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Electrospray ionization in the study of the polycondensation of Ti(O-i-C3H7)4 and Ti(O-n-C4H9)4

✍ Scribed by Simone Cristoni; Lidia Armelao; Silvia Gross; Eugenio Tondello; Pietro Traldi

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
98 KB
Volume
14
Category
Article
ISSN
0951-4198

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✦ Synopsis

The polycondensation of Ti(O-i-C 3 H 7 ) 4 (1) and Ti(O-n-C 4 H 9 ) 4 (2), precursors widely employed in sol-gel processes, has been investigated by electrospray ionization mass spectrometry. By analysis of 10 Γ€6 M methanol solutions of compounds 1 and 2, the same ionic species are detected, proving that the first step in the polycondensation reaction is the i-propyl (or n-butyl) alcohol-methanol complete exchange. This reaction leads to the Ti(OCH 3 ) 4 (3) species, representing the synthon of the polycondensation. Various oligomers of 3 have been detected and characterized by MS/MS experiments, and the related mechanisms have been discussed. A minor oligomeric series due to hydroxyl-containing polycondensation products has also been characterized.

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