摘要:
Improved green-sensitivity is imparted to a photosensitive silver halide emulsion by a benzimidazolothiacarbocyanine dye of the formula: ##SPC1##Wherein R.sup.1 and R.sup.2 are lower alkyl; R.sup.3 is sulfoalkyl or carboxyalkyl each having an alkylene chain of from 1 to 4 carbon atoms inclusive; R.sup.4 is hydrogen, halogen, lower alkyl, lower carbalkoxy, lower alkoxy or acetamido; R.sup.5 is halogen, cyano or carbalkoxy; R.sup.6 is hydrogen or halogen; Y is an anion customary in the cyanine dye art; and n is 0 or 1.
摘要:
A CLASS OF ENERGY-SENSITIVE COMPOUNDS CONTAINING HETEROCYCLIC NITROGEN ATOMS SUBSTITUTED WITH AN -OR GROUP FRAGMENT UNDER THE INFLUENCE OF VARIOUS FORMS OF ENERGY TO FORM A DYE BASE, A PROTON AND AN ALDEHYDE, THESE MATERIALS BEING USEFUL IN IMAGE REPRODUCTION.
摘要:
Certain halogenated methine dyes make improved sensitizers for light-sensitive photographic layers containing the sensitizer and an image-producing compound capable of transfer at 80*-200*C. to an image-receiving layer in contact with the photographic layer, but rendered non-transferrable where exposed to light.
摘要:
Photographic materials of improved green sensitivity are described containing a light-sensitive silver halide emulsion and including, in combination, at least one monomethinecyanine dye of the general formula,
Wherein Y2 is a hydrogen atom or a lower alkyl group; Y3 is a hydrogen atom, a lower alkyl group, a lower alkoxyl group, a halogen atom or a phenyl group; W is a halogen atom or a phenyl group; R3 is a lower alkyl group; M is a hydrogen atom, an alkali metal atom or H.Q (where Q is an organic base); and n1 and n2 are individually 2, 3 or 4. Lower fog levels are also noted. Emulsions are detailed as well as materials utilizing such emulsions.
WHEREIN Y1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group; Z is S or Se; V is a hydrogen atom or a lower alkyl group; R1 is a lower alkyl group or a substituted alkyl group; R2 is a sulfoalkyl group or a carboxyalkyl group; X is an anion; and m is zero or 1, and at least one oxacarbocyanine dye of the general formula,
摘要:
NOVEL CYANINE DYES ARE PROVIDED WHICH FEATURE A 1,2DIARYLINDOLE NUCLEUS. LIGHT SENSITIVE SILVER HALIDE EMULSIONS CONTAINING THESE DYES ARE ALSO PROVIDED.
摘要:
A SPECTRALLY SENSITIZED SILVER HALIDE PHOTOGRAPHIC EMULSION, AND MORE PARTICULARLY A SILVER HALIDE PHOTOGRAPHIC EMULSION SUPERSENSITIZED BY THE COMBINED USE OF AT LEAST TWO SENSITIZING DYES RESULTING IN A HIGH RED SENSITIVITY.
摘要:
The present invention relates to photography and, more particularly, to a novel spectrally (optically) sensitized radiation recording photographic element which comprises a cyanine dye of the formula: WHEREIN L represents a methine group; m represents a positive integer of from 1 to 3, inclusive; Z and Z1 each represents the nonmetallic atoms necessary to complete a cyanine dye heterocyclic ring system containing a five or six membered heterocyclic nucleus; R and R1 each represents a divalent acylic cyclic group; X represents a quaternary ammonium, sulfonium or phosphonium group; Y represents a -SO3 or a -COO group; and W represents an anion.
摘要:
Formylmethylene dye intermediates are prepared by reacting a heterocyclic quaternary salt with a complex of dialkylformamide and inorganic acid halide followed by hydrolysis. Cyanine dyes are prepared by reacting such formylmethylene dye intermediates with heterocyclic quaternary salt.
摘要:
This invention relates to new polymethinoxanol dye-stuffs. They correspond to the formula
WHEREIN X is the residue of a heterocyclic ring system and R1 and R2 are hydrogen atoms or optionally substituted alkyl or aryl groups. They are useful for incorporation in photographic silver halide material and able to correct various deficiencies of such material.