Matches in SemOpenAlex for { <https://semopenalex.org/work/W2038363648> ?p ?o ?g. }
Showing items 1 to 86 of
86
with 100 items per page.
- W2038363648 endingPage "61" @default.
- W2038363648 startingPage "54" @default.
- W2038363648 abstract "We report here the use of zeolite-encapsulated metal (salpn) complexes as catalysts in the oxidation reaction of the natural compound carvacrol in acetonitrile with hydrogen peroxide as the oxidant. No previous studies on the oxidation of carvacrol in the presence of metal salpn complexes have been reported. By using a general flexible ligand method, Cr(III), Fe(III), Bi(III), Ni(II), and Zn(II) complexes of N,N‘-bis(salicylidene)propane-1,3-diamine (H2salpn) encapsulated in NaY zeolite were prepared. All catalysts were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) analyses to confirm the complex encapsulation. The activities of all prepared catalysts for the oxidation of carvacrol and hydrogen peroxide were tested. The performances of all catalysts were compared on the basis of the leaching test results and carvacrol conversions. Thymohydroquinone and benzoquinones were observed as byproducts at high conversions of carvacrol. No product was formed in the absence of a catalyst. Fe(salpn)-NaY catalyst exhibited the highest carvacrol conversion of 27.6% with a yield of 22.0%, followed by Cr(salpn)-NaY catalyst with 23.5% carvacrol conversion and a yield of 17.6%. Other catalysts have shown relatively lower performances in terms of carvacrol conversion and leaching. The Cr(salpn)-NaY catalyst was found to be a more efficient catalyst than others on the basis of leaching and activity tests. With the selected catalyst Cr (salpn)-NaY, the effects of temperature and carvacrol/hydrogen peroxide molar ratio on carvacrol oxidation reactions were investigated. Increasing the temperature from 40 to 60 °C caused an increase in the thymoquinone yield from 6.2% to 16.0%. An increase in carvacrol/hydrogen peroxide molar ratio from 1 to 3 resulted in a decrease in the thymoquinone yield." @default.
- W2038363648 created "2016-06-24" @default.
- W2038363648 creator A5011003955 @default.
- W2038363648 creator A5016084446 @default.
- W2038363648 creator A5019043337 @default.
- W2038363648 date "2005-11-08" @default.
- W2038363648 modified "2023-10-18" @default.
- W2038363648 title "Liquid-Phase Oxidation of Carvacrol Using Zeolite-Encapsulated Metal Complexes" @default.
- W2038363648 cites W1987035107 @default.
- W2038363648 cites W1987798411 @default.
- W2038363648 cites W2000912938 @default.
- W2038363648 cites W2004962137 @default.
- W2038363648 cites W2035493448 @default.
- W2038363648 cites W2035749357 @default.
- W2038363648 cites W2052381108 @default.
- W2038363648 cites W2055028809 @default.
- W2038363648 cites W2070150826 @default.
- W2038363648 cites W2093937284 @default.
- W2038363648 cites W2119884521 @default.
- W2038363648 cites W229320091 @default.
- W2038363648 cites W247952694 @default.
- W2038363648 cites W4231288448 @default.
- W2038363648 doi "https://doi.org/10.1021/ie050185o" @default.
- W2038363648 hasPublicationYear "2005" @default.
- W2038363648 type Work @default.
- W2038363648 sameAs 2038363648 @default.
- W2038363648 citedByCount "10" @default.
- W2038363648 countsByYear W20383636482014 @default.
- W2038363648 countsByYear W20383636482016 @default.
- W2038363648 countsByYear W20383636482017 @default.
- W2038363648 countsByYear W20383636482018 @default.
- W2038363648 countsByYear W20383636482022 @default.
- W2038363648 countsByYear W20383636482023 @default.
- W2038363648 crossrefType "journal-article" @default.
- W2038363648 hasAuthorship W2038363648A5011003955 @default.
- W2038363648 hasAuthorship W2038363648A5016084446 @default.
- W2038363648 hasAuthorship W2038363648A5019043337 @default.
- W2038363648 hasBestOaLocation W20383636482 @default.
- W2038363648 hasConcept C13965031 @default.
- W2038363648 hasConcept C159390177 @default.
- W2038363648 hasConcept C159750122 @default.
- W2038363648 hasConcept C161790260 @default.
- W2038363648 hasConcept C178790620 @default.
- W2038363648 hasConcept C179104552 @default.
- W2038363648 hasConcept C185592680 @default.
- W2038363648 hasConcept C2778077586 @default.
- W2038363648 hasConcept C2780676017 @default.
- W2038363648 hasConcept C39432304 @default.
- W2038363648 hasConcept C4937899 @default.
- W2038363648 hasConcept C533411734 @default.
- W2038363648 hasConcept C90982505 @default.
- W2038363648 hasConceptScore W2038363648C13965031 @default.
- W2038363648 hasConceptScore W2038363648C159390177 @default.
- W2038363648 hasConceptScore W2038363648C159750122 @default.
- W2038363648 hasConceptScore W2038363648C161790260 @default.
- W2038363648 hasConceptScore W2038363648C178790620 @default.
- W2038363648 hasConceptScore W2038363648C179104552 @default.
- W2038363648 hasConceptScore W2038363648C185592680 @default.
- W2038363648 hasConceptScore W2038363648C2778077586 @default.
- W2038363648 hasConceptScore W2038363648C2780676017 @default.
- W2038363648 hasConceptScore W2038363648C39432304 @default.
- W2038363648 hasConceptScore W2038363648C4937899 @default.
- W2038363648 hasConceptScore W2038363648C533411734 @default.
- W2038363648 hasConceptScore W2038363648C90982505 @default.
- W2038363648 hasIssue "1" @default.
- W2038363648 hasLocation W20383636481 @default.
- W2038363648 hasLocation W20383636482 @default.
- W2038363648 hasOpenAccess W2038363648 @default.
- W2038363648 hasPrimaryLocation W20383636481 @default.
- W2038363648 hasRelatedWork W1985147233 @default.
- W2038363648 hasRelatedWork W1987090948 @default.
- W2038363648 hasRelatedWork W1994137655 @default.
- W2038363648 hasRelatedWork W1998727627 @default.
- W2038363648 hasRelatedWork W2001911070 @default.
- W2038363648 hasRelatedWork W2018544762 @default.
- W2038363648 hasRelatedWork W2036187990 @default.
- W2038363648 hasRelatedWork W2045287968 @default.
- W2038363648 hasRelatedWork W2952678824 @default.
- W2038363648 hasRelatedWork W4205442022 @default.
- W2038363648 hasVolume "45" @default.
- W2038363648 isParatext "false" @default.
- W2038363648 isRetracted "false" @default.
- W2038363648 magId "2038363648" @default.
- W2038363648 workType "article" @default.