o,o'-Bridged oligophenylene laser dyes, dyestuff lasers and meth

Details o,o'-Bridged oligophenylene laser dyes, dyestuff lasers and meth o,o'-Bridged oligophenylene laser dyes, dyestuff lasers and meth

1988-08-22

1991-08-20

Niebling, John F.

Compositions

Organic luminescent material containing compositions

Scintillating or lasing compositions

25230121, 25230132, 548440, 585 27, 372 53, C09K 1106, H01S 320

Patent

active

050412388

ABSTRACT:
Disclosed are organic laser dyes and more particularly o,o'-bridged oligophenylene laser dyes which when excited to lase emit radiation in various ranges and especially in the ultraviolet and violet ranges, that is, from about 300 nm to about 420 nm, of the light spectrum. An organic laser dye of this invention comprises an oligophenylene having at least one biphenyl moiety bridged between adjacent ortho positions via a single atom or a plural of atom substituents of various sizes. In one most preferred embodiment, the substituent bonded to the phenyl moieties forming the bridge is a carbon atom free of benzylic hydrogens. The bridging substituent can also be other atoms or groups free of reactive substituents. In another most preferred embodiment, the o,o'-bridged oligophenylene laser dyes are free of vinylene groups bonded directly to the phenyl moieties forming the oligophenylene chains. The o,o'-bridged oligophenylene laser dyes of the present invention are provided with relatively high power output and have relatively long photochemical lifetimes. Also disclosed are dye lasers and methods of lasing.

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