Naphthalocyanine compounds

Details Naphthalocyanine compounds Naphthalocyanine compounds

1992-09-03

1993-12-14

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540140, C09B 4704

Patent

active

RE0344800

ABSTRACT:
Naphthalocyanine compounds represented by the general formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, are each a straight chain or branched chain alkyl group of 5 to 12 carbon atoms and M is a metal selected from the group consisting of Cu, Ni, Mg, Pb, Pd, V, Co, [Nb,] Al, Sn, In, Fe and Ge, or its oxide, chloride or bromide, are bluish green or green crystals and are superior in absorption or near infrared rays of 750 and 850 nm, highly resistant to light, heat, acids and alkalis, soluble in organic acids, liquid crystals and resins, and accordingly are very useful as a dyestuff capable of absorbing near infrared rays.

REFERENCES:
Mikhalenko et al., Chemical Abstracts, vol. 77 (1972) 116052n.
Beavan, Chemical Abstracts, vol. 97, (1982) 129504z.

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