Afficher la notice abrégée

Direct Observation Of Siloxane Chirality on Twisted and Helical Nanometric Amorphous Silica

dc.contributor.authorOKAZAKI, Y.
dc.contributor.authorBUFFETEAU, T.
dc.contributor.authorSIURDYBAN, E.
dc.contributor.authorTALAGA, D.
dc.contributor.authorRYU, N.
dc.contributor.authorYAGI, R.
dc.contributor.authorPOUGET, E.
dc.contributor.authorTAKAFUJI, M.
dc.contributor.authorIHARA, H.
dc.contributor.authorODA, R.
dc.date.accessioned2020-09-03T07:56:10Z
dc.date.available2020-09-03T07:56:10Z
dc.date.issued2016
dc.identifier.issn1530-6984
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/10834
dc.description.abstractEnSynthesis of chiral inorganic or hybrid nanomaterials through sol-gel transcription of chiral organic templates has attracted a great deal of interest for more than a decade. However, the chiral nature of these inorganic matrices has never been directly observed. For the first time, we report a direct evaluation of chirality on noncrystalline silica chiral nanoribbons by vibrational circular dichroism (VCD) measurements. Strong Cotton effect around 1150-1000 cm-1 from Si-O-Si asymmetric stretching vibration was observed. Surprisingly, calcination of these hybrid nanoribbons doubled the intensity of Cotton effects. On the basis of transmission electron microscopy observations, IR, VCD, NMR, and Raman spectroscopies, we demonstrate that the silica chirality originates from twisted siloxane network composed of chiral arrangement of the Si-O-Si bonds. Our findings clearly prove the presence of chiral organization of amorphous silica network, making them very promising chiral platforms for chiral recognition, optical applications, or asymmetric catalysis.
dc.language.isoen
dc.title.enDirect Observation Of Siloxane Chirality on Twisted and Helical Nanometric Amorphous Silica
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.nanolett.6b02858
dc.subject.halChimie/Matériaux
bordeaux.journalNano Letters
bordeaux.page6411-6415
bordeaux.volume16
bordeaux.hal.laboratoriesInstitut de Chimie & de Biologie des Membranes & des Nano-objets (CBMN) - UMR 5248*
bordeaux.hal.laboratoriesInstitut de Chimie & de Biologie des Membranes & des Nano-objets (CBMN, UMR 5248)
bordeaux.issue10
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Nano%20Letters&rft.date=2016&rft.volume=16&rft.issue=10&rft.spage=6411-6415&rft.epage=6411-6415&rft.eissn=1530-6984&rft.issn=1530-6984&rft.au=OKAZAKI,%20Y.&BUFFETEAU,%20T.&SIURDYBAN,%20E.&TALAGA,%20D.&RYU,%20N.&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée