Environmentally sensitive compositions of matter based on 3H-flu

Details Environmentally sensitive compositions of matter based on 3H-flu Environmentally sensitive compositions of matter based on 3H-flu

1997-11-28

2000-03-21

Healy, Brian

Optical waveguides

Having particular optical characteristic modifying chemical...

385 12, 385 14, 385147, 252586, G02B 600, G02B 523

Patent

active

060411570

ABSTRACT:
The present invention relates to compounds and derived materials based on compositions of matter consisting of appropriately substituted 3H-fluoren-3-ylidenes shown in figure A wherein the large dots (.circle-solid.) represent specific substituents define in the invention. ##STR1## These compounds and derived materials are able to undergo substantial changes in their optical properties in response to environmental changes. Such compounds and materials, for example, undergo substantial changes in their optical emission and absorption as well as refraction in different environments. In addition, by virtue of their ability to undergo permanent changes in refraction on exposure to certain predetermined wavelengths of radiation, the compounds and materials are photoprocessable by conventional techniques for the fabrication of optical devices and circuits, for computer, telecommunications, entertainment, defense, and sensor applications. A major subclass of the subject compounds and materials possess strong luminescence, optical, absorption, and refraction in the near infrared region of the electromagnetic spectrum which permits ready integration into electronic, electrooptic, and optic solid state components, devices, and systems.

REFERENCES:
patent: 4316043 (1982-02-01), Cragoe et al.
patent: 5585042 (1996-12-01), Knowles
patent: 5645767 (1997-07-01), Van Gemert
patent: 5691442 (1997-11-01), Unroe et al.
patent: 5698141 (1997-12-01), Kumar

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