Benzazole compounds with ESIPT fluorescence
US5587112A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1994 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Sep 2, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.