Abstract: A red light emitting element material with high color purity and a light emitting element using the red light emitting element material. A light emitting element material including a compound which is expressed by following general formula (A) and a light emitting element using the compound. In the following general formula (A), at least two of R1, R2, and R3 each independently represents an aryl group or heterocyclic group, and at least one of the R1, R2, and R3 contains a group expressed by following general formula (B). In the general formula (B), R4 represents a heterocyclic group or electron attracting group, R5 represents a hydrogen atom or electron attracting group, R6, R7, and R8 each independently represents a hydrogen atom or substituent, and m represents 0, 1, or 2. However, in a case in which only one group expressed by the general formula (B) is contained in the general formula (A), R4 and R5 are not cyano groups at the same time.

Abstract: A light emitting device material comprising a compound represented by the following formula (I): wherein R1, R2 and R3, which may be the same or different, each represents an aryl group, a heterocyclic group or an aliphatic hydrocarbon group, provided that at least one of R1, R2 and R3 represents an aryl group or a heterocyclic group, containing a group represented by the following formula (II): wherein R4, R5 and R6, which may be the same or different, each represents a hydrogen atom or a substituent; X1 represents an oxygen atom, a sulfur atom, N—RX1 or CRX2RX3; RX1, RX2, RX3, which may be the same or different, each represents a hydrogen atom or a substituent; R4, R5, R6 and X1 may be linked to each other to form a ring; Y represents an oxygen atom, a sulfur atom, or N—RY1; and RY1 represents a hydrogen atom or a substituent.

Abstract: A light-emitting device comprising: a pair of electrodes formed on a substrate; and at least one organic compound layer containing a light-emitting layer provided between the electrodes, wherein the at least one organic compound layer comprises a host material, a layer of the host material has an energy gap of not less than 3.6 eV and an ionization potential of the host material is from 5.4 eV to 6.3 eV.

Abstract: Disclosed are an organic electroluminescence device comprising at least one organic thin film between electrodes, which contains at least one compound represented by formula (1), (2) or (3); a cyclic azine compound having a structure represented by formula (4); a process for producing a cyclic azine dye represented by formula (15), comprising reacting a phenylenediamine derivative represented by formula (13) with a phenol derivative represented by formula (14) in the presence of an oxidizing agent in an alkaline atmosphere; a process for producing a cyclic azine dye represented by formula (18), comprising oxidation reacting an aniline derivative represented by formula (16) or (17) by an oxidizing agent in an alkaline atmosphere; and a process for producing a cyclic azine dye represented by formula (3), comprising reacting a carbonyl compound derivative represented by formula (19) with an aniline compound derivative represented by formula (20) or a salt thereof in the presence of an oxidizing agent in an alkal

Abstract: Disclosed are an organic electroluminescence device comprising at least one organic thin film between electrodes, which contains at least one compound represented by formula (1), (2) or (3); a cyclic azine compound having a structure represented by formula (4); a process for producing a cyclic azine dye represented by formula (15), comprising reacting a phenylenediamine derivative represented by formula (13) with a phenol derivative represented by formula (14) in the presence of an oxidizing agent in an alkaline atmosphere; a process for producing a cyclic azine dye represented by formula (18), comprising oxidation reacting an aniline derivative represented by formula (16) or (17) by an oxidizing agent in an alkaline atmosphere; and a process for producing a cyclic azine dye represented by formula (3), comprising reacting a carbonyl compound derivative represented by formula (19) with an aniline compound derivative represented by formula (20) or a salt thereof in the presence of an oxidizing agent in an alkal

Abstract: A light-emitting material comprises a compound having a partial structure represented by the following formula (1) or tautomer thereof: 1

Abstract: A method for forming a color image comprises the step of developing an image-wise exposed silver halide color photographic photosensitive material at the presence of a 6-aminotetrahydroquinoline color developing agent which is the following compound or its analoge. According to this method, the rapid process can be attained and an image of a low fog density can be obtained.

Abstract: A method for forming a color image comprising developing an image-wise exposed silver halide color photographic photosensitive material in the presence of certain 6-aminotetrahydroquinoline color developing compounds or analogues thereof. A rapid process can be attained and an image of a low fog density can be obtained.

Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide hydrophilic colloid emulsion layer, at least one light-insensitive hydrophilic colloid layer interposed between the support and at least one silver halide emulsion layer, and at least one hydrazine derivative selected from the group consisting of compounds represented by the general formula (1) and (2) contained in the at least one of hydrophilic colloid layers provided in the same side of the support as that coated with the light-sensitive silver halide hydrophilic colloid emulsion layer: ##STR1## wherein their substituents are defined in the specification.

Abstract: An image formation method by silver salt diffusion transfer is described, which comprises subjecting a photosensitive element containing at least one photosensitive silver halide emulsion layer to image exposure, then developing the photosensitive element by use of an alkali processing composition containing a solvent for a silver halide to turn at least a part of unexposed silver halide of the photosensitive silver halide emulsion layer into a transferable silver complex salt, transferring at least a part of the transferable complex salt to a silver precipitating nucleus-containing image receiving layer to form an image on the silver precipitating nucleus-containing image receiving layer, and separating the silver precipitating nucleus-containing image receiving layer from the photosensitive element after image formation to obtain the image, wherein the image is formed in the presence of at least one compound represented by the following formula (I) and at least one compound represented by the following form

Abstract: A method for forming a color image comprises the step of developing an image-wise exposed silver halide color photographic photosensitive material at the presence of the following color developing agent or its analogue. According to this method, the rapid process can be attained, causing only a slight deterioration of the developer with time and capable of sufficiently exhibiting high yellow and cyan densities to achieve an excellent color balance.

Abstract: A method of processing a silver halide photographic material with a developer containing a compound represented by formula (A), wherein the developer further contains at least one compound represented by formula (B) or (C): ##STR1##

Abstract: An ultra-hard silver halide photographic material having high processing stability, which contains a hydrazine derivative represented by the following general formula (1) or (2): ##STR1## wherein X.sup.1 and X.sup.2 are each a group containing 1 to 6 carbon atoms, Y.sup.1 is a hydrogen atom or a group, R.sup.1 is a group, Y.sup.1 and R.sup.1 jointly provide 4 to 30 carbon atoms, Y.sup.2 is an electron withdrawing group, R.sup.2 is a hydrogen atom or a monovalent group, and n is an integer of from 1 to 5.

Abstract: Disclosed is a silver halide photographic material comprising a support having thereon a silver halide emulsion layer containing at least one nucleating agent represented by general formula (N-1) shown below. The silver halide photographic material contains at least one compound represented by general formula (Q-2) shown below in the above described silver halide emulsion layer and/or in a hydrophilic colloid layer adjacent thereto which does not contain a silver halide emulsion: ##STR1## The variable terms in the above formulas are defined in the specification. The silver halide photographic material is suitable for plate making and provides a high contrast image even when using a highly stable developing solution.

Abstract: There is disclosed a silver halide photographic light-sensitive material for plate making giving a hard gradation and having less variation in photographic performance due to fatigue of the developing solution. The silver halide photographic light-sensitive material has at least one silver halide emulsion layer and contains at least one of hydrazine compound represented by Formula (I) in the above emulsion layer or in another hydrophilic colloid layer. The light-sensitive material also contains at least one hydrazine compound represented by Formula (II) in the above emulsion layer or another hydrophilic colloid layers. ##STR1## The variables in these formulas are defined in the specification.

Abstract: Disclosed is a photographic image forming method. A silver halide photographic material is processed with a developing solution having a pH of 9.6 to 11.0. The silver halide photographic material has at least one light-sensitive layer containing a chemically-sensitized silver halide emulsion comprising silver halide grains having a silver chloride content of at least 60 mol %. At least one of said at least one light-sensitive layer and a light-insensitive hydrophilic colloid layer contains a hydrazine compound represented by the formula (1):R.sup.1 --NHNH--G--R.sup.2 (1).The variables in the formula are defined in the specification.

Abstract: A silver halide light-sensitive material containing a compound selected from compounds represented by formula (I) or (II): ##STR1## wherein L.sup.1 represents --O--, --S--, --SO--, --SO.sub.2 --, --N(R.sup.4)--, --CONR.sup.4 --, --NR.sup.4 CO--, --OCONR.sup.4 --, --NR.sup.4 CONR.sup.4 --, --SO.sub.2 NR.sup.4 --, --NR.sup.4 SO.sub.2 -- or --NR.sup.4 SO.sub.2 NR.sup.4 --, each of which is bonded to the pyridine ring at the right hand side thereof; L.sup.2, L.sup.3, and L.sup.4 each represent a divalent aliphatic group or a divalent aromatic group; G represents --CO--, --SO.sub.2 --, --SO--, --COCO--, a thiocarbonyl group, an iminomethylene group or --P(O)(G.sup.1 R.sup.4)--; G.sup.1 represents a single bond, --O-- or --NR.sup.4 --; R.sup.1 represents an aliphatic group or an aromatic group; R.sup.2 represents a monovalent substituent; n.sup.1 represents 0 or an integer of from 1 to 4; R.sup.

Abstract: A silver halide light-sensitive material containing a hydrazine compound represented by formula (I): ##STR1## wherein L.sup.1 represents a single bond, --O--, --S--, --NR.sup.6 --, --CO--, SO.sub.2 --, --P(O) (G.sup.2 R.sup.6)-- or a combination thereof; L.sup.2 represents --SO.sub.2 NR.sup.6 --, --NR.sup.6 SO.sub.2 NR.sup.6 --, --CONR.sup.6 --, --NR.sup.6 CONR.sup.6 -- or --G.sup.2 P(O) (G.sup.2 R.sup.6)NR.sup.6 --; G.sup.1 represents --CO--, --SO.sub.2 --, --SO--, --COCO--, a thiocarbonyl group, an iminomethylene group or --P(O) (G.sup.2 R.sup.6)--; G.sup.2 represents a single bond, --O-- or --NR.sup.6 --; R.sup.1 represents an aliphatic group or an aromatic group; R.sup.2, R.sup.3, and R.sup.4 each represent a divalent aliphatic group or a divalent aromatic group; R.sup.5 represents a hydrogen atom, an aliphatic group, an aromatic group, an alkoxy group, an aryloxy group or an amino group; R.sup.6 represents a hydrogen atom, an aliphatic group or an aromatic group; m represents 0 or 1; and X.sup.

Abstract: A silver halide photographic material which comprises a compound represented by the following general formulae (Ia) or (Ib):R.sup.1 --L.sup.1 --R.sup.2 --L.sup.2 --R.sup.3 --NHNH--G.sup.1 --R.sup.4 (Ia)R.sup.6 --L.sup.3 --R.sup.2 --NHNH--G.sup.1 --R.sup.4 (Ib)wherein the terms are as defined in the specification. The photographic material is capable of producing ultrahigh contrast images and is useful in photomechanical processes. An advantage of the material in comparison to prior materials is that can be developed using a developer having a lower pH value.

Abstract: Disclosed is a silver halide photographic material containing a compound of a general formula (1) or (2):ED-(Time).sub.t -Y-L-Z (1)wherein ED represents a group that releases the moiety (Time).sub.t -Y-L-Z by reaction with an oxidation product of a developing agent; Time represents a divalent linking group; t represents 0 or 1; Y represents a divalent group comprising a hetero atom through which Y bonds to the moiety ED-(Time).sub.t ; L represents a divalent group which is capable of being cleaved by reaction with components in a developer; and Z represents a monovalent functional group that expresses a development inhibiting effect; ##STR1## wherein Time, t, L and Z have the same meanings as above; Y represents a divalent group comprising a hetero atom through which Y bonds to the moiety ##STR2## R.sub.1 represents an aliphatic group or an aromatic group; G.sub.1 represents is ##STR3## G.sub.2 represents a mere bond, --O--, --S-- or ##STR4## R.sub.2 has the same meaning as R.sub.