Title:
ASYMMETRIC CYANINE DYE
Document Type and Number:
WIPO Patent Application WO/2003/029356
Kind Code:
A1
Abstract:
A compound represented by the general formula (I) (R1, R2, R4, and R5 each represents alkyl or aryl, or R1 and R2 and&sol or R4 and R5 may be bonded to each other to form a ring&semi R3 represents hydrogen or sulfo&semi R6, R7, R8, and R9 each represents hydrogen, halogeno, alkyl, alkoxy, amino, nitro, or cyano&semi X1 and X2 each represents alkyl or aryl&semi m1 to m3 each is 0 or 1&semi L1 to L7 each represents methine, provided that when two or more of the methines each has a substituent, then the substituents may be bonded to each other to form a ring&semi M represents hydrogen, a metal, or a quaternary ammonium salt&semi and n is an integer of 1 to 7 necessary for charge neutralization) or a salt of the compound. They are usable as a novel cyanine dye useful as an infrared−sensitive dye which exerts no adverse influence on the photographic properties of a photographic emulsion and is reduced in residual color after development.
Inventors:
KAWAKAMI MASAYUKI (JP)
Application Number:
PCT/JP2002/010033
Publication Date:
April 10, 2003
Filing Date:
September 27, 2002
Export Citation:
Assignee:
FUJI PHOTO FILM CO LTD (JP)
KAWAKAMI MASAYUKI (JP)
KAWAKAMI MASAYUKI (JP)
International Classes:
C09B23/01; C09B23/08; G03C1/12; G03C1/14; G03C1/20; (IPC1-7): C09B23/00
Domestic Patent References:
| WO1999064519A1 | 1999-12-16 | |||
| WO2001057237A2 | 2001-08-09 | |||
| WO2002012398A1 | 2002-02-14 |
Foreign References:
| US6159657A | 2000-12-12 | |||
| DE19957007A1 | 2001-05-31 | |||
| JPH0783925A | 1995-03-31 |
Other References:
See also references of EP 1437386A4
Attorney, Agent or Firm:
SIKS & CO. (Kyobashi-Nisshoku Bldg. 8-7, Kyobashi 1-chom, Chuo-ku Tokyo, JP)
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