Oxovanadium(IV), copper(II) or cobalt(II) acetylacetone complexes immobilized on amino‐functionalized CMK‐3 for the aerobic epoxidation of styrene

Abstract

*Oxovanadium(IV), copper(II) and cobalt(II) acetylacetone complexes have been grafted onto amino-modified CMK-3-O (VO-NH 2 -CMK-3, Cu-NH 2 -CMK-3 and Co-NH 2 -CMK-3,respectively) and the materials thus prepared were used as heterogeneous catalysts for the aerobic oxidation of styrene. X-ray diffraction, nitrogen adsorption-desorption and transmission electron microscopy measurements confirmed the structural integrity of the mesoporous hosts, and spectroscopic characterization techniques (Fourier transform infrared, X-ray photoelectron, Raman) and thermogravimetry confirmed the ligands and the successful anchoring of the acetylacetone complexes to the modified mesoporous support. VO-NH 2 -CMK-3 displayed a relatively good catalytic performance with 94.6% of styrene conversion using air as oxidant, while Cu-NH 2 -CMK-3 gave 99.6% of styrene conversion using tert-butyl hydroperoxide as oxidant.

A Sensitive Luminescent Acetylacetone Probe Based on Zn‐MOF with Six‐Fold Interpenetration

“…Acetylacetone is widely employed because of its important industrial applications,s uch as its use as an intermediate and precursor ligand for organics ynthesis; [1][2][3][4] analytical reagent for extraction and separation;c helating agent or modifier in the sol-gel process; [5][6][7][8] solventf or non-aqueous redox-flow-batteries [9] and as an ovel absorber for selectiver emoval of formaldehyde. [10] However,a cetylacetone, as at oxic chemical, severely harms human health,r esulting in dizziness, nausea, andunconsciousnessw hen inhaled, ingested, or absorbedb yt he skin.…”

Oxido- and Dioxido-Vanadium(V) Complexes Supported on Carbon Materials: Reusable Catalysts for the Oxidation of Cyclohexane

“…These materials were mostly used in selective oxidation reactions, with moderate to good results being obtained. The most reported carbon supports for these vanadium complexes are modified graphene oxide [28,31,32,34], CNT [13,26,29] and CMK-3 mesoporous carbon [30,33]. The oxidation of 1-phenylethanol and benzhydrol afforded 96% yield of acetophenone and benzohydrazone, using functionalized CNT [13] and graphene [28], respectively, with excellent selectivities.…”

“…Supported oxidovanadium complexes were reported as being catalytically active towards selective oxidation reactions, such as alkanes and alcohols oxidation, styrene epoxidation, oxo-bromination, sulfur oxidation and others [1,2,8,13,14]. The most widely used supports in this context are silicas and zeolites, while examples of oxidovanadium complexes anchored on carbon supports are still scarce in the literature [4,[24][25][26][27][28][29][30][31][32][33][34].…”

Self‐Assembly of Lotus‐Type Holes Two‐Dimensional NiO Nanosheets and Its Efficient Catalytic Property for Styrene Epoxidation

“…So the carrier of catalyst also plays an important role in obtaining high catalytic activities. So far, carbon nanotube, activated carbon and CMK‐3 are some common supports . But it is difficult to convert homogeneous catalyst to heterogeneous catalyst, impregnation method and the formation of oxo‐bridges are the common to anchor catalyst on a solid surface which are not particularly satisfactory.…”