Amphiphilic azo dyes and molecular aggregates thereof

Details Amphiphilic azo dyes and molecular aggregates thereof Amphiphilic azo dyes and molecular aggregates thereof

1988-07-06

1990-07-17

Higel, Floyd D.

Compositions

Light transmission modifying compositions

Displaying color change

252 70, 2524081, 252585, 252960, 252582, 264 13, 350371, 534573, 534856, 564441, C02B 2728, C09B 29085, C07C24508

Patent

active

049419978

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 14 Calkyl 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
Thin Solid Films, 134, 27-34 (1985), Imazaki et al.
Thin Solid Films, 121, L89-91 (1984), Kunitake et al.
Ber. Bunsenges. Phys. Chem., 87, 1134-43 (1983).
Andreas Schuster, Diplomarbeit, pp. 18-19, Mainz 1986.
Spie, vol. 682, 160-9 (1986), Small et al.
Spie, vol. 682, 97-100 (1986).
Andre Laschewky, Dissertation, p. 13, Mainz 1986.

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