The effect of acid catalysts on the structure and properties of zirconia-based hybrid organic-inorganic thin films obtained by sol-gel, starting from γ-glycidoxypropyl-trimethoxysilane (GLYMO) and zirconium n-propoxide Zr(C3H7)4, is studied by means of micro-Raman spectroscopy. The kind of network formed during the polymerisation process depends on the catalyst: this modifies the reactivity of the organic moiety of the GLYMO and a glass former behaviour is obtained only when the epoxy ring of the GLYMO is cleaved. Unopened epoxy rings, on the other hand, may protect the guest luminescent molecules, like the azo-dyes, to acid attacks. Nitric and acetic acids are reported as examples. © 2001 Elsevier Science B.V. All rights reserved.

Bersani, D., Lottici, P., Casalboni, M., Prosposito, P. (2001). Structural changes induced by the catalyst in hybrid sol-gel films: A micro-Raman investigation. MATERIALS LETTERS, 51(3), 208-212 [10.1016/S0167-577X(01)00291-9].

Structural changes induced by the catalyst in hybrid sol-gel films: A micro-Raman investigation

CASALBONI, MAURO;PROSPOSITO, PAOLO
2001-01-01

Abstract

The effect of acid catalysts on the structure and properties of zirconia-based hybrid organic-inorganic thin films obtained by sol-gel, starting from γ-glycidoxypropyl-trimethoxysilane (GLYMO) and zirconium n-propoxide Zr(C3H7)4, is studied by means of micro-Raman spectroscopy. The kind of network formed during the polymerisation process depends on the catalyst: this modifies the reactivity of the organic moiety of the GLYMO and a glass former behaviour is obtained only when the epoxy ring of the GLYMO is cleaved. Unopened epoxy rings, on the other hand, may protect the guest luminescent molecules, like the azo-dyes, to acid attacks. Nitric and acetic acids are reported as examples. © 2001 Elsevier Science B.V. All rights reserved.
2001
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/03 - FISICA DELLA MATERIA
Settore FIS/07 - FISICA APPLICATA (A BENI CULTURALI, AMBIENTALI, BIOLOGIA E MEDICINA)
English
GLYMO; Micro-Raman; Organically modified silanes; Polymerization; Sol-gel technique; Thin films; Materials Science (all)
Bersani, D., Lottici, P., Casalboni, M., Prosposito, P. (2001). Structural changes induced by the catalyst in hybrid sol-gel films: A micro-Raman investigation. MATERIALS LETTERS, 51(3), 208-212 [10.1016/S0167-577X(01)00291-9].
Bersani, D; Lottici, P; Casalboni, M; Prosposito, P
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/130987
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