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Optical energy transfer and trapping in 9-aminoacridine doped sol-gel glasses

✍ Scribed by Stéphan C. Laperrière; Joseph W. Mullens; Drew L'Espérance; Eric L. Chronister

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
859 KB
Volume
243
Category
Article
ISSN
0009-2614

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✦ Synopsis

Time-resolved fluorescence lifetime and depolarization results are presented for 9-aminoacridine (9AA) doped silicate (SX) and aluminosilicate xerogel (ASX) glasses. At low concentrations the dynamics are dominated by donor-donor energy transfer processes, however, energy trapping by aggregate species is observed at higher concentrations. In addition, a comparison of the anisotropy decay rates and the critical radius obtained from the spectral overlap indicates a significant excluded volume within the xerogel matrix. An unresolved fast anisotropy decay component for 9AA doped ASX may suggest a non-random spatial distribution of chromophores within the occupied restricted volume of the ASX matrix.

📜 SIMILAR VOLUMES

Electronic energy transfer and trapping
Electronic energy transfer and trapping in quinizarin-doped aluminosilicate sol—gel glasses
✍ Drew L'Espérance; Eric L. Chronister 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 687 KB

Time-resolved fluorescence lifetime and depolarization measurements are used to investigate electronic excitation energy transfer and trapping in quinizarin-doped aluminosilicate sol-gel glasses. At low quinizarin concentrations donor-donor electronic energy transfer is dominant, however, at higher