Fluorescence Properties of BDD Molecules Doped in Si-Ti Binary Oxide Systems by the Sol-Gel Method
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The characteristics of the fluorescence spectra of 2,5-bis(4-diethyl-aminophenyl)-1,3,4-oxadiazole(BDD) doped in Si-Ti binary oxides by the sol-gel method were investigated as a function of time in its transitions from sol to gel to xerogel. The characteristic BDD excimer fluorescence was observed during the transition from gel to xerogel only in a mixture of TEOS and TPOT but not in pure TEOS, indicating that the presence of a tetrahedrally coordinated titanium ion species plays a significant role in the formation of the excimer.
- Chemistry Letters
Chemistry Letters 1997(10), 1027-1028, 1997-10
The Chemical Society of Japan