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1 624 988

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A1

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Application

2273559/05, 1980-02-27

(22)

Actual filing date

1980-02-27

(45)

Published

1996-05-20

(72)

Inventor

Levkoev I.I.Formina L.V.Lifshits Eh.B.Radovitskaja E.V.Shagalova D.Ja.

9-AMINOCARBOCYANINES FOR SPECTRAL SENSITIZATION OF PHOTOGRAPHIC HALOGEN-SILVER EMULSIONS Russian patent published in 1996 - IPC

Abstract SU 1624988 A1

FIELD: motion picture and photographic industries. SUBSTANCE: invention is concerned with new 9-aminocarbocyanine dyes of general formula: where Y is S, Se; B is H, 4,5- benzo-, 5-methoxy group provided that Y is CH=CH, B is H, 6-methyl or 6-methoxy group; R is methyl, ethyl or (CH)n CHA; A is SO-3

, OSO-3
 n is 2 or 3; R1 is H or CH3; X is NH4; X is not defined if R1- is CH3 or C2H5,. Dyes ore intended for sensitization of photographic halogen-silver emulsions. The invention makes it possible to obtain new dyes having light sensitivity in photographic layers by 1.5-2 times greater with maximum sensitization of 520-540 nm as compared with analogous carbocyanines containing sulfo- or sulfatoalkyl groups at one or both nitrogen atoms of heterocycles. EFFECT: improved properties of the title compounds. 1 tbl

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SU 1 624 988 A1

Authors

Levkoev I.I.

Formina L.V.

Lifshits Eh.B.

Radovitskaja E.V.

Shagalova D.Ja.

Dates

1996-05-20—Published

1980-02-27—Filed

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