Benzazole compounds with ESIPT fluorescence

Details Benzazole compounds with ESIPT fluorescence Benzazole compounds with ESIPT fluorescence

1994-09-02

1996-12-24

Tucker, Philip

Compositions

Light transmission modifying compositions

Ultraviolet

252582, 252587, 25230116, 25230117, 25230135, 548156, 548159, 548217, 548224, 5483051, F21V 904, C09K 1106, C07D27762

Patent

active

055871127

ABSTRACT:
A new class of proton transfer, benzazole, fluorescent compounds is composed of a 2-benzazolyl moiety covalently bonded to an aromatic fused ring heterocyclic moiety. The 2-benzazolyl moiety may be a 2-benzoxazolyl, 2-benzothiazolyl, or 2-benzimidazolyl. The aromatic fused ring heterocyclic moiety may be a 3-dibenzofuranyl or 3-dibenzothiophenyl each substituted at the 2 position with a proton donating group, or a 2-carbazolyl substituted at the 3 position with a proton donating group. The proton donating group may be hydroxy, sulfonamido, carbonamido, and the like, and preferably is hydroxy. The fluors are soluble in organic matrix materials such as solvents, monomers, resins, polymers, and the like. The UV-excited fluors emit short-lived fluorescence at .gtoreq.520 nm and may be used in the manufacture of fluorescent coatings, objects, scintillators, light sources and the like. The fluors are particularly useful for radiation-hard, solid scintillators for the detection and measurement of high energy particles and radiation and for UV filter materials.

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