Matches in SemOpenAlex for { <https://semopenalex.org/work/W4284702639> ?p ?o ?g. }
- W4284702639 endingPage "742" @default.
- W4284702639 startingPage "742" @default.
- W4284702639 abstract "Mesoporous zirconium-silicates have been prepared using two different methodologies, evaporation-induced self-assembly and solventless organometallic precursor dry impregnation of commercial SiO2. The samples were characterized by elemental analysis, XRD, N2 adsorption, TEM, DRS UV–vis and Raman spectroscopic techniques. The catalytic performance of the Zr-Si catalysts was assessed in the epoxidation of three representative alkenes, cyclohexene, cyclooctene and caryophyllene, as well as in the oxidation of methyl phenyl sulfide using aqueous hydrogen peroxide as a green oxidant, with special attention drawn to the structure/activity relationship and catalyst stability issues. The key factors which affect substrate conversion and epoxide selectivity have been defined. The catalysts with larger contents of oligomeric ZrO2 species revealed higher activity. The nature of alkene and, in particular, its molecular hindrance is crucial, since the adsorption of the epoxide product is the main factor leading to fast catalyst deactivation. In fact, bulky epoxides do not show this effect. After optimization, the oxidation of caryophyllene gave endocyclic monoepoxide with 77% selectivity at 87% alkene conversion. Methyl phenyl sulfoxide afforded 37% of sulfoxide and 63% of sulfone at 57% sulfide conversion. The nature of catalysis was truly heterogeneous and no Zr leaching was observed." @default.
- W4284702639 created "2022-07-08" @default.
- W4284702639 creator A5004316600 @default.
- W4284702639 creator A5005264267 @default.
- W4284702639 creator A5039709715 @default.
- W4284702639 creator A5055637580 @default.
- W4284702639 creator A5068170747 @default.
- W4284702639 creator A5073556854 @default.
- W4284702639 creator A5078309403 @default.
- W4284702639 creator A5084139569 @default.
- W4284702639 creator A5084636487 @default.
- W4284702639 date "2022-07-05" @default.
- W4284702639 modified "2023-09-27" @default.
- W4284702639 title "Alkene Epoxidation and Thioether Oxidation with Hydrogen Peroxide Catalyzed by Mesoporous Zirconium-Silicates" @default.
- W4284702639 cites W1936344293 @default.
- W4284702639 cites W1964264144 @default.
- W4284702639 cites W1965757306 @default.
- W4284702639 cites W1972406392 @default.
- W4284702639 cites W1979317086 @default.
- W4284702639 cites W1981673835 @default.
- W4284702639 cites W1982175365 @default.
- W4284702639 cites W1996756198 @default.
- W4284702639 cites W2004033062 @default.
- W4284702639 cites W2005978187 @default.
- W4284702639 cites W2006168389 @default.
- W4284702639 cites W2006547659 @default.
- W4284702639 cites W2016056067 @default.
- W4284702639 cites W2017063205 @default.
- W4284702639 cites W2020631050 @default.
- W4284702639 cites W2029162629 @default.
- W4284702639 cites W2029209118 @default.
- W4284702639 cites W2031225905 @default.
- W4284702639 cites W2032559767 @default.
- W4284702639 cites W2035314934 @default.
- W4284702639 cites W2036346608 @default.
- W4284702639 cites W2040581625 @default.
- W4284702639 cites W2041760002 @default.
- W4284702639 cites W2042132829 @default.
- W4284702639 cites W2044876245 @default.
- W4284702639 cites W2047631109 @default.
- W4284702639 cites W2049784943 @default.
- W4284702639 cites W2049849545 @default.
- W4284702639 cites W2054111649 @default.
- W4284702639 cites W2054992368 @default.
- W4284702639 cites W2055460837 @default.
- W4284702639 cites W2057377752 @default.
- W4284702639 cites W2058785698 @default.
- W4284702639 cites W2063060006 @default.
- W4284702639 cites W2069382643 @default.
- W4284702639 cites W2069743138 @default.
- W4284702639 cites W2071154102 @default.
- W4284702639 cites W2071850613 @default.
- W4284702639 cites W2072589446 @default.
- W4284702639 cites W2074319444 @default.
- W4284702639 cites W2076402399 @default.
- W4284702639 cites W2081509088 @default.
- W4284702639 cites W2087755418 @default.
- W4284702639 cites W2092558564 @default.
- W4284702639 cites W2092722352 @default.
- W4284702639 cites W2093045886 @default.
- W4284702639 cites W2096791069 @default.
- W4284702639 cites W2116076596 @default.
- W4284702639 cites W2127793558 @default.
- W4284702639 cites W2135184348 @default.
- W4284702639 cites W2171870069 @default.
- W4284702639 cites W2192259763 @default.
- W4284702639 cites W2201625538 @default.
- W4284702639 cites W2320220220 @default.
- W4284702639 cites W2324435012 @default.
- W4284702639 cites W2491717320 @default.
- W4284702639 cites W2499747149 @default.
- W4284702639 cites W2516995155 @default.
- W4284702639 cites W2626692997 @default.
- W4284702639 cites W2752630334 @default.
- W4284702639 cites W2768008091 @default.
- W4284702639 cites W2791038999 @default.
- W4284702639 cites W2802580550 @default.
- W4284702639 cites W2806260854 @default.
- W4284702639 cites W2892390405 @default.
- W4284702639 cites W2950808134 @default.
- W4284702639 cites W2950992008 @default.
- W4284702639 cites W2975764505 @default.
- W4284702639 cites W2988626493 @default.
- W4284702639 cites W3042862490 @default.
- W4284702639 cites W3126712626 @default.
- W4284702639 cites W3131558959 @default.
- W4284702639 cites W3195304685 @default.
- W4284702639 cites W3211837148 @default.
- W4284702639 cites W4248584654 @default.
- W4284702639 cites W4255320134 @default.
- W4284702639 cites W4298367961 @default.
- W4284702639 doi "https://doi.org/10.3390/catal12070742" @default.
- W4284702639 hasPublicationYear "2022" @default.
- W4284702639 type Work @default.
- W4284702639 citedByCount "3" @default.
- W4284702639 countsByYear W42847026392022 @default.
- W4284702639 countsByYear W42847026392023 @default.
- W4284702639 crossrefType "journal-article" @default.