A double basic Sr-amino containing MOF as a highly stable heterogeneous catalyst. Issue 30 (11th July 2019)

• Record Type: Journal Article
• Authors: Leo, Pedro; Orcajo, Gisela; Briones, David; Rodríguez-Diéguez, Antonio; Choquesillo-Lazarte, Duane; Calleja, Guillermo; Martínez, Fernando
• Is Part Of: Dalton transactions. Volume 48:Issue 30(2019)
• Page Start: 11556
• Page End: 11564
• Publication Date: 2019-07-11
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9dt01061k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Sr(NH2 -bdc) is a new strontium-based MOF material that exhibits high activity in the Knoevenagel condensation which can be facilely separated and be reused without significant degradation. Abstract : A novel metal–organic framework (MOF) based on strontium alkaline-earth metal and 2-amino-1, 4-benzenedicarboxylic acid (NH2 -bdc) has been developed. This material is formed by a linear succession of face-sharing strontium polyhedra bridged by an organic ligand molecule to give a three-dimensional network with rhombohedral one-directional channels. This MOF is stable in polar organic solvents and up to 250 °C. The basic catalytic activity of both strontium metal nodes and amino groups of the ligand was tested in Knoevenagel condensation reactions. The influence of the temperature and reaction solvent over the catalytic performance of the MOF catalyst was demonstrated. The strontium/amino-containing MOF material evidenced a remarkable activity as compared to other conventional alkaline oxides typically used as reference basic solid catalysts. The novel MOF material showed remarkable activity and structural stability during five consecutive catalytic runs with no evidence of activity loss under the best reaction conditions found in this study.