Cu–citric acid metal–organic framework: Synthesis, characterization and catalytic application in Suzuki–Miyaura cross‐coupling reaction and oxidation of sulfides

Abstract

Citric acid with three carboxylic groups was used as an outstanding chelating agent was utilized for the preparation of Cu–citric acid metal–organic framework (Cu–CA–MOF). The prepared MOF was characterized by FT‐IR, XRD, EDS, AAS, SEM, WDX and BET analysis. N2 adsorption–desorption isotherms indicated acceptable BET surface area for Cu–CA–MOF. SEM images were shown that Cu–CA–MOF has geometric polyhedral shapes. Also, catalytic activity of Cu–CA–MOF successfully examined for the Suzuki–Miyaura cross‐coupling reaction and chemoselective oxidation of sulfides to sulfoxides.

A novel cubic Zn‐citric acid‐based MOF as a highly efficient and reusable catalyst for the synthesis of pyranopyrazoles and 5‐substituted 1H‐tetrazoles

“…These absorption peaks were not observed in the spectra of the prepared Zn‐CA‐MOFs, whereas the Zn‐CA‐MOF spectrum showed two absorption peaks related to the vibration of the C=O bonds of aliphatic carboxylic acid groups at 1560 cm −1 . [ 44 ] The carbonyl absorption peak shifts, from 1703 cm −1 in the pure citric acid to the lower wavenumber (1560 cm −1 ) in the final Zn‐CA‐MOFs, represent the interaction between Zn and citric acid (Figure 1c). In addition, the peaks at the region of 2922–2999 cm −1 are the most important peaks that can be regarded as the characteristic of the aliphatic C─H stretching vibrations.…”

“…The obtained results effectively coincide with XRD patterns simulated from powder X-ray data of porous Zn-based MOFs with a cubic crystal phase, showing that the structure agrees with the literature reports. [45][46][47] The EDX spectrum results indicate the presence of Zn (9.53 W %), O (45.17 W %), carbon (32.48 W %), and nitrogen (12.52 W %) species in the obtained porous Zn-CA-MOFs' catalyst (Figure 3). These observations support the high purity of the prepared catalyst.…”

Noble‐metal free Suzuki–Miyaura reaction catalyzed by magnetically recyclable MOF composites

“…According to some recent studies, two catalyst sites may act collaboratively under the catalytic conditions [17,44]. A possible mechanism is proposed in Scheme 2.…”

Silica sulfuric acid coated on SnFe2O4MNPs: synthesis, characterization and catalytic applications in the synthesis of polyhydroquinolines

“…1 Catalysis science is considered as the main center of most key organic reactions such as the named reactions, 10,11 most of the key organic functional group transformations require a catalyst in the reaction media to the selective conversion of the reagents and synthons to the target products with high performance. 9,[12][13][14] In this sense, the utilization of heterogeneous nanomaterials as catalysts has attracted worldwide attention due to their unique role in the conversion of these manufacturing procedures to ecofriendly, greener, economical and viable methods. [15][16][17][18][19][20] During recent decades, acid catalysts have played the main role in the organic functional group transformations especially in multicomponent reactions, despite the widespread use of organic and inorganic acid catalysts, the leaching of hazardous acids into the desired product is one of the negative aspects of employing heterogeneous acid-based catalysts in the sustainable catalysis.…”