caa a22 4500 469056738 CHVBK 20180323132845.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1163/156856792X00245 doi (NATIONALLICENCE)springer-10.1163/156856792X00245 Multiple fluorescence spectra and stable encapsulation of 7-hydroxy-4-methylcoumarin and rhodamine 6g in silicate glasses by the sol-gel method [Elektronische Daten] [T. Fujii, Y. Murata, M. Matsui] 7-Hydroxy-4-methylcoumarin(4-methylumbelliferone, HMC) and Rhodamine 6G(R6G) were encapsulated into silicate polymeric glass prepared by the sol-gel method under acidic, basic, and neutral conditions from tetraethyl orthosilicate. The fluorescence spectra of these molecules encapsulated into the xerogel state depend on the used catalysts. Three types of fluorescence emissions having peak wavelengths of ca. 390 nm, 470 nm, and 550 run, respectively, were observed simultaneously in the xerogel state composed of HMC and R6G which were prepared by acid catalysts. The encapsulated HMC remains stable for more than one year in the prepared xerogel. The results open the way to the development of simultaneous three-band laser emissions. The observation of the fluorescence spectrum of HMC is useful for a molecular level photophysical probe elucidating the structural changes oftetraethyl orthosilicate during sol to gel to xerogel transitions. Springer, 1992 Fujii T. Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 380, Wakasato, Nagano, Japan aut Murata Y. Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 380, Wakasato, Nagano, Japan aut Matsui M. Fundamental Research Department, Central Research Laboratory, Mitsubishi Cable Ind., Ltd., 660, Amagasaki, Hyogo, Japan aut Research on Chemical Intermediates Springer Netherlands 18/1(1992-03-01), 87-103 0922-6168 18:1<87 1992 18 11164 https://doi.org/10.1163/156856792X00245 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1163/156856792X00245 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fujii T. Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 380, Wakasato, Nagano, Japan aut NATIONALLICENCE 700 1- Murata Y. Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 380, Wakasato, Nagano, Japan aut NATIONALLICENCE 700 1- Matsui M. Fundamental Research Department, Central Research Laboratory, Mitsubishi Cable Ind., Ltd., 660, Amagasaki, Hyogo, Japan aut NATIONALLICENCE 773 0- Research on Chemical Intermediates Springer Netherlands 18/1(1992-03-01), 87-103 0922-6168 18:1<87 1992 18 11164 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer