Synthesis, characterization, and immobilization of nickel(II) tetradentate Schiff-base complexes on clay as heterogeneous catalysts for the oxidation of cyclooctene

Autor:	Abolfazl Bezaatpour, Mandana Amiri, Vahdat Jahed
Rok vydání:	2011
Předmět:	Schiff base Inorganic chemistry chemistry.chemical_element Infrared spectroscopy Heterogeneous catalysis Catalysis Nickel chemistry.chemical_compound chemistry Cyclooctene Polymer chemistry Materials Chemistry Physical and Theoretical Chemistry Selectivity Acetonitrile
Zdroj:	Journal of Coordination Chemistry. 64:1837-1847
ISSN:	1029-0389 0095-8972
DOI:	10.1080/00958972.2011.582582
Popis:	Nickel(II) tetradentate Schiff-base complexes of N,N′-(bis(pyridin-2-yl)formylidene)ethane-1,2-diamine (L1), N,N′-(bis(pyridin-2-yl)formylidene)cyclohexane-1,2-diamine (L2), N,N′-(bis(pyridin-2-yl)formylidene)benzene-1,2-diamine (L3), N,N′-(bis(pyridin-2-yl)formylidene)meso-stilben-1,2-diamine (L4), and N,N′-(bis(pyridin-2-yl)formylidene)propane-1,3-diamine (L5) were synthesized, characterized, and immobilized on sodium montmorillonite. The complexes were characterized by IR spectroscopy, diffuse reflectance spectra (DRS), and atomic absorption spectroscopy (AAS). IR and DRS data of the heterogeneous catalysts show that the Ni(II) complexes were physically entrapped within the sodium montmorillonite clay. The supported complexes show good catalytic activity for the epoxidation of cyclooctene using tert-butylhydroperoxide (TBHP) as oxygen source in acetonitrile. The Ni-catalyzed oxidation proceeds with 62.3% selectivity for epoxidation with 69% conversion for supported [Ni(L5)].
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3938a347641d506c7b1c25fb1dd507c1 https://doi.org/10.1080/00958972.2011.582582 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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