RELAXATION BEHAVIOR OF NLO CHROMOPHORES GRAFTED IN HYBRID SOL-GEL MATRICES

被引：30
作者：
LEBEAU, B
MAQUET, J
SANCHEZ, C
TOUSSAERE, E
HIERLE, R
ZYSS, J
机构：
[1] UNIV PARIS 06, CHIM MAT CONDENSEE LAB, CNRS, URA 1466, F-75252 PARIS 05, FRANCE
[2] FRANCE TELECOM, CTR NATL ETUD TELECOMMUN, F-92225 BAGNEUX, FRANCE
来源：
JOURNAL OF MATERIALS CHEMISTRY | 1994年 / 4卷 / 12期
关键词：
D O I：
10.1039/jm9940401855
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Poled hybrid siloxane-oxide coatings synthesized through hydrolysis and condensation from tetramethoxysilane (TMOS) and N-[3-triethoxysilylpropyl]-2,4-dinitrophenylamine (TSDP) precursors have been characterized via second-harmonic generation (SHG), differential scanning calorimetry (DSC) and Si-29 magic-angle spinning nuclear magnetic resonance (MAS NMR) measurements. Depending on chemical composition the SHG values range between 2.5 and 10 pm V-1. The matrix rigidity seems to have a strong influence on the relaxation behaviour of the optically non-linear chromophores grafted in these hybrid networks. The glass-transition temperatures of the hybrid coatings increase with the TMOS content and the thermal curing time. These modifications can be explained by an increase in the condensation and degree of crosslinking of siloxane and silica species.
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页码：1855 / 1860
页数：6
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