Video Experimental Relacionado
Updated: Jun 28, 2025
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
13.4K
Marco orgánico cristalino tridimensional estabilizado por uniones moleculares de mortaja y tenón
Xinru Sheng1,2, Zeju Wang1, Guan Sheng3
1Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China.
Journal of the American Chemical Society
|April 24, 2024
Resumen
Los investigadores desarrollaron un nuevo marco orgánico cristalino en 3D utilizando un método de unión de mortaja y tenón molecular. Este material poroso es prometedor para purificar el gas acetileno.
Área de la Ciencia:
- Ciencias de los materiales
- Química supramolecular
- La cristalografía
Sus antecedentes:
- Los marcos orgánicos cristalinos tridimensionales (3D) ofrecen diversas aplicaciones debido a sus estructuras complejas, altas superficies y bajas densidades.
- La construcción actual del marco a menudo se basa en bloques de construcción de poliedros o en la interpenetración de componentes, lo que limita la flexibilidad del diseño.
Objetivo del estudio:
- Para sintetizar un nuevo marco orgánico cristalino 3D utilizando un mecanismo de unión de muerta y tenón molecular único.
- Explorar las características estructurales y las aplicaciones potenciales de este nuevo marco.
Principales métodos:
- Síntesis de la estructura utilizando tetra ((4-piridilfenil) etileno y bis ((benzodioxaborol) cloro como bloques de construcción.
- Formación de enlaces de boro-nitrógeno (B-N) que impulsan el conjunto del marco.
- Análisis de difracción de rayos X monocristalino para elucidar la estructura del marco y la formación de canales.
Principales resultados:
- Se sintetizó con éxito un marco orgánico cristalino 3D a través de la articulación molecular de mortisa y tenón.
- La estructura presenta capas 2D con canales helicoidales formados por la coordinación B-N.
- Las unidades de diclorobenceno facilitan las conexiones de mortaja y tenón, entrelazando capas y estabilizando la estructura tridimensional.
- El marco resultante exhibe una alta porosidad y propiedades mecánicas robustas.
Conclusiones:
- La estrategia de unión de mortaja y tenón molecular proporciona un nuevo enfoque para la construcción de estructuras orgánicas cristalinas complejas en 3D.
- La porosidad y la resistencia mecánica del nuevo marco sugieren su utilidad potencial en la purificación de gases, específicamente para eliminar las impurezas del acetileno.
Videos de Conceptos Relacionados
02:22Structures of Solids
14.1K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
14.1K
02:58Crystal Field Theory - Octahedral Complexes
26.4K
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...
26.4K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.4K
02:06Newman Projections
16.8K
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
16.8K
02:37Metallic Solids
18.4K
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....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.4K
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