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Microcrystallization of benzene-d(6) in mesoporous silica revealed by H-2 solid-state nuclear magnetic resonance

Masierak, W. and Emmler, T. and Gedat, E. and Schreiber, A. and Findenegg, G. H. and Buntkowsky, G. (2004):
Microcrystallization of benzene-d(6) in mesoporous silica revealed by H-2 solid-state nuclear magnetic resonance.
108, In: Journal of Physical Chemistry B, (49), pp. 18890-18896. [Article]

Abstract

Benzene-d(6) confined in a mesoscopically organized, controlled, porous-glass mesocellular foam (MCF), with a pore diameter of 30 nm, is studied by low-temperature solid-state H-2 nuclear magnetic resonance (H-2 NMR) spectroscopy in the temperature range of 90-180 K. The resulting spectra are compared to bulk benzene-d(6) and benzene confined in a mesoporous silica (SBA-15). The comparison shows that the spectra in the MCF are the superposition of an amorphous surface phase and a crystalline inner bulk phase. For the inner crystalline phase, the activation energies coincide with that of bulk benzene. The pore volume and the filling factor indicate that approximately three molecular layers of benzene are present on the inner surfaces.

Item Type: Article
Erschienen: 2004
Creators: Masierak, W. and Emmler, T. and Gedat, E. and Schreiber, A. and Findenegg, G. H. and Buntkowsky, G.
Title: Microcrystallization of benzene-d(6) in mesoporous silica revealed by H-2 solid-state nuclear magnetic resonance
Language: English
Abstract:

Benzene-d(6) confined in a mesoscopically organized, controlled, porous-glass mesocellular foam (MCF), with a pore diameter of 30 nm, is studied by low-temperature solid-state H-2 nuclear magnetic resonance (H-2 NMR) spectroscopy in the temperature range of 90-180 K. The resulting spectra are compared to bulk benzene-d(6) and benzene confined in a mesoporous silica (SBA-15). The comparison shows that the spectra in the MCF are the superposition of an amorphous surface phase and a crystalline inner bulk phase. For the inner crystalline phase, the activation energies coincide with that of bulk benzene. The pore volume and the filling factor indicate that approximately three molecular layers of benzene are present on the inner surfaces.

Journal or Publication Title: Journal of Physical Chemistry B
Volume: 108
Number: 49
Uncontrolled Keywords: nmr-spectroscopy water-molecules rabbit lens dynamics diffusion surface mcm-41 h-1-nmr functionalization hexamethylbenzene
Divisions: 07 Department of Chemistry
07 Department of Chemistry > Physical Chemistry
Date Deposited: 27 Oct 2014 20:46
Official URL: http://apps.webofknowledge.com/full_record.do?product=WOS&se...
Additional Information:

877DT Times Cited:26 Cited References Count:51

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