Video Experimental Relacionado
Updated: Feb 26, 2026
06:40
Synthesis of a Water-soluble Metal–Organic Complex Array
Published on: October 8, 2016
12.0K
Hidrólisis de Precisión Guiada por Mecanismo de Metales de Transición Tempranos para Acceder a Clústeres de Oxo (de
Muhammed Jibin Parammal1, Jikson Pulparayil Mathew1, Alessandro Prescimone1
1Department of Chemistry, University of Basel, Basel, Switzerland.
Angewandte Chemie (International ed. in English)
|February 24, 2026
Resumen
Los investigadores desarrollaron un método de hidrólisis de precisión para sintetizar clústeres de oxo de zirconio y hafnio. Este nuevo método ofrece una ruta más eficiente, económica y sostenible para producir estos valiosos materiales a escala.
Área de la Ciencia:
- Ciencia de Materiales
- Química Inorgánica
- Nanotecnología
Sus antecedentes:
- Los clústeres de oxo de zirconio y hafnio son bloques de construcción cruciales para materiales avanzados como MOFs, objetos impresos en 3D y compuestos poliméricos.
- Los métodos de síntesis actuales para estos clústeres a menudo son ineficientes, se basan en el ensayo y error, lo que dificulta el diseño racional y la escalabilidad.
Objetivo del estudio:
- Rediseñar la síntesis de clústeres de oxo de zirconio y hafnio utilizando información sobre su mecanismo de formación.
- Lograr mayores velocidades de reacción, utilizar precursores económicos, emplear disolventes sostenibles y mejorar la economía atómica.
- Permitir la síntesis a escala de gramo a temperatura ambiente y ampliar la metodología a metales del grupo 5.
Principales métodos:
- Hidrólisis de precisión utilizando exactamente 1,33 equivalentes de agua para la hidrólisis controlada del metal.
- Síntesis de clústeres de oxo de carboxilato de Zr6 y carboxilato de Hf6 con varios carboxilatos (acetato, oleato, 2-metilbutanoato).
- Aplicación de hidrólisis de precisión para sintetizar clústeres de oxo de Zr/Hf bimetálicos y nuevos clústeres de oxo del grupo 5 (Nb8, Ta8).
Principales resultados:
- Se desarrolló una síntesis a escala de gramo y a temperatura ambiente para clústeres de oxo de Zr y Hf con eficiencia y sostenibilidad mejoradas.
- Se sintetizaron con éxito clústeres de oxo de oxo de Zr/Hf bimetálicos esquivos.
- Se amplió la síntesis racional de clústeres de oxo a elementos del grupo 5, produciendo nuevos clústeres de Nb8 y Ta8.
Conclusiones:
- La hidrólisis de precisión ofrece un enfoque racional y económico para la síntesis de clústeres de oxo.
- Este método permite la producción a escala multigramo, posicionándolo como un caballo de batalla potencial para la síntesis de clústeres de oxo.
- La estrategia desarrollada facilita el diseño y la producción de diversas arquitecturas de clústeres de oxo para diversas aplicaciones.
Palabras clave:
hafnioheterometálicoclústeres de oxo metáliconiobiohidrólisis de precisióntantaliozirconioMás Videos Relacionados
08:25Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
7.8K
09:45Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
10.9K
Videos de Conceptos Relacionados
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
13.1K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
13.1K
02:04Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
7.6K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
7.6K
00:56Extraction: Advanced Methods
1.2K
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
1.2K
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.9K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.9K
02:47Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
21.6K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
21.6K
03:00Preparation of Epoxides
9.5K
Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
9.5K