Exploring the Molecular Structure of Imidazolium-Silica-Based Nanoparticle Networks by Combining Solid-State NMR Spectroscopy and First-Principles Calculations
A DFT‐based molecular model for imidazolium–silica‐based nanoparticle networks (INNs) is presented. The INNs were synthesized and characterized by using small‐angle X‐ray scattering (SAXS), NMR spectroscopy, and theoretical ab initio calculations. 11B and 31P HETCOR CP MAS experiments were recorded....
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Published in | Chemistry : a European journal Vol. 20; no. 46; pp. 15188 - 15196 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
10.11.2014
WILEY‐VCH Verlag Wiley Subscription Services, Inc Wiley-VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | A DFT‐based molecular model for imidazolium–silica‐based nanoparticle networks (INNs) is presented. The INNs were synthesized and characterized by using small‐angle X‐ray scattering (SAXS), NMR spectroscopy, and theoretical ab initio calculations. 11B and 31P HETCOR CP MAS experiments were recorded. Calculated 19F NMR spectroscopy results, combined with the calculated anion–imidazolium (IM) distances, predicted the IM chain density in the INN, which was also confirmed from thermogravimetric analysis/mass spectrometry results. The presence of water molecules trapped between the nanoparticles is also suggested. First considerations on possible π–π stacking between the IM rings are presented. The predicted electronic properties confirm the photoluminescence emissions in the correct spectral domain.
Sourcing luminescence: Imidazolium–silica‐based nanoparticle networks (INNs) have been synthesized and characterized (see picture). A molecular model for the imidazolium–silica network is presented and described. The presence of water near the silica surface and its influence on the position of the counteranions in the INN has been shown. |
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Bibliography: | istex:2FC95AADF67DD3D96C35927B89D442E663269609 ark:/67375/WNG-HB2W294V-T PHC Amadeus 2012 ArticleID:CHEM201403730 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0947-6539 1521-3765 |
DOI: | 10.1002/chem.201403730 |