Photochromic bis-naphthopyran compounds and methods for...

Details Photochromic bis-naphthopyran compounds and methods for... Photochromic bis-naphthopyran compounds and methods for...

2005-09-06

2005-09-06

Saeed, Kamal A. (Department: 1626)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

C544S061000, C544S150000, C546S209000, C546S280400, C546S282700, C548S527000, C549S013000, C549S389000

Reexamination Certificate

active

06939007

ABSTRACT:
The invention provides photochromic bis-naphthopyran compounds as well as methods for their manufacture and their use. The bis-naphthopyran compounds of the invention exhibit a wide range of color, i.e., from pink to purple to blue gray, upon activation by a source of UV light. Additionally, the bis-naphthopyran compounds of the present invention exhibit broad coloration ability, fast response as to both color change on activation and return to original color, and good fatigue-resistance.

REFERENCES:
patent: 6281366 (2001-08-01), Frigoli et al.
patent: WO 96/01884 (1996-01-01), None
Moustrou, Corinne et al., “Synthesis of Thiophene-Substituted 3H-Naphtho[2,1-b]pyrans, Precursors of Photomodulated Materials”, Helvetica Chimica Acta, Verlag Helvetica Chimica Acta, Basel, CH, vol. 81, No. 7, pp. 1293-1302 (1998).
Samat, Andre et al., “Synthesis and Unexpected Photochemical Behaviour of Biphotochromic Systems Involving Spiroxazines and Naphthopyrans Linked by an Ethylenic Bridge”, Tetrahedron, Elsevier Science Publishers, Amsterdam, NL, vol. 57, No. 34, pp. 7349-7359 (2001).
Yassar, A. et al., “Molecular Switch Devices Realised By Photochromic Oligothiophenes”, Synthetic Metals, vol. 124, No. 1, pp. 23-27 (2001).
Zhao, Weili et al., “A Smart Photochromophore Through Synergistic Coupling fo Photochromic Subunits”, Journal of the American Chemical Society, vol. 124, No. 8, pp. 1582-1582 (2002).

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