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Article: Catalytic conversion of methanol to larger organic molecules over crystalline forsterite: Laboratory study and astrophysical implications

TitleCatalytic conversion of methanol to larger organic molecules over crystalline forsterite: Laboratory study and astrophysical implications
Authors
KeywordsAstrochemistry
Catalysis
Crystalline silicate
DFT
Methanol
Issue Date2018
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/issn/24056758
Citation
Molecular Astrophysics, 2018, v. 13, p. 22-29 How to Cite?
AbstractLaboratory catalytic reactions of methanol over heated crystalline silicates (forsterite) lead to the formation of gas-phase olefinic and polycyclic aromatic hydrocarbon (PAH) molecules, and are of potential importance in astrophysical environments including hot molecular cores, protoplanetary disks and shocks. In our experiments the methanol reagent, together with intermediate and product gas-phase molecular species were detected using time-of-flight mass-spectrometry (TOF-MS). A solid deposited on the crystalline forsterite surface was examined subsequently using high-resolution transmission electron microscopy and thermal gravimetric techniques and found to comprise amorphous and graphitic carbon. The chemical players in this work – gas-phase methanol, crystalline silicates and PAHs, have been identified spectroscopically in a range of astrophysical environments including young and evolved stars, protoplanetary disks, comets, captured dust particles and meteorites. It is envisaged that reactions on bare dust grains as studied here both experimentally and theoretically through DFT calculations, can have implications for chemical transformations and conversions, in forming PAH molecules and potentially in the synthesis of prebiotic molecules.
Persistent Identifierhttp://hdl.handle.net/10722/266004
ISSN
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Q-
dc.contributor.authorDai, W-
dc.contributor.authorLiu, B-
dc.contributor.authorSarre, PJ-
dc.contributor.authorXie, MH-
dc.contributor.authorCheung, ASC-
dc.date.accessioned2018-12-17T02:16:30Z-
dc.date.available2018-12-17T02:16:30Z-
dc.date.issued2018-
dc.identifier.citationMolecular Astrophysics, 2018, v. 13, p. 22-29-
dc.identifier.issn2405-6758-
dc.identifier.urihttp://hdl.handle.net/10722/266004-
dc.description.abstractLaboratory catalytic reactions of methanol over heated crystalline silicates (forsterite) lead to the formation of gas-phase olefinic and polycyclic aromatic hydrocarbon (PAH) molecules, and are of potential importance in astrophysical environments including hot molecular cores, protoplanetary disks and shocks. In our experiments the methanol reagent, together with intermediate and product gas-phase molecular species were detected using time-of-flight mass-spectrometry (TOF-MS). A solid deposited on the crystalline forsterite surface was examined subsequently using high-resolution transmission electron microscopy and thermal gravimetric techniques and found to comprise amorphous and graphitic carbon. The chemical players in this work – gas-phase methanol, crystalline silicates and PAHs, have been identified spectroscopically in a range of astrophysical environments including young and evolved stars, protoplanetary disks, comets, captured dust particles and meteorites. It is envisaged that reactions on bare dust grains as studied here both experimentally and theoretically through DFT calculations, can have implications for chemical transformations and conversions, in forming PAH molecules and potentially in the synthesis of prebiotic molecules.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/issn/24056758-
dc.relation.ispartofMolecular Astrophysics-
dc.subjectAstrochemistry-
dc.subjectCatalysis-
dc.subjectCrystalline silicate-
dc.subjectDFT-
dc.subjectMethanol-
dc.titleCatalytic conversion of methanol to larger organic molecules over crystalline forsterite: Laboratory study and astrophysical implications-
dc.typeArticle-
dc.identifier.emailXie, MH: physhead@hku.hk-
dc.identifier.emailCheung, ASC: hrsccsc@hku.hk-
dc.identifier.authorityXie, MH=rp00818-
dc.identifier.authorityCheung, ASC=rp00676-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1016/j.molap.2018.09.002-
dc.identifier.scopuseid_2-s2.0-85053751706-
dc.identifier.hkuros296489-
dc.identifier.volume13-
dc.identifier.spage22-
dc.identifier.epage29-
dc.identifier.isiWOS:000451764200003-
dc.publisher.placeNetherlands-

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