FLUORESCENCE OF PYRENE IN SOL-GEL SILICA DERIVED FROM TRIETHOXYSILANE

被引:47
作者
MATSUI, K [1 ]
TOMINAGA, M [1 ]
ARAI, Y [1 ]
SATOH, H [1 ]
KYOTO, M [1 ]
机构
[1] SUMITOMO ELECT IND LTD,BASIC HIGH TECHNOL RES LABS,SAKAE KU,YOKOHAMA 244,JAPAN
关键词
D O I
10.1016/0022-3093(94)90325-5
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The fluorescence of pyrene probe molecules was measured in a sol-gel reaction system of triethoxysilane (HTEOS)/tetraethoxysilane (TEOS). There was minimal change in the ratio of the intensity of the third peak to the first peak (I3/I1) for the fluorescence spectra in the starting sol-gel solutions for various mixtures of HTEOS and TEOS. On the contrary, I3/I1 in silica xerogels increased linearly as HTEOS increased. These results indicate that the solvent composition mainly determines the environmental polarity of pyrene probes in initial solutions, while the HTEOS composition determines the polarity in xerogels, and that those silica xerogels derived from HTEOS are hydrophobic. The infrared spectra of these xerogels suggests that the hydrophobic character of the xerogels derived from HTEOS is largely ascribed to the reduction of Si-OH groups and adsorbed water molecules on these groups.
引用
收藏
页码:295 / 300
页数:6
相关论文
共 33 条
[1]   THE NATURE OF THE SILICA CAGE AS REFLECTED BY SPECTRAL CHANGES AND ENHANCED PHOTOSTABILITY OF TRAPPED RHODAMINE-6G [J].
AVNIR, D ;
LEVY, D ;
REISFELD, R .
JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (24) :5956-5959
[2]   FLUORESCENCE-SPECTRA OF PYRENE AND HUMIDITY EFFECTS ON THEM DURING THE SOL-TO-GEL-TO-XEROGEL TRANSITIONS OF MIXED SILICON ALUMINUM ALKOXIDE SYSTEMS [J].
FUJII, T ;
MURAYAMA, K ;
NEGISHI, N ;
ANPO, M ;
WINDER, EJ ;
NEU, DR ;
ELLIS, AB .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1993, 66 (03) :739-747
[3]   ABSORPTION AND FLUORESCENCE-SPECTRA OF RHODAMINE-B MOLECULES ENCAPSULATED IN SILICA-GEL NETWORKS AND THEIR THERMAL-STABILITY [J].
FUJII, T ;
ISHII, A ;
ANPO, M .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1990, 54 (02) :231-237
[4]  
GLASER RH, 1988, POLYM BULL, V19, P51
[5]   SPECTROSCOPY OF LASER-DYE OXAZINE-170 IN SOL-GEL GLASSES [J].
GVISHI, R ;
REISFELD, R .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1991, 128 (01) :69-76
[6]  
HUANG HH, 1985, POLYM BULL, V14, P557
[7]   2ND-ORDER OPTICAL NONLINEARITY ON A MODIFIED SOL-GEL SYSTEM AT 100-DEGREES-C [J].
JENG, RJ ;
CHEN, YM ;
JAIN, AK ;
KUMAR, J ;
TRIPATHY, SK .
CHEMISTRY OF MATERIALS, 1992, 4 (05) :972-975
[8]   ENVIRONMENTAL EFFECTS ON VIBRONIC BAND INTENSITIES IN PYRENE MONOMER FLUORESCENCE AND THEIR APPLICATION IN STUDIES OF MICELLAR SYSTEMS [J].
KALYANASUNDARAM, K ;
THOMAS, JK .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1977, 99 (07) :2039-2044
[9]   THERMAL EVOLUTION OF GELS DERIVED FROM CH3SI(OC2H5)3 BY THE SOL-GEL METHOD [J].
KAMIYA, K ;
YOKO, T ;
TANAKA, K ;
TAKEUCHI, M .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1990, 121 (1-3) :182-187
[10]   STRUCTURAL-CHANGES ALONG THE SOL-GEL-XEROGEL TRANSITION IN SILICA AS PROBED BY PYRENE EXCITED-STATE EMISSION [J].
KAUFMAN, VR ;
AVNIR, D .
LANGMUIR, 1986, 2 (06) :717-722