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dc.contributor.authorDemirörs, A. F.en_US
dc.contributor.authorArslan, M.en_US
dc.contributor.authorDag, Ö.en_US
dc.date.accessioned2016-02-08T10:15:45Z
dc.date.available2016-02-08T10:15:45Z
dc.date.issued2007en_US
dc.identifier.issn1387-1811
dc.identifier.urihttp://hdl.handle.net/11693/23563
dc.description.abstractThe structure of the preformed LC mesophase of water:transition metal salt ([M(H2O)6]X2):acid (HX):oligo(ethylene oxide) (or Pluronics):tetramethylorthosilicate (TMOS) mixture during hydrolysis and partial polymerization of the silica source is maintained upon further polymerization and condensation of the silica species in the solid state. The liquid mixture in early stage of the silica polymerization could be casted or dip coated to a surface of a glass or silicon wafer to produce mesostructured silica monoliths and films, respectively. The silica species and ions (metal ions and anions) influence the structure of the LC mesophases (as a result, the structure of silica) and the hydrophilic and hydrophobic balance in the reaction media. The silica structure can be changed from hexagonal to cubic by increasing, for example, the nitrate salt concentration in the nitrate salt systems. A similar transformation takes place in the presence of very low perchlorate salt concentration. The salt concentration in the mesostructured silica can be increased up to 1.1/1.0 salt/SiO2 w/w ratio, in mesostructured silica materials by maintaining its lamella structure in P123 and cubic in the CnEOm systems. However, the materials obtained from the P123 systems undergo transformation from lamella to 2D hexagonal upon calcinations. The method developed in this work can be used to modify the internal surface of the pores with various transition metal ions and metal oxides that may find application in catalysis. © 2006 Elsevier Inc. All rights reserved.en_US
dc.language.isoEnglishen_US
dc.source.titleMicroporous and Mesoporous Materialsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.micromeso.2006.09.004en_US
dc.subjectLiquid crystalsen_US
dc.subjectMesostructureden_US
dc.subjectNon - ionic surfactantsen_US
dc.subjectPluronicsen_US
dc.subjectTransition metal ionsen_US
dc.subjectHydrolysisen_US
dc.subjectHydrophobicityen_US
dc.subjectSaltsen_US
dc.subjectPolymerizationen_US
dc.subjectSilicon wafersen_US
dc.subjectSurface active agentsen_US
dc.titleThe effect of anions of transition metal salts on the structure of modified mesostructured silica films and monolithsen_US
dc.typeArticleen_US
dc.departmentDepartment of Chemistryen_US
dc.citation.spage249en_US
dc.citation.epage257en_US
dc.citation.volumeNumber98en_US
dc.citation.issueNumber1-3en_US
dc.identifier.doi10.1016/j.micromeso.2006.09.004en_US
dc.publisherElsevieren_US


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