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Electrospray ionization in the study of sol‐gel processes: the polycondensation of Ti(O‐n‐Bu) 4 in the presence of Si(OEt) 4
Author(s) -
Cristoni Simone,
Armelao Lidia,
Gross Silvia,
Tondello Eugenio,
Traldi Pietro
Publication year - 2001
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.240
Subject(s) - chemistry , condensation polymer , electrospray ionization , methanol , electrospray , kinetics , mass spectrometry , ionization , polymer chemistry , medicinal chemistry , catalysis , organic chemistry , chromatography , ion , physics , quantum mechanics
The polycondensation of Ti(O‐n‐Bu) 4 in presence of Si(OEt) 4 (Et = C 2 H 5 , Bu = C 4 H 9 ) has been studied by electrospray ionization of their mixtures in methanol. Series of oligomers due to Ti(OMe) 4 (Me = CH 3 ) polycondensation have been detected and represent the most abundant species. This result can be explained by the ready alcoholysis of Ti(O‐n‐Bu) 4 and by its fast kinetics of oligomerization. However a series of Ti,Si‐containing oligomers, with molecular weights in the range 400–1300 Da, has also been detected. Their structures have been characterized by isotopic cluster analysis and MS/MS experiments, proving that they originate by reaction of Ti‐OH and Si‐OEt moieties. Copyright © 2001 John Wiley & Sons, Ltd.