Dichroic crystal

Details Dichroic crystal Dichroic crystal

1996-04-17

1997-08-12

Dean, Ralph H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540140, 540141, C09B 4704

Patent

active

056567510

ABSTRACT:
Disclosed is a dichroic crystal including at least one member selected from the group consisting of phtharocyanine, a phtharocyanine derivative, phtharocyanine with a central metal introduced therein, a phtharocyanine derivative with a central metal introduced therein, and iodine. It is precipitated when the iodine is added to a solution containing the member, and it includes the iodine in a form of I.sub.3.sup.- and I.sub.5.sup.- ions. It not only has a high dichroic property but also superb heat resistance and weatherability, so that it is applicable to suspended particles display devices used in severe environments.

REFERENCES:
patent: 5350843 (1994-09-01), Itoh et al.
patent: 5358813 (1994-10-01), Iijima et al.
Sielcken et al., "Iodine Doped Phthalocyanines" (1990) J. Royal Neth. Chem. Soc., (109), 230-234.
Ogawa et al., "Phthalocyanine Derivative" (1989) Thin Solid Films, (178), 439-443.
Ichinose et al., "Liquid Crystal Phthalocyanines", (1991) Mol. Cryst. Lig. Cryst., (203), 25-31.
Schramm et al., "Properties of Iodine Phthalcyanines" (1980), J. Am.Chem. Soc., (102), 6702-6713.
Schock et al., "Conductive Oxidized Metallomacrocyles", (1979), J. Am. Chem. Soc., (101), 7071-7073.
Diel et al., "Cofacial Metallomacrocycles," (1983) J. Am Chem. Soc., (105), 1551-1567.
Dimrk et al., "Cofacial Metallmalocycles", (1983) J. Am Chem. Soc. (105), 1539-1550.
CA Registry No. 122532-10-9, First Three References Cited.
Sielcken et al., "Iodine-Doped Crowed Phthalocyanines", (1990) CA#113: 15610.
Ichinose et al., "LC Alignment w/ Phthalocyanide Devices", (1991) CA#115:124196.

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