Abstract
The synthesis, optical spectroscopic properties, and lasing potential of 2,4,6-triphenylpyrylium chloride (PyCl) are reported. The synthesis involves conversion of Py-tosylate (instead of commonly used Py-perchlorate) to a pseudo-base, which is then transformed to PyCl by reacting with HCl. Solutions of the salt in different solvents absorb in the blue-near ultraviolet and emit in the blue-green spectral ranges with fluorescence quantum yield of 0.84 in acetonitrile. Under intense ultrashort laser pumping, salt solutions in acetonitrile, ethanol and methanol demonstrated stimulated emission and laser action with nominal feedback. Two-photon excited fluorescence was also observed.
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