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US 5,329,019 AGranted
Squaraine dye compounds
AssigneeSyntex (U.S.A.) Inc.
InventorsJohn Pease, Thomas L. Tarnowski, Donald Berger, Chiu C. Chang, Chun-Hua Chuang
Life of this patent
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Abstract
Novel squaraine dyes and compositions of matter containing such dyes are disclosed . The novel squaraine dyes have an absorption maximum greater than 600 nanometers and are particularly useful in conjunction with a helium/neon (He/Ne) laser. Some of the squaraine dyes are hydrophilic and are therefore water soluble or water compatible and others of the squaraine dyes are lipophilic.
Claims2
A compound of the formula ##STR38## wherein:
- Z is independently ##STR39## R.sub.12, R.sub.13, R.sub.14, and R.sub.15 are independently hydrogen, alkyl (1 to 4 carbon atoms),
- R.sub.10 and R.sub.11 are ##STR40## in R.sub.21 is hydrogen, or alkyl (1 to 4 carbon atoms) and v is 0 to 5 and
- .beta..sub.1 and .beta..sub.2 are independently hydrogen or alkoxy (1 to 4 carbon atoms).
A compound of the formula ##STR41## wherein:
- D is ##STR42## Y is ##STR43## Z is carbon;
- s is 2;
- R is independently selected from the group consisting of (a) hydrogen, (b) alkyl (1 to 4 carbon atoms), (c) alkyl substituted by one or more groups which are carboxy or --SO.sub.3 H, (d) alkyl-C(O)O-alkyl, (e) alkyl-C(O)NH-alkyl and (f) alkyl-C(O)N(alkyl).sub.2 wherein at least one R is (a) alkyl substituted by one or more groups which are carboxy or --SO.sub.3 H, (b) alkyl-C(O)O-alkyl, (c) alkyl-C(O)NH-alkyl or (d) alkyl-C(O)N(alkyl).sub.2.
Dependencies are inferred from the claim text.