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Article Dans Une Revue Journal of Physical Chemistry Letters Année : 2018

Resolving the Framework Position of Organic Structure-Directing Agents in Hierarchical Zeolites via Polarized Stimulated Raman Scattering

Résumé

The direct synthesis of hierarchically intergrown silicalite-1 can be achieved using a specific diquaternary ammonium agent. However, the location of these molecules in the zeolite framework, which is critical to understand the formation of the material, remains unclear. Where traditional characterization tools have previously failed, herein we use polarized stimulated Raman scattering (SRS) microscopy to resolve molecular organization inside few-micron-sized crystals. Through a combination of experiment and first-principles calculations, our investigation reveals the preferential location of the templating agent inside the linear pores of the MFI framework. Besides illustrating the attractiveness of SRS microscopy in the field of material science to study and spatially resolve local molecular distribution as well as orientation, these results can be exploited in the design of new templating agents for the preparation of hierarchical zeolites

Domaines

Matériaux
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Dates et versions

hal-01868390 , version 1 (05-09-2018)

Identifiants

Citer

Guillaume Fleury, Julian Steele, I.C. Gerber, Franck Jolibois, Pascal Puech, et al.. Resolving the Framework Position of Organic Structure-Directing Agents in Hierarchical Zeolites via Polarized Stimulated Raman Scattering. Journal of Physical Chemistry Letters, 2018, 9 (7), pp.1778-1782. ⟨10.1021/acs.jpclett.8b00399⟩. ⟨hal-01868390⟩
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