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Determination of the structure of alkoxysilane polymers in solution by natural abundance two dimensional 29 Si‐ 29 Si INEPT DQF COSY NMR
Author(s) -
Lux Philippe,
Brunet Francine,
Desvaux Hervé,
Virlet Joseph
Publication year - 1993
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.1260310704
Subject(s) - chemistry , trimer , tetramer , condensation , polymer , abundance (ecology) , carbon 13 nmr , condensation reaction , polymer chemistry , analytical chemistry (journal) , computational chemistry , organic chemistry , dimer , thermodynamics , physics , fishery , biology , enzyme , catalysis
In order to determine the nature and the structure of polymers formed by condensation of alkoxysilanes, a two‐dimensional INEPT double quantum filtered COSY NMR experiment was developed to observe 29 Si 29 Si correlations at 29 Si natural abundance. This experiment was tested on a mixture containing a trimer, [(CH 3 ) 3 SiO] 2 Si(CH 3 ) 2 , and a tetramer, [(CH 3 ) 3 SiOSi(CH 3 ) 2 ] 2 O. This 2D INEPT DQF COSY experiment was then used to investigate the nature and the structure of the polymers which are formed in the early stages of the condensation reaction of diethoxydimethylsilane (DEDMS) in a DEDMS–water mixture containing a small amount of water at low pH (1.0).