در هنگام جستجو کلمه در قسمت عنوان میتوانید کلمات مورد جستجو را با کاراکتر (-) جدا کنید.
کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Inorganic Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Zeolite,Oxidation,Nanostructures,Heterogenized catalyst,Olefin
- چکیده:
- چکیده انگلیسی: Oxovanadium(IV), manganese(II) and copper(II) complexes of a Schiff base ligand derived from 2,4-dihydroxyacetophenone and 1,2-diaminocyclohexane have been encapsulated in the nanocavity of zeolite-Y by flexible ligand method and characterized by metal analysis, IR spectroscopic studies and X-ray diffraction patterns. The encapsulated complexes abbreviated here as CuL-Y, MnL-Y and VOL-Y catalyze the oxidation of various olefins using tert-butyl hydroperoxide (TBHP) as oxidant in good yield (α-methyl styrene: 75%). The catalytic activity of the encapsulated Schiff base complexes decreased in the order CuL-Y > VOL-Y > MnL-Y.
- انتشار مقاله: 23-03-1399
- نویسندگان: Saeed Rayati,Nasim Rafiee,Fatemeh Nejabat
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Catalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Schiff base,heterogeneous catalyst,MCM-41,Alkene Epoxidation
- چکیده:
- چکیده انگلیسی: A heterogeneous catalyst containing manganese Schiff base complex (derived from 2,4-dihydroxybenzadehyde and 1,2-phenylenediamine) is produced by covalent anchoring in MCM-41 matrix. The synthesized catalyst was characterized by X-ray diffraction pattern (XRD), inductivity coupled plasma (ICP), Fourier transform infrared (FT-IR) spectroscopy, N2 sorbtion-desorbtion isotherm and by transmission electron microscopy (TEM). The obtained catalyst was used in the epoxidation of alkenes with hydrogen peroxide. Furthermore, the effect of various parameters such as reaction time, temperature, amount of catalyst, oxidant and imidazole has been investigated. The catalyst reusability was investigated. Our result reveals that this catalyst shows high catalytic activity in the epoxidation of alkenes.
- انتشار مقاله: 04-08-1397
- نویسندگان: Hassan Zakeri,Saeed Rayati,Goldasteh Zarei,Ali Parsa,Forogh Adhami
- مشاهده
- جایگاه : پژوهشی
- مجله: Inorganic Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Zeolite,Oxidation,Nanostructures,Heterogenized catalyst,Olefin
- چکیده:
- چکیده انگلیسی: Oxovanadium(IV), manganese(II) and copper(II) complexes of a Schiff base ligand derived from 2,4-dihydroxyacetophenone and 1,2-diaminocyclohexane have been encapsulated in the nanocavity of zeolite-Y by flexible ligand method and characterized by metal analysis, IR spectroscopic studies and X-ray diffraction patterns. The encapsulated complexes abbreviated here as CuL-Y, MnL-Y and VOL-Y catalyze the oxidation of various olefins using tert-butyl hydroperoxide (TBHP) as oxidant in good yield (α-methyl styrene: 75%). The catalytic activity of the encapsulated Schiff base complexes decreased in the order CuL-Y > VOL-Y > MnL-Y.
- انتشار مقاله: 23-03-1399
- نویسندگان: Saeed Rayati,Nasim Rafiee,Fatemeh Nejabat
- مشاهده