Video Experimental Relacionado

Updated: Jun 19, 2026

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

Published on: October 10, 2016

Propiedades de síntesis y almacenamiento de hidrógeno de Be{12) {OH) {12) {1,3,5-benzenetribenzoato) {4)

Kenji Sumida¹, Matthew R Hill, Satoshi Horike

¹Department of Chemistry, University of California, Berkeley, California 94720-1460, USA.

Journal of the American Chemical Society

|October 6, 2009

Resumen

Los investigadores sintetizaron el primer marco orgánico metálico basado en berilio, un material altamente poroso con una superficie excepcional. Este nuevo marco demuestra un potencial significativo para aplicaciones eficientes de almacenamiento de hidrógeno.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Química Inorgánica La Química Inorgánica es la química inorgánica.
Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

Las estructuras metálicas orgánicas (MOF) son materiales cristalinos con estructuras porosas ajustables.
Los MOF de gran superficie son cruciales para las aplicaciones de almacenamiento y separación de gases.
Los MOF basados en berilio no han sido reportados previamente.

Objetivo del estudio:

Para sintetizar el primer marco orgánico-metálico basado en berilio cristalino.
Para caracterizar sus propiedades estructurales y superficie.
Para evaluar su potencial para el almacenamiento de hidrógeno.

Principales métodos:

Síntesis hidrotermal que incluye nitrato de berilio y ácido 1,3,5-benzenetribenzoico (H(3) BTB).
Caracterización mediante difracción de rayos X y mediciones de adsorción de gases (superficie BET).
Las isotermas de adsorción de hidrógeno (H2O) se midieron a 77 K y 298 K.

Principales resultados:

Síntesis exitosa de un nuevo MOF basado en berilio, Be{12) }{OH}{12) }{BTB}{4) (1).
El MOF exhibe una estructura de anillo sin precedentes en forma de silla de montar [Be(12) ((OH) ((12))) ((12+) que forma un 3,12 neto.
Logró un área de superficie BET récord de 4030 m2 / g, la más alta para el grupo principal o marcos orgánicos covalentes.
Se ha demostrado una excelente capacidad de almacenamiento de hidrógeno: 1,6 wt % a 1 bar/77 K, 9,2 wt % a 100 bar/77 K, y 2,3 wt % a 298 K.

Conclusiones:

Se ha sintetizado el primer MOF basado en berilio, que exhibe una porosidad excepcional.
Este material muestra una promesa significativa como medio de almacenamiento de hidrógeno de alta capacidad.
La estrategia sintética puede allanar el camino para una nueva clase de estructuras de berilio de gran superficie.

Más Videos Relacionados

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Versatile CO₂ Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique

The Synthesis of [Sn₁₀(Si(SiMe₃)₃)₄]²^- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique

Published on: November 28, 2016

Videos de Conceptos Relacionados

Structure of Benzene: Molecular Orbital Model

Structure of Benzene: Molecular Orbital Model

According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...

Stability of Conjugated Dienes

Stability of Conjugated Dienes

Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.

Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride

Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride

Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...

NMR Spectroscopy of Benzene Derivatives

NMR Spectroscopy of Benzene Derivatives

Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling constants depend...

Hybridization of Atomic Orbitals I

Hybridization of Atomic Orbitals I

The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...