Pyrazino[2,3-c]-1,2,6-thiadiazine 2,2-dioxides: a new family of widely tunable, acid-base dye lasers.
Laser emission of different acid-base species of pyrazino[2,3-c]-1,2,6-thiadiazine 2,2-dioxides has been observed. Lasing energy efficiency and spectral and temporal characteristics in dimethyl sulfoxide (DMSO) and acetonitrile, pumped with a N(2) laser (3.7 ns, 0.5 mJ/pulse) in two different two-mirror resonators, have been measured. A very wide tuning range (110 nm) has been determined in the most efficient species, and the triplet-state influence on the species' laser emission was investigated. No photochemical degradation was detected. The deprotonation observed in DMSO in previous spectroscopic measurements did not contribute measurably to laser emission.
Weigand
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R
Guerra
J M
JM