US 7,485,404 B2
Nonsolvate-form crystal of polymethine compound and process for producing the same
Keiki Chichiishi, Yao (Japan); Sayuri Wada, Yao (Japan); and Shigeo Fujita, Yao (Japan)
Assigned to Yamamoto Chemicals, Inc., Yao-shi (Japan)
Appl. No. 10/579,142
PCT Filed Nov. 12, 2004, PCT No. PCT/JP2004/016830
§ 371(c)(1), (2), (4) Date May 15, 2006,
PCT Pub. No. WO2005/049736, PCT Pub. Date Jun. 02, 2005.
Claims priority of application No. 2003-392789 (JP), filed on Nov. 21, 2003.
Prior Publication US 2007/0083048 A1, Apr. 12, 2007
Int. Cl. G03F 7/00 (2006.01); G03F 7/004 (2006.01)
U.S. Cl. 430—270.1  [430/270.15; 430/944] 10 Claims
OG exemplary drawing
 
1. A nonsolvate-form crystal of a polymethine compound represented by the formula (I):

OG Complex Work Unit Drawing
wherein X represents Cl or Br;
wherein in a TG-DTA (thermogravimetry-differential thermal analysis) chart of the compound, the weight loss in TG at 150° C. and below is not greater than 3%;
wherein if X is Cl then the melting point (decomposition temperature) thereof is not lower than 205° C., and the compound is characterized by a powder X-ray diffraction pattern showing characteristic peaks at diffraction angles (2θ±0.2°) of 11.2°, 16.7°, 24.2° and 25.3° in powder X-ray diffraction using the Cu-Kα rays; and
wherein if X is Br then the melting point (decomposition temperature) thereof is not lower than 220° C., and the compound is characterized by a powder X-ray diffraction pattern showing characteristic peaks at diffraction angles (2θ±0.2°) of 17.0°, 20.5°, 21.1° and 24.9° in powder X-ray diffraction using the Cu-Kα rays.