Diamenodinitroazo dyes

Details Diamenodinitroazo dyes Diamenodinitroazo dyes

1990-05-15

1991-11-26

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534856, 534859, 564441, 252586, C09B 2901, C09B 29085, C07C24508

Patent

active

050683187

ABSTRACT:
The invention relates to compounds of formula I ##STR1## wherein R.sup.1 is C.sub.12 -C.sub.30 alkyl, R.sup.2 is hydrogen or C.sub.1 -C.sub.30 alkyl, R.sup.3 is C.sub.1 -C.sub.3 -alkyl or C.sub.1 -C.sub.3 alkoxy, R.sup.4 may have one of the meanings of R.sup.3 or is halogen, k and n are each independently of the other 0, 1 or 2, and R.sup.5 and R.sup.6 are each independently of the other C.sub.1 -C.sub.4 alkyl, any of which alkyl groups as defined herein may also be partly fluorinated or perfluorinated, with the proviso that R.sup.1 is alkyl of not less than 18 carbon atoms if R.sup.2 is hydrogen or alkyl of less than 12 carbon atoms.
From these compounds it is possible to prepare molecular aggregates, especially LB layer systems, which have reversible thermochromic and solvatochromic properties. The invention also relates to intermediates of formula II ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and n are as defined above.

REFERENCES:
patent: 3148179 (1964-09-01), Carboni
Imazeki et al., Thin Solid Films, vol. 134, pp. 27-34 (1985).
Kunitake et al., Thin Solid Films, vol. 121, pp. L89-L91 (1984).
Laschbwsky, Dissertation, p. 13 Mainz (1986).
Shimomura et al., Ber. Bunsbenges Phys. Chem., vol. 87, pp. 1134-1143 (1983).
Schuster, Diplomarbeit, pp. 18-19, Mainz (1986).
Small et al., SPIE, vol. 682, pp. 160-169 (1986).
SPIE, vol. 682, pp. 97-100 (1986).

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