Quasi-Aromatic Heterocyclics as Laser Dyes
Interim technical rept.
NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA
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Superior laser dyes were recently discovered in the quasi-aromatic families of syn-dioxabimanes and pyrromethene-BF2 complexes. The representative new dye mu-bis-carboethoxy methylene-syn-methylene, methyl bimane lased at 507 nm with 50 greater efficiency than was obtained with Coumarin 30. A similar determination showed 4, 4-difluoro-1,3,5,7,8-pentamethyl-4-bora-3a,4a-diaza-s- indacene to lase at 546 nm with about 300 greater efficiency than was obtained from Coumarin 545. These quasi-aromatic systems are readily available and offer desirable properties of stability photo, thermal, and chemical, solubility, and diminished triplet-triplet absorption in the lasing spectral region. Selected spectroscopic and lasing properties of these new laser dyes are presented. Keywords Laser dyes Dye laser Quasi aromatic heterocyclics Heterocycles.
- Organic Chemistry
- Physical Chemistry