16596-03-5Relevant articles and documents
Preparation of Fe3O4@C-dots as a recyclable magnetic nanocatalyst using Elaeagnus angustifolia and its application for the green synthesis of formamidines
Ghereghlou, Mahnaz,Esmaeili, Abbas Ali,Darroudi, Majid
, (2021/09/15)
This work describes a novel and simple procedure for successfully synthesizing formamidines by using Fe3O4@C-dots in the role of an effective and reusable catalyst throughout a solvent-free set-up. The formamidine derivatives were easily prepared through aromatic amines with triethyl orthoformate in the company of Fe3O4@C-dots. According to the experimental outcomes, the obtained formamidines in the presence of Fe3O4@C-dots exhibited good to high yield values. In the following, we distinguished the prepared catalyst by applying field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and vibrating sample magnetometer (VSM) techniques. Furthermore, the evaluation of catalytic activity was done in the course of synthesizing formamidine derivatives. Among the advantages of this method, one can highlight the facts of solvent-free conditions, the simplicity of operation, high yields, nonacidic catalyst, and the reusability of nanocatalyst for at least five cycles.
Bimetallic Paddlewheel-type Dirhodium(II,II) Acetate and Formamidinate Complexes: Synthesis, Structure, Electrochemistry, and Hydroformylation Activity
Casimiro, Anna,De Doncker, Stephen,Kotze, Izak A.,Ngubane, Siyabonga,Smith, Gregory S.
, p. 12928 - 12940 (2020/09/15)
Classical hydroformylation catalysts use mononuclear rhodium(I) complexes as precursors; however, very few examples of bimetallic systems have been reported. Herein, we report fully substituted dirhodium(II,II) complexes (C1-C6) containing acetate and diphenylformamidinate bridging ligands (L1-L4). The structure and geometry around these paddlewheel-type, bimetallic cores were confirmed by single-crystal X-ray diffraction. The complexes C3-C6 show electrochemical redox reactions, with the expected reduction (Rh24+/3+) and two oxidation (Rh24+/5+ and Rh25+/6+) electron transfer processes. Furthermore, the bimetallic complexes were evaluated as catalyst precursors for the hydroformylation of 1-octene, with the acetate-containing complexes (C1 and C2) showing near quantitative conversion (>99%) of 1-octene, excellent activity and chemoselectivity toward aldehydes (>98%), with moderate regioselectivity toward linear products. Replacement of the acetate with diphenylformamidinate ligands (complexes C3-C6) yielded moderate-to-good chemoselectivity and regioselectivity, favoring linear aldehydes.
Rational Design of Noncovalent Diamondoid Microporous Materials for Low-Energy Separation of C6-Hydrocarbons
Bury, Wojciech,Walczak, Anna M.,Leszczyński, Micha? K.,Navarro, Jorge A. R.
supporting information, p. 15031 - 15037 (2018/11/02)
Selective separation of gases/vapors with similar physicochemical properties involves energetically costly distillation processes. Alternative separation processes based on shape-selective molecular sieving, taking place on porous frameworks (or membranes
