Hierarchical PS/PANI nanostructure supported Cu(ii) complexes: facile synthesis and study of catalytic applications in aerobic oxidation

Abstract

Hierarchical heterogeneous copper catalysts were prepared by immobilization of a homogeneous copper(II) complex on the surface of polystyrene/polyaniline (PS/PANI) microspheres with oriented PANI nanofibers. EDX element maps and XPS spectra indicated that Cu 2+ ions strongly coordinated with PANI imine. PS/PANI@Cu(OSO 2 CF 3 ) 2 exhibited excellent catalytic activity for selective aerobic oxidation of alcohols and highly efficient aerobic epoxidation of alkenes under mild conditions. The supported copper(II) catalyst maintained high levels of conversion and selectivity in these reactions after six cycles and showed good stability.

CoFe2O4@SiO2@ Co (III) salen complex nanoparticle as a green and efficient magnetic nanocatalyst for the oxidation of benzyl alcohols by molecular O2

“…Co (III) salen complex was synthesized as reported in the literature . The homogeneous Co (III) salen complex was chemically grafted onto the surface of CoFe 2 O 4 @SiO 2 .…”

Synthesis of UiO-66-NH2 derived heterogeneous copper (II) catalyst and study of its application in the selective aerobic oxidation of alcohols

“…Molecular oxygen is a desirable oxidant due to its advantages of being inexpensive, safe and abundant [5]. Moreover, molecular oxygen reacts cleanly, forming only water as an environmentally friendly by-product [6,7]. Therefore, it is an attractive approach to use molecular oxygen for the oxidation of alcohols [8].…”

Monodispersed poly(4-vinylpyridine) spheres supported Fe(III) material: An efficient and reusable catalyst for benzylic oxidation

“…The use of traditional oxidation methods that require highly polluting or toxic reagents such as chromium reagents, manganese reagents or sodium chlorite has been discouraged due to environmental concerns [3][4]. Therefore oxidation promoted by catalyst is highly preferred, since oxidative catalysis is green, efficient and sustainable when environmentally friendly oxidants are used [5][6][7][8][9][10][11][12]. In the past decade, tremendous efforts have been devoted to homogeneous catalysts for benzylic oxidation [13][14].…”