Video Experimental Relacionado
Updated: May 15, 2026
08:42
Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
Published on: July 10, 2017
Control de la cristalinidad y la porosidad de los marcos orgánicos covalentes mediante la gestión de las
Xiong Chen1, Matthew Addicoat, Stephan Irle
1Department of Materials Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan.
Journal of the American Chemical Society
|December 29, 2012
Resumen
El control de las interacciones entre capas en los marcos orgánicos covalentes (COF) a través de fuerzas π-electrónicas mejora la cristalinidad y la porosidad. Este enfoque ofrece una nueva estrategia para el diseño de COF avanzados con propiedades a medida.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química supramolecular de las moléculas.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- Los materiales porosos cristalinos, como las estructuras orgánicas covalentes (COF), son vitales para numerosas aplicaciones.
- La optimización de la cristalinidad y porosidad de los COF es esencial para su rendimiento.
Objetivo del estudio:
- Para investigar el control sintético sobre la cristalinidad y porosidad de COF.
- Explorar el papel de las interacciones entre capas, específicamente las fuerzas π-electrónicas autocomplementarias, en la sintonización de las propiedades de las COF.
Principales métodos:
- Integración de unidades aromáticas sustituidas por fluoro y no sustituidas en unidades de borde de COF en diferentes proporciones molares.
- Utilizando interacciones π-electrónicas autocomplementarias para dirigir el autoensamblaje de COF.
- Caracterización de los COF resultantes para evaluar la cristalinidad y la porosidad.
Principales resultados:
- Interacciones gestionadas entre capas mediante la variación de las relaciones molares de las unidades aromáticas sustituidas y no sustituidas.
- Se demostró que las interacciones π-electrónicas mejoran la cristalinidad y la porosidad de los COF.
- Se observó la mejora más significativa en la cristalinidad y porosidad en COF con relaciones equimolares de unidades.
Conclusiones:
- Las interacciones entre capas se pueden administrar de manera efectiva para controlar la cristalinidad y la porosidad de los COF.
- Las fuerzas π-electrónicas autocomplementarias proporcionan una estrategia viable para el diseño de COF de alto rendimiento.
- Este trabajo presenta un nuevo enfoque para el diseño racional de marcos orgánicos covalentes.
Videos de Conceptos Relacionados
03:13Intermolecular Forces
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
03:13Intermolecular Forces
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
02:40MO Theory and Covalent Bonding
The molecular orbital theory describes the distribution of electrons in molecules in a manner similar to the distribution of electrons in atomic orbitals. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital. Mathematically, the linear combination of atomic orbitals (LCAO) generates molecular orbitals. Combinations of in-phase atomic orbital wave functions result in regions with a high probability of electron density, while...
02:58Crystal Field Theory - Octahedral Complexes
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...
02:18Network Covalent Solids
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...
02:56Intermolecular Forces and Physical Properties