DE695982C - Process for sensitization of silver halide substances - Google Patents
Process for sensitization of silver halide substancesInfo
- Publication number
- DE695982C DE695982C DE1933I0050142 DEI0050142D DE695982C DE 695982 C DE695982 C DE 695982C DE 1933I0050142 DE1933I0050142 DE 1933I0050142 DE I0050142 D DEI0050142 D DE I0050142D DE 695982 C DE695982 C DE 695982C
- Authority
- DE
- Germany
- Prior art keywords
- groups
- sensitization
- dye
- alkyl
- carboxyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/08—Sensitivity-increasing substances
- G03C1/10—Organic substances
- G03C1/12—Methine and polymethine dyes
- G03C1/14—Methine and polymethine dyes with an odd number of CH groups
- G03C1/20—Methine and polymethine dyes with an odd number of CH groups with more than three CH groups
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Description
Verfahren zur Sensibilisierung von Halogensilberemulsionen für Infrarot mit Hilfe von Polymethinfarbstoffen Gegenstand der Erfindung ist ein Verfahren zur Sensibilisierüng von Halogensilberemulsionen für Infrarot. Es sind hierfür bereits verschiedene Sensibilisatoren aus der Reihe der Polymethinfarbstoffe benutzt worden. So ist es bereits bekannt, Heptamethinfarbstoffe zu benutzen,. die zu beiden Seiten der Methinkette die verschiedensten Heterocyclen gebunden enthalten. Diese Farbstoffe sensibilisieren jedoch nicht mehr jenseits von etwa gooo A. E. mit aasreichender Intensität. Die bekannten Lepidinhegtamethine dieser Gruppe sensibilisieren zwar bis zu ioooo A. E. und darüber. Die mit solchen Farbstoffen hergestelltenEmulsionen sind jedoch schleierig und von geringer Haltbarkeit. Ferner ist das Sensibilisierungsband nicht sehr intensiv und verwaschen.Process for sensitizing halogen silver emulsions to infrared with the help of polymethine dyes The invention relates to a method for Sensitization of halogen silver emulsions to infrared. There are for this already various sensitizers from the range of polymethine dyes have been used. It is already known to use heptamethine dyes. those on both sides the methine chain contain a wide variety of heterocycles bound. These dyes sensitize however no longer beyond about gooo A. E. with carrion reaching Intensity. The well-known lepidinhegtamethines of this group do sensitize up to ioooo A. E. and above. The emulsions made with such dyes however, they are hazy and have poor durability. Further is the awareness ribbon not very intense and washed out.
Es hat sich üun erfindungsgemäß gezeigt, daß man gute Infrarotsensibilisierungen
bis zu io ooo A. E. und darüber erhalten kann, wobei die Emulsion klar arbeitet
und gut haltbar ist, wenn man Farbstoffe verwendet, die neun Methingruppen zwischen
den Heteroringen enthalten und in der Mitte der Polymethinkette durch die Gruppe
0-R substituiert sind, worin R Acyl einschließlich Sulfacyl oder Alkyl bedeutet.
Die Farbstoffe haben folgende allgemeine Zusammensetzung:
Herstellung des Farbstoffes i, i'-Dimethyl-5, 5'-diphenyl-i2-(benzoyloxy) -2, a'-(streptotetravinylen)-b,enthiocyaninchlorid (i, i'-Dimethyl 5, 5'-diphenyl-s-benzoyloxybenzthiononacarbocyaninchlorid).Preparation of the dye i, i'-dimethyl-5, 5'-diphenyl-i2- (benzoyloxy) -2, a '- (streptotetravinylene) -b, enthiocyanine chloride (i, i'-dimethyl 5, 5'-diphenyl-s-benzoyloxybenzthionone acarbocyanine chloride).
Zunächst wird der Heptamethinfarbstoff der wahrscheinlichen Formel hergestellt, indem i g des aus Furfurakrolein, Tetrahydrochinolin und Salzsäure nach dem Verfahren von König (J. pr. Ch. [2] 88, 216) herstellbaren grünblauen Farbstoffchlorids mit der 15fachen Menge gekühlten .Pyridins bis zur * völligen Lösung geschüttelt wird, worauf man durch langsamen Zusatz von 1 Mol Benzoylchlorid die Hydroxylgruppe verschließt. Der Farbstoff läßt sich in der üblichen Weise durch Eingießen in gesättigte, mit H Cl angesäuerte Kochsalzlösung und Umkristallisieren aus Alkohol oder Aceton isolieren. Er bildet blau schimmernde Nädelchen und färbt tannierte Baumwolle rotstichigblau an.First, the heptamethine dye becomes the likely formula prepared by shaking the green-blue dye chloride, which can be prepared from furfurakrolein, tetrahydroquinoline and hydrochloric acid by the method of König (J. pr. Ch. [2] 88, 216), with 15 times the amount of cooled pyridine until it is completely dissolved, whereupon closes the hydroxyl group by slowly adding 1 mol of benzoyl chloride. The dye can be isolated in the usual way by pouring into saturated sodium chloride solution acidified with HCl and recrystallizing from alcohol or acetone. It forms needles that shimmer blue and stains tannic cotton in a reddish blue.
Das reinblaue Chlorid wird in pyridinischer Lösung mit dem quaternären 5-Phenyl-2-Methylbenzthiazolmethylat zur Reaktion gebracht. Man erhält den Farbstoff von* der wahrscheinlichen Formel in grüngolden schimmernden Kriställchen von ganz ähnlichen Absorptionsverhältnissen wie bei Farbstoff nach Beispiel i. Sensibilisierungsgebiet etwa 750o bis io ooo A. E. Sensibilisierungsmaximum etwa 925o A. E. Beispiel 3 Herstellung des Fgrbstoffes i, F'-Dimethyl-6, 6'- dirnethyl - i 2-acetoxy-2, 2'- (streptotetravinylen)-benzselenocyaninperchlorat #(i, i'-Dimethyl-6, 6'-dimethyl-e-acetoxybenzselenononacarbocyaninperchlorat) von der wahrscheinlichen Formel Der F,grbstoff läßt sich in der üblichen Weise aus dem violetten Heptamethinfarbstoffperchlorat nach Beispiel i und dem von Julius (Dissert., Dresden iga8) beschriebenen i, 2, 6-Trimethylbienzs@elenazoliumbrornid in dunklen Kristallchen gewinnen. Die Nebenbanden der grünlichen Lösung des Farbstoffes in einer Mischung von Pyridin und Methanol liegen im sichtbaren Gebiet bei etwa 476 und 444 mu,. i Sensibilisierungsmaximum etwa 925o A. E. Beispiel q.The pure blue chloride is reacted in a pyridinic solution with the quaternary 5-phenyl-2-methylbenzthiazole methylate. The dye is obtained from * the probable formula in green-golden shimmering crystals with very similar absorption ratios as in the case of the dye according to Example i. Sensitization area about 750o to 10000 AU Sensitization maximum about 925o AU Example 3 Preparation of the substance i, F'-dimethyl-6, 6'-dimethyl-i 2-acetoxy-2, 2'- (streptotetravinylene) -benzselenocyanine perchlorate # (i, i '-Dimethyl-6,6'-dimethyl-e-acetoxybenzselenononacarbocyanine perchlorate) of the probable formula The dye can be obtained in the usual way from the violet heptamethine dye perchlorate according to Example i and the i, 2, 6-trimethylbienzs @ elenazolium bromide described by Julius (Dissert., Dresden iga8) in dark crystals. The secondary bands of the greenish solution of the dye in a mixture of pyridine and methanol are in the visible area at about 476 and 444 μm. i Sensitization maximum around 925o AU example q.
Der Farbstoff i, i'-3, 3, 3', 3'-Hexamethyli2-acetoxy-2, 2'- (streptotetravinylen)
-indo-
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1933I0050142 DE695982C (en) | 1933-07-21 | 1933-07-22 | Process for sensitization of silver halide substances |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2158287X | 1933-07-21 | ||
DE1933I0050142 DE695982C (en) | 1933-07-21 | 1933-07-22 | Process for sensitization of silver halide substances |
Publications (1)
Publication Number | Publication Date |
---|---|
DE695982C true DE695982C (en) | 1940-09-09 |
Family
ID=25981806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1933I0050142 Expired DE695982C (en) | 1933-07-21 | 1933-07-22 | Process for sensitization of silver halide substances |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE695982C (en) |
-
1933
- 1933-07-22 DE DE1933I0050142 patent/DE695982C/en not_active Expired
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