US4994566A
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Phthalocyanine crystal, process for manufacture thereof and its use for electrophotographic photosensitive material
Assignee: NEC Corp
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Filing: 1989-04-17
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Granted: 1991-02-19
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Expires: 2009-04-17
Abstract
Abstract A new crystal form of a titanyl phthalocyanine compound is provided. This crystal form shows characteristic strong absorption peaks at 1,332±2 cm -1 , 1,074±2 cm -1 , 962±2 cm -1 and 783±2 cm -1 in an infrared absorption spectrum and/or characteristic strong peaks at 27.2°, 9.7° and 24.1° of Bragg's angle 2θ in an X-ray diffraction spectrum and has very good dispersibility and stability in a solvent and also very good photoelectric conversion efficiency and so is very useful particularly as a charge generation agent highly sensitive in a semiconductor laser wavelength region as required in a photosensitive material for a highspeed high-definition printer. Such crystal form can be obtained by treating non-crystalline titanyl phthalocyanine with tetrahydrofuran.
Inventors
- 👤 Yoshikazu Mimura
- 👤 Keiichi Takano, deceased
- 👤 Tomohisa Gotou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:35
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0696; C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0014; C09B67/0016; C09B67/0025; C09B67/0026; C30; C30B; C30B29/00; C30B29/54; C30B7/00; C30B7/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A phthalocyanine crystal which is represented by the general formula: ##STR3## wherein X 1 , X 2 , X 3 and X 4 each independently represent various halogen atoms and n, m, l and k represent numerals of 0 to 4 and shows, in an infrared absorption spectrum, characteristic strong absorption peaks at 1,332±2 cm -1 , 1,074±2 cm -1 , 962±2 cm -1 and 783±2 cm -1 .
Claim 2
Dependent Claim
69 words
A phthalocyanine crystal which is represented by the general formula: ##STR3## wherein X 1 , X 2 , X 3 and X 4 each independently represent various halogen atoms and n, m, l and k represent numerals of 0 to 4 and shows, in an infrared absorption spectrum, characteristic strong absorption peaks at 1,332±2 cm -1 , 1,074±2 cm -1 , 962±2 cm -1 and 783±2 cm -1 .
Claim 3
Dependent Claim
32 words
The phthalocyanine crystal according to claim 1 which shows, in an X-ray diffraction spectrum, the maximum diffraction peak at 27.2° of Bragg's angle (2θ±0.2°) and strong diffraction peaks at 9.7° and 24.1°.
Claim 4
Dependent Claim
48 words
A process for the manufacture of a phthalocyanine crystal which shows, in an infrared absorption spectrum, characteristic strong peaks at 1,332±2 cm -1 , 1,074±2 cm -1 , 962±2 cm -1 and 783±2 cm -1 , characterized in that a non-crystalline titanyl phthalocyanine compound is treated with tetrahydrofuran.
Claim 5
Dependent Claim
48 words
A process for the manufacture of a phthalocyanine crystal which shows, in an infrared absorption spectrum, characteristic strong peaks at 1,332±2 cm -1 , 1,074±2 cm -1 , 962±2 cm -1 and 783±2 cm -1 , characterized in that a non-crystalline titanyl phthalocyanine compound is treated with tetrahydrofuran.
Claim 6
Dependent Claim
66 words
A phthalocyanine crystal which is represented by the general formula: ##STR4## wherein X 1 , X 2 , X 3 and X 4 each independently represent various halogen atoms and n, m, l and k represent numerals of 0 to 4 and shows, in an X-ray diffraction using Cu-Kα ray, the maximum peak at 27.2° of Bragg's angle (2θ±0.2°) and strong peaks at 9.7° and 24.1°.
Claim 7
Dependent Claim
66 words
A phthalocyanine crystal which is represented by the general formula: ##STR4## wherein X 1 , X 2 , X 3 and X 4 each independently represent various halogen atoms and n, m, l and k represent numerals of 0 to 4 and shows, in an X-ray diffraction using Cu-Kα ray, the maximum peak at 27.2° of Bragg's angle (2θ±0.2°) and strong peaks at 9.7° and 24.1°.
Claim 8
Dependent Claim
46 words
A process for the manufacture of a phthalocyanine crystal which shows, in an X-ray diffraction spectrum, the maximum diffraction peak at 27.2° of Bragg's angle (2θ±0.2°) and strong diffraction peaks at 9.7° and 24.1°, characterized in that a non-crystalline titanyl phthalocyanine compound is treated with tetrahydrofuran.
Claim 9
Dependent Claim
46 words
A process for the manufacture of a phthalocyanine crystal which shows, in an X-ray diffraction spectrum, the maximum diffraction peak at 27.2° of Bragg's angle (2θ±0.2°) and strong diffraction peaks at 9.7° and 24.1°, characterized in that a non-crystalline titanyl phthalocyanine compound is treated with tetrahydrofuran.
References Cited (Backward Citations)
US4664997A
Cited
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