Gallium naphthalocyanine dye
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Abstract
An IR-absorbing naphthalocyanine dye of formula (I) is described:
- wherein
- M is Ga(A1);
- A1 is an axial ligand selected from —OH halogen, —OR3, —OC(O)R4;
- R1 and R2 may be the same or different and are selected from hydrogen or C1-12 alkoxy;
- R3 is selected from C1-12 alkyl, C5-12 aryl, C5-12 arylalkyl or Si(Rx)(Ry)(Rz); and
- R4 is selected from C1-12 alkyl, C5-12 aryl or C5-12 arylalkyl
- Rx, Ry and Rz may be the same or different and are selected from C1-12 alkyl, C5-12 aryl, C5-12 arylalkyl, C1-12 alkoxy, C5-12 aryloxy or C5-12 arylalkoxy; and
- W is a sulfonic acid group, including salts thereof.
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Citations
6 Claims
- 1. An IR-absorbing naphthalocyanine dye of formula (I):
Specification