1,2-naphthalocyanine near-infrared absorbent and recording/displ

Details 1,2-naphthalocyanine near-infrared absorbent and recording/displ 1,2-naphthalocyanine near-infrared absorbent and recording/displ

1988-10-20

1990-10-02

Maples, John S.

Compositions

Liquid crystal compositions

Containing dopant salt

2522995, 252587, 252589, 252600, 2522991, 350 11, 350330, 540129, 540130, 540136, 540139, C09K 1958, C09B 4704

Patent

active

049605380

ABSTRACT:
Disclosed are near-infrared absorbents comprising 1,2-naphthalocyanine derivatives wherein the four naphthalene rings contained in the molecule independently have 1 to 6 substituents. Also disclosed is the use of these near-infrared absorbents in optical recording media, near-infrared absorption filters and display materials.

REFERENCES:
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patent: 4657554 (1987-04-01), Reinert et al.
patent: 4766054 (1988-08-01), Hirose et al.
patent: 4769307 (1988-09-01), Ozawa et al.
patent: 4783386 (1988-11-01), Nikles et al.
patent: 4784736 (1988-10-01), Lonsdale et al.
patent: 4814256 (1989-03-01), Aldag et al.
Dieng, M. et al., J. de Chimie Physique, 1987, 84, No. 4, p. 519.
Savy, M. et al., J. Electrochem Soc., Jul. 1982, p. 1409.
Hanack, M. et al., Chem. Ber. 121, 1479, 1988.

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