.
- To explore the formation of novel core-shell ZIF-67@ZIF-L composites.
- To elucidate the role of solvent-induced growth and precursor concentration in phase control.
Main Methods:
- Solvent-induced growth method for controlled phase transformation.
- Detailed characterization of ZIF-67, ZIF-L, and ZIF-67@ZIF-L core-shell structures.
- Analysis of the influence of 2-methylimidazole (2-MIM) amine hydrogen behavior and concentration.
Main Results:
- Successful transformation of 3D ZIF-67 to 2D ZIF-L.
- Formation of unprecedented ZIF-67@ZIF-L core-shell composites with unique morphologies.
- Demonstration of tunable CO2 adsorption behaviors in Cobalt-based ZIFs (Co-ZIFs) linked to phase evolution.
Conclusions:
- The study provides a simple and efficient method for inter-dimensional phase control in ZIFs.
- Findings offer valuable insights for morphological design and property exploration of ZIFs.
- The tunable CO2 adsorption properties of Co-ZIFs suggest potential for CO2 detection and adsorption devices.
Related Concept Videos
02:34Structural Isomerism
22.0K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
22.0K
02:54Molecular and Ionic Solids
20.5K
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...
20.5K
02:58Crystal Field Theory - Octahedral Complexes
31.3K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
31.3K
02:42Valence Bond Theory
11.4K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.4K
02:18Network Covalent Solids
16.3K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
16.3K
03:02Colors and Magnetism
14.3K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.3K