2024 : 4 : 14
Mohammad Yaser Masoomi

Mohammad Yaser Masoomi

Academic rank: Assistant Professor
ORCID: https://orcid.org/0000-0003-1329-5947
Education: PhD.
ScopusId: 36927960900
Faculty: Science
Address: Arak University
Phone:

Research

Title
Enhanced Catalytic Performance of Quasi-HKUST-1 for the Tandem Imine Formation
Type
JournalPaper
Keywords
Imine formation, Partial deligandation, Pore engineering, Quasi metal-organic frameworks, Tandem catalysis
Year
2021
Journal Chemistry—A European Journal
DOI
Researchers mino baghery ، Arianna Melillo ، Belen Ferrer ، Mohammad Yaser Masoomi ، Hermenegildo Garcia

Abstract

Copper-based metal-organic framework (Cu3(BTC)2(H2O)3]n·nH2OMeOH (HKUST-1) has been subjected to thermolysis under air atmosphere at different temperatures ranging from 100 to 300°C. This treatment produces the partial removal of ligands, the generation of structural defects and additional porosity in a controlled way. The resulting defective materials denoted according to the literature as quasi-MOFs, were subsequently employed as heterogeneous catalysts in the one pot synthesis of N-benzylideneaniline from aniline and benzyl alcohol in open air as terminal oxidant at 70°C under base- and dehydrating agent-free conditions. The Q-HKUST catalysts calcined at 240°C (QH-240) was the most efficient in the series, promoting imine synthesis. Data from Knoevenagel condensation of malononitrile shows that in QH-240 the distances of Cu ions in HKUST-1 cavities are preserved, increasing the Knoevenagel activity, but a strong rearrangement takes place at 300°C or above. The unsaturated copper active sites with simultaneous presence of micro- and mesopores in QH-240 are responsible for this excellent catalytic performance. The effective parameters on catalytic activity of QH-240 including deligandation temperature, the amount of catalyst, the ratio of reactants, and reaction temperature as well as the stability and recyclability of the catalyst were also investigated. The possible mechanism used by QH-240 follows alcohol aerobic oxidation and subsequent anaerobic condensation of aldehyde intermediate with aniline.