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dc.contributor.authorCasado, Clara-
dc.contributor.authorGracia, Ismael-
dc.contributor.authorMayoral, Álvaro-
dc.contributor.authorLópez-Ram-de-Víu, Pilar-
dc.contributor.authorCoronas, Joaquín-
dc.identifierdoi: 10.1021/la300864n-
dc.identifierissn: 0743-7463-
dc.identifiere-issn: 1520-5827-
dc.identifier.citationLangmuir 28(16): 6638-6644 (2012)-
dc.description.abstractChiral ordered mesoporous silica (COMS) was synthesized in the presence of amino acid proline by combining tetraethyl orthosilicate and quaternized aminosilane silica sources. The as-prepared materials were activated by calcination or microwave chemical extraction to remove the organic templates. The powder X-ray diffraction and N 2 adsorption characterization revealed in COMS the structural and textural features of MCM-41-type silica. The chirality of the material was disclosed by mixed and separate l- and d-proline adsorption on the COMS prepared with l-proline (l-Pro-COMS) and d-proline (d-Pro-COMS). It was found that the maximum l-proline and d-proline adsorption capacities on l-Pro-COMS were ca. 2.3 and 0.6 mmol/g, respectively, while the adsorption of d-proline was higher than that of l-proline on d-Pro-COMS. Finally, both activation routes yielded enantioselective silicas able to separate proline racemate. © 2012 American Chemical Society.-
dc.description.sponsorshipFinancial support from the Spanish Ministry of Science and Innovation under Projects MAT2007-61028 and CTQ2008- 00187 and the Aragón Government (Grant GA-LC-019/2011) is gratefully acknowledged. C.C. also acknowledges a “Juan de la Cierva” grant from the Spanish Science and Innovation Ministry -
dc.publisherAmerican Chemical Society-
dc.titleL - and D-proline adsorption by chiral ordered mesoporous silica-
dc.description.versionPeer Reviewed-
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