Heterogenization of manganese porphyrin via hydrogen bond in zeolite imidazolate framework-8 matrix, a host–guest interaction, as catalytic system for olefin epoxidation

Abstract

A heterogenized meso-tetrakis(2,3-dihydroxyphenyl)porphyrinatomanganese(III) acetate at zeolite imidazolate framework-8 (T(2,3-OHP)PorMn@ZIF-8) is investigated for the catalytic olefin epoxidation reactions at room temperature. Heterogenization is accomplished through a non-classical hydrogen bond proposed between T(2,3-OHP)PorMn bearing O–H groups and C–H of the 2-methylimidazolate linkers in the ZIF-8 structure. The aforementioned compound is characterized by X-ray powder diffraction (XRD), atomic absorption spectroscopy (AAS), nitrogen adsorption−desorption, FT-IR spectroscopy, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and Raman spectroscopy. The catalytic system with rather high potential of reusability is proposed as a fairly efficient epoxidation catalyst compared to reports in homogeneous media.

Syntheses, crystal structures, photo-physical properties, antioxidant and antifungal activities of Mg(II) 4,4′-bipyridine and Mg(II) pyrazine complexes of the 5,10,15,20 tetrakis(4–bromophenyl)porphyrin

“…Porphyrins and their metal complexes were considered as active materials used in polyme rization [1][2][3] and they also exhibited important function as catalysts, in medicinal and pharmaceutical fields [4][5][6], and functional dyes and pigments [7]. For example, iron and manganese porphyrinic complexes were used as efficient catalysts for hydroxylation of alkanes and epoxidation of alkenes [8][9][10][11][12][13][14]. Having conjugated configuration, porphyrins and metalloporphyrins are remarkable precursors in supramolecular chemistry [15,16] and are considered as excellent components in the design of functional molecular materials with improved electrochemical and physical-chemical properties [16].…”