• Analytical Science and Technology
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• v.10 no.3
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• pp.225-229
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• 1997

The stability of Rhodamine 6G Perchlorate(Rh6GP) doped in organically modified silicate(Ormosil) was investigated after the Ormosil was synthesized by sol-gel process. The composition of the Ormosil which makes organic dye molecules stable and dimer-free was decided from comparing absorption peaks of dye molecules in sol state, in wet gel and in completely dried gel. The stable and dimer-free Rh6GP doped in the Ormosil was achieved in the 0.1 molar ratio of HCl/TEOS.

• Journal of the Korean Ceramic Society
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• v.33 no.12
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• pp.1365-1372
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• 1996

In order to obtain a transparent and dimer-free Ormosil embedded with orgainc dye variations of gel struc-ture and optical properties were studied as a functiion of the change of gel composition. The Ormosils which have good optical property were produced in the 90/10 ratio of TEOS/PDMS and the structural variations of the gel were achived by the change of ratio of HCl/TEOS. As the ratio of HCl/TEOS was increased pore size of the Ormosil enlarged and porosity increased. Increasing HCl concentration led to gradually lower trans-mittance values. In the xerogel doped with the organic dye Rhodamine 6G perchlorate a dimer peak near 500nm was observed with the increase of the ratio of HCl/TEOS

• Analytical Science and Technology
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• v.7 no.1
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• pp.17-23
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• 1994

Through sol-gel process, inorganic/organic composite as a dye host was made. It was observed that this composite has about 90% of trnasmittance by UV/VIS spectrophotometer. The transmittance is the most important requirement to decide whether the composite could apply or not as the dye host. The transmittance was increased with decreasing HCl as a catalyst, aging time, and amount of PDMS. Also, fluorescent and transmittant charateristics of Rhodamine 6G Perchlorate that was doped into ORMOSIL were measured. The fluorescent intensity was increased and the trnasmittance was decreased with rising gelling temperature.