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Structure of a paramagnetic supermicroporous silica‐based material via a multinuclear solid‐state NMR monitoring
Author(s) -
Bakhmutov Vladimir I.,
Shpeizer Boris G.,
Clearfield Abraham
Publication year - 2007
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1927
Subject(s) - paramagnetism , chemistry , calcination , relaxation (psychology) , solid state , solid state nuclear magnetic resonance , nmr spectra database , nuclear magnetic resonance , spectral line , crystallography , analytical chemistry (journal) , catalysis , organic chemistry , condensed matter physics , psychology , social psychology , physics , astronomy
The paramagnetic Si/Al material doped with 19.8% (weight) of Mn 2+ has been characterized by the 1 H, 13 C, 27 Al, 29 Si MAS NMR spectra and the 1 H, 29 Si T 1 MAS relaxation measurements as a gel dried at 130 °C and as samples calcined at 504, 540 and 650 °C. It has been demonstrated that in spite of strong paramagnetic effects, NMR monitoring in combination with 29 Si T 1 relaxation experiments can be successful for structural descriptions of porous materials. Copyright © 2007 John Wiley & Sons, Ltd.