Sol–gel synthesis of siloxane–oxide hybrid coatings [Si(CH3)2O·MOx: M = Si, Ti, Zr, Al] with luminescent properties
- 1 January 1992
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 2 (2) , 239-244
- https://doi.org/10.1039/jm9920200239
Abstract
Siloxane–oxide hybrid coatings have been prepared via the hydrolysis–condensation of diethoxydimethylsilane and various metallic alkoxides, M(OR)n with M = Si, Ti, Zr and Al. The rheological behaviour of the precursor sols and their hydrophobic character due to the presence of methyl groups, allows the formation of films several tens of micrometres thick, with no cracks. Preliminary structural characterizations are presented on the Ti-containing system using MAS NMR and X-ray absorption techniques. Rhodamine 6G and coumarin 4 have been embedded in these films. Some preliminary optical properties (absorption and emission) are presented. Most of the systems exhibit strong fluorescence, even for high dye concentration. This effect seems to be related to the particular structural nature of these matrices.Keywords
This publication has 22 references indexed in Scilit:
- Optical properties of transition metal oxide gelsPublished by SPIE-Intl Soc Optical Eng ,1990
- Interaction between host matrices and fluorescent species trapped in metal alkoxides derived gelsPublished by SPIE-Intl Soc Optical Eng ,1990
- Interactions between organic dyes and sol-gel matricesSolid State Ionics, 1989
- Fluorescence study of aluminosilicate sols and gels doped with hydroxy trisulfonated pyreneThe Journal of Physical Chemistry, 1989
- Sol-gel chemistry of transition metal oxidesProgress in Solid State Chemistry, 1988
- EXAFS: Basic Principles and Data AnalysisPublished by Springer Nature ,1986
- Organic fluorescent dyes trapped in silica and silica-titania thin films by the sol-gel method. Photophysical, film and cage propertiesJournal of Non-Crystalline Solids, 1985
- The nature of the silica cage as reflected by spectral changes and enhanced photostability of trapped Rhodamine 6GThe Journal of Physical Chemistry, 1984
- Gel technology in ceramicsJournal of Physics and Chemistry of Solids, 1984
- 29Si nuclear magnetic resonance studies of oligomeric and polymeric siloxanes: 4. Chemical shift effects of end-groupsPolymer, 1978