Microwave‐assisted fabrication of a mixed‐ligand [Cu₄(μ₃‐OH)₂]‐cluster‐based metal–organic framework with coordinatively unsaturated metal sites for carboxylation of terminal alkynes with carbon dioxide

Abstract

The development of efficient and stable metal–organic framework (MOF) catalysts with coordinatively unsaturated metal sites for modern organic synthesis is greatly important. Herein, a robust [Cu4(μ3‐OH)2]‐cluster‐based MOF (Cu‐MOF) with a mixed‐ligand system was successfully fabricated by a microwave‐assisted method under mild conditions. The as‐prepared Cu‐MOF catalyst possessing unsaturated Cu (II) sites exhibited excellent catalytic activity toward the direct carboxylation of 1‐ethynylbenzene with CO2, and various propiolic acid derivatives were synthesized in moderate to good yields under optimized reaction conditions. Furthermore, the catalyst remained stable and could be easily recycled for five sequential runs without incredible decrease in catalytic efficiency.

Metal–organic frameworks (MOFs) for photoelectrocatalytic (PEC) reducing carbon dioxide (CO2) to hydrocarbon fuels

“…The microwave synthesis process is user-friendly, the reaction time is short (hours or minutes), the energy distribution is uniform, and the crystal size and morphology are easy to control. 98 Compared with other synthesis methods, this method adds precision instruments to control the microwave energy, but it is more environment-friendly and energy-saving while producing high yield and performance products. 99,100…”

Optical chemosensors based on metal organic frameworks for selective detection of hazardous pollutants: A review

“…Suction is then used to filter and dry precipitates. Some MOFs that were synthesized by using the microwave method are Fe-MIL-53, ZIF-8, Fe-MIL-101-NH2, MIL-100 and UiO-66 [83][84][85] .…”

Recent progress in strategies for preparation of metal-organic frameworks and their hybrids with different dimensions

“…They controlled the reaction time to probe the crystal formation process and applied them for the immobilization of atmospheric CO 2 due to their unique physical and structural properties. Chen et al synthesized MOF-74 (Ni) using MW-assisted, hydrothermal and condensation reflux methods, respectively [257] . By comparison, it was found that MW could shorten the synthesis time from 32 h and 24 h to 1 h, which greatly improved the reaction efficiency.…”