Homoleptic gallium(III) and indium(III) aminoalkoxides as precursors for sol-gel routes to metal oxide nanomaterials.
Identifieur interne : 001E51 ( Main/Exploration ); précédent : 001E50; suivant : 001E52Homoleptic gallium(III) and indium(III) aminoalkoxides as precursors for sol-gel routes to metal oxide nanomaterials.
Auteurs : RBID : pubmed:19319402Abstract
New homoleptic aminoalkoxides of gallium(III) and indium(III) of the types M4{(OC2H4)2NMe}6 [M = Ga (1), In (2)] and [Ga{(OC2H4)3N}]n (3), as well as a previously described Ga2(OC2H4NMe2)6 (A) have been prepared by isopropoxo(chloro)-aminoalkoxo exchange reactions and characterised by elemental analyses, FT-IR and 1H NMR spectroscopy. Formation of a star-shaped Ga[Ga{mu-eta3:eta1-(OC2H4)2NMe}2]3 (1.4CHCl3) and a zigzag linear In4{mu-eta3:eta1-(OC2H4)2NMe}6 (2.6CHCl3), as revealed by X-ray single crystal structures, reflects the structural diversity among N-methyldiethanolaminate derivatives. Their hydrolyses in boiling water, either in presence or absence of tetraalkylamonium bromide, have been studied and, for gallium derivatives, compared with similar hydrolytic reactions of Ga(OiPr)3. The hydrolysed products were studied by FT-IR, TG-DTA and XRD techniques. For gallium derivatives, transition from orthorhombic Ga(O)OH phase of as-prepared powder to phase pure rhombohedral- and monoclinic-Ga2O3 occurred at about 500 degrees C and 700 degrees C, respectively, whereas cubic In(OH)3 phase of as-prepared powder of 2 was converted to cubic In2O3 at 250 degrees C. Partial hydrolyses were also performed and evolution of the particle size in solution was recorded by light scattering measurements. Various sol-gel processing parameters such as concentration and hydrolysis ratio (h) were studied in order to stabilise nano-sized colloidal suspensions for access to thin films by spin coating. The N-methyldiethanolamine derivatives 1 and 2 were found to be the most suitable candidates for sol-gel processing. The transparent Ga2O3 and In2O3 films obtained on glass or Si wafers from spin-coating of 1 and 2, respectively, were characterised by SEM, EDX and XRD.
DOI: 10.1039/b818974a
PubMed: 19319402
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Homoleptic gallium(III) and indium(III) aminoalkoxides as precursors for sol-gel routes to metal oxide nanomaterials.</title><author><name sortKey="Mishra, Shashank" uniqKey="Mishra S">Shashank Mishra</name><affiliation wicri:level="3"><nlm:affiliation>Université Lyon1, IRCELYON, 2 av. Albert Einstein, 69626 Villeurbanne, France. mishrashashank74@rediffmail.com</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Université Lyon1, IRCELYON, 2 av. Albert Einstein, 69626 Villeurbanne</wicri:regionArea><placeName><region type="region" nuts="2">Rhône-Alpes</region><settlement type="city">Villeurbanne</settlement></placeName></affiliation></author><author><name sortKey="Daniele, Stephane" uniqKey="Daniele S">Stéphane Daniele</name></author><author><name sortKey="Petit, Sarah" uniqKey="Petit S">Sarah Petit</name></author><author><name sortKey="Jeanneau, Erwann" uniqKey="Jeanneau E">Erwann Jeanneau</name></author><author><name sortKey="Rolland, Marc" uniqKey="Rolland M">Marc Rolland</name></author></titleStmt><publicationStmt><date when="2009">2009</date><idno type="doi">10.1039/b818974a</idno><idno type="RBID">pubmed:19319402</idno><idno type="pmid">19319402</idno><idno type="wicri:Area/Main/Corpus">001F57</idno><idno type="wicri:Area/Main/Curation">001F57</idno><idno type="wicri:Area/Main/Exploration">001E51</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">New homoleptic aminoalkoxides of gallium(III) and indium(III) of the types M4{(OC2H4)2NMe}6 [M = Ga (1), In (2)] and [Ga{(OC2H4)3N}]n (3), as well as a previously described Ga2(OC2H4NMe2)6 (A) have been prepared by isopropoxo(chloro)-aminoalkoxo exchange reactions and characterised by elemental analyses, FT-IR and 1H NMR spectroscopy. Formation of a star-shaped Ga[Ga{mu-eta3:eta1-(OC2H4)2NMe}2]3 (1.4CHCl3) and a zigzag linear In4{mu-eta3:eta1-(OC2H4)2NMe}6 (2.6CHCl3), as revealed by X-ray single crystal structures, reflects the structural diversity among N-methyldiethanolaminate derivatives. Their hydrolyses in boiling water, either in presence or absence of tetraalkylamonium bromide, have been studied and, for gallium derivatives, compared with similar hydrolytic reactions of Ga(OiPr)3. The hydrolysed products were studied by FT-IR, TG-DTA and XRD techniques. For gallium derivatives, transition from orthorhombic Ga(O)OH phase of as-prepared powder to phase pure rhombohedral- and monoclinic-Ga2O3 occurred at about 500 degrees C and 700 degrees C, respectively, whereas cubic In(OH)3 phase of as-prepared powder of 2 was converted to cubic In2O3 at 250 degrees C. Partial hydrolyses were also performed and evolution of the particle size in solution was recorded by light scattering measurements. Various sol-gel processing parameters such as concentration and hydrolysis ratio (h) were studied in order to stabilise nano-sized colloidal suspensions for access to thin films by spin coating. The N-methyldiethanolamine derivatives 1 and 2 were found to be the most suitable candidates for sol-gel processing. The transparent Ga2O3 and In2O3 films obtained on glass or Si wafers from spin-coating of 1 and 2, respectively, were characterised by SEM, EDX and XRD.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">19319402</PMID><DateCreated><Year>2009</Year><Month>03</Month><Day>25</Day></DateCreated><DateCompleted><Year>2009</Year><Month>06</Month><Day>04</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">1477-9226</ISSN><JournalIssue CitedMedium="Print"><Issue>14</Issue><PubDate><Year>2009</Year><Month>Apr</Month><Day>14</Day></PubDate></JournalIssue><Title>Dalton transactions (Cambridge, England : 2003)</Title><ISOAbbreviation>Dalton Trans</ISOAbbreviation></Journal><ArticleTitle>Homoleptic gallium(III) and indium(III) aminoalkoxides as precursors for sol-gel routes to metal oxide nanomaterials.</ArticleTitle><Pagination><MedlinePgn>2569-77</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1039/b818974a</ELocationID><Abstract><AbstractText>New homoleptic aminoalkoxides of gallium(III) and indium(III) of the types M4{(OC2H4)2NMe}6 [M = Ga (1), In (2)] and [Ga{(OC2H4)3N}]n (3), as well as a previously described Ga2(OC2H4NMe2)6 (A) have been prepared by isopropoxo(chloro)-aminoalkoxo exchange reactions and characterised by elemental analyses, FT-IR and 1H NMR spectroscopy. Formation of a star-shaped Ga[Ga{mu-eta3:eta1-(OC2H4)2NMe}2]3 (1.4CHCl3) and a zigzag linear In4{mu-eta3:eta1-(OC2H4)2NMe}6 (2.6CHCl3), as revealed by X-ray single crystal structures, reflects the structural diversity among N-methyldiethanolaminate derivatives. Their hydrolyses in boiling water, either in presence or absence of tetraalkylamonium bromide, have been studied and, for gallium derivatives, compared with similar hydrolytic reactions of Ga(OiPr)3. The hydrolysed products were studied by FT-IR, TG-DTA and XRD techniques. For gallium derivatives, transition from orthorhombic Ga(O)OH phase of as-prepared powder to phase pure rhombohedral- and monoclinic-Ga2O3 occurred at about 500 degrees C and 700 degrees C, respectively, whereas cubic In(OH)3 phase of as-prepared powder of 2 was converted to cubic In2O3 at 250 degrees C. Partial hydrolyses were also performed and evolution of the particle size in solution was recorded by light scattering measurements. Various sol-gel processing parameters such as concentration and hydrolysis ratio (h) were studied in order to stabilise nano-sized colloidal suspensions for access to thin films by spin coating. The N-methyldiethanolamine derivatives 1 and 2 were found to be the most suitable candidates for sol-gel processing. The transparent Ga2O3 and In2O3 films obtained on glass or Si wafers from spin-coating of 1 and 2, respectively, were characterised by SEM, EDX and XRD.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Mishra</LastName><ForeName>Shashank</ForeName><Initials>S</Initials><Affiliation>Université Lyon1, IRCELYON, 2 av. Albert Einstein, 69626 Villeurbanne, France. mishrashashank74@rediffmail.com</Affiliation></Author><Author ValidYN="Y"><LastName>Daniele</LastName><ForeName>Stéphane</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Petit</LastName><ForeName>Sarah</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Jeanneau</LastName><ForeName>Erwann</ForeName><Initials>E</Initials></Author><Author ValidYN="Y"><LastName>Rolland</LastName><ForeName>Marc</ForeName><Initials>M</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2009</Year><Month>02</Month><Day>13</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Dalton Trans</MedlineTA><NlmUniqueID>101176026</NlmUniqueID><ISSNLinking>1477-9226</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="aheadofprint"><Year>2009</Year><Month>2</Month><Day>13</Day></PubMedPubDate><PubMedPubDate PubStatus="epublish"><Year>2009</Year><Month>3</Month><Day>23</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2009</Year><Month>3</Month><Day>26</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2009</Year><Month>3</Month><Day>26</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2009</Year><Month>3</Month><Day>26</Day><Hour>9</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1039/b818974a</ArticleId><ArticleId IdType="pubmed">19319402</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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