Heptamethine cyanine compound, near infrared absorbing ink, near

Details Heptamethine cyanine compound, near infrared absorbing ink, near Heptamethine cyanine compound, near infrared absorbing ink, near

1998-02-17

1999-10-26

Powers, Fiona T.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5462734, 5462774, C09B 2308, C07D41014, C07D41314, C07D41714

Patent

active

059731583

ABSTRACT:
A heptamethine cyanine compound is represented by the formula (I): in which each of Z.sup.1 and Z.sup.2 is an atomic group that forms a five or six-membered heterocyclic ring or a five or six-membered heterocyclic ring condensed with benzene ring or naphthalene ring; each of R.sup.1 and R.sup.2 is an alkyl group or a substituted alkyl group; each of Y.sup.1 and Y.sup.2 is carboxyl, a sulfonamido group or a sulfamoyl group; X is an anion; and n is 0 or 1. The present specification also discloses a near infrared absorbing ink, a near infrared absorbing sheet and a silver halide photographic material using the heptamethine cyanine compound as a near infrared absorbing dye.

REFERENCES:
patent: 4847385 (1989-07-01), Kusakata et al.
patent: 5260178 (1993-11-01), Harada et al.
patent: 5714307 (1998-02-01), Harada et al.

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