Abstract: Provided is a light-emitting element including a phosphorescent iridium metal complex that emits phosphorescence in a yellow green to orange wavelength range, and has high emission efficiency and reliability. Thus, further provided is the phosphorescent iridium metal complex that emits phosphorescence in the yellow green to orange wavelength range. Further provided are a light-emitting device, an electronic appliance, and a lighting device each of which includes the above light-emitting element. The light-emitting element includes an EL layer between a pair of electrodes, and the EL layer contains a phosphorescent iridium metal complex where nitrogen at the 3-position of a pyrimidine ring having an aryl group bonded to the 4-position is coordinated to a metal, a substituent having a carbazole skeleton is bonded to the 6-position of the pyrimidine ring, and the aryl group bonded to the 4-position of the pyrimidine ring is ortho-metalated by being bonded to the metal.

Abstract: The invention provides compounds of the Formula (I), in which W is independently selected from W1, W2, W3, W4, W5, or W represents a pair of substituents independently selected from H, alkyl, aryl or amide in which the amide is optionally part of a linking chain, and the Zn—Zn bonds (n=4-17; n?=n+1) are optionally of any whole or partial bond order, Y is Y1 or Y represents a pair of substituents independently selected from H, C-1-C6 alkyl, Z5 or Z6 aryl, or Y is optionally a bridging structure that may comprise one or more C-1-C6 amide, C-1-C6 ether, or C-1-C6 ester groups, R-R39 are independently selected from no substituent, a lone pair of electrons, H, halogen, C5-C6 aryl, C1- C-12 alkyl, amine, C-1-C6 alkylamine, C-1-C6 amide, nitro, cyano, carboxyl, C-1-C6 ester, phosphane, thiol, C-1-C6 thioether, OR?, and suitable pairs of adjacent R groups (R-R39) may optionally together form part of a C5 or C6 aryl ring, a Z5 or Z6 ring, R? is independently selected from H, C-1-C6 alkyl, Z5 or Z6 aryl, C-1-C6 ester,

Abstract: Disclosed herein are phosphorescent materials comprising a complex of a metal atom M selected from Ir, Pt, Rh, Pd, Ru and Os and at least one ligand L, wherein the ligand L is represented by formula (1). Also disclosed are organic electroluminescent devices including such phosphorescent materials.

Abstract: The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, com-prising these metal complexes. M(L)n(L?)m (formula 1), where the compound of the general formula (1) contains a moiety M(L)n of the formula (2).

Abstract: According to the present invention, a wider variation of organometallic complexes that can emit phosphorescence can be provided by applying, as a ligand, an organic compound from which a variety of derivatives can be easily synthesized. In particular, an organometallic complex having a sharp emission spectrum is provided. Further, an organometallic complex having high emission efficiency is provided. An organometallic complex represented by the general formula (G1) is provided. In the formula, Ar represents an aryl group, R represents an alkoxy group having 1 to 4 carbon atoms, and R1 and R2 individually represent either hydrogen or an alkyl group having 1 to 4 carbon atoms.

Abstract: The present invention provides ruthenium complexes of the formula wherein: X and X? denote an anionic ligand selected independently from the group consisting of anions of halogens, the phenolate anion (C6H5O?) the perfluorophenolate anion (C6F5O?), and residues of arylcarboxylic, alkylcarboxylic, perfluoroalkylcarboxylic, alkylsulphonic, arylsulphonic, or perfluoroalkylsulphonic acids; A denotes either nitrogen or carbon with an R5 group; R1 denotes hydrogen, C1-C5 alkyl, C2-C5 alkene or C3-C7 cycloalkyl; and R2, R3, R4, R5, R6, R7 denote independently hydrogen, C1-C25 alkyl, C1-C25 perfluoroalkyl, C5-C24 aryl, C2-C25 alkene, C3-C7 cycloalkyl, nitro (—NO2), cyano (—CN), formyl (—CHO), carboxyl (—COOH), or an ester (—COOR?), sulphone (—SO2R?), sulphonamide (—SO2NR?2), or ketone (—COR?) group, in which R? is a C1-C5 alkyl, C1-C5 perfluoroalkyl, or C5-C24 aryl group.

Abstract: An object is to provide a novel organometallic complex capable of emitting phosphorescence, an organometallic complex which exhibits deep red emission, and a light-emitting element which provides deep red emission. Provided is an organometallic complex having a structure represented by the following General Formula (G1). In the formula, R1, R2, R3, R4, R5, R6, R7, R8, and R9 represent substituents, and M is a central metal and represents either a Group 9 element or a Group 10 element.

Abstract: This invention provides a transition metal carbene complexes and the electroluminescent application thereof. Through employing different N?N heteroleptic ligand, the transition metal carbene complex can display wide-range color tuning ability from deep blue to red. The mentioned transition metal carbene complex can be applied in luminescent device, and the luminescent device can display wide-range color tuning ability with high luminescent efficiency while employing different N?N heteroleptic ligand in the transition metal carbene complex.

Abstract: Embodiments of the present disclosure, in one aspect, relate to a nanoparticle, methods of imaging a tumor, method of imaging a disease, method of treating a condition, disease, or related biological event, or the like.

Abstract: The present invention relates to metal-carbene complexes comprising a central atom selected from iridium and platinum, and diazabenzimidazolocarbene ligands, to organic light diodes which comprise such complexes, to light-emitting layers comprising at least one such metal-carbene complex, to a device selected from the group comprising illuminating elements, stationary visual display units and mobile visual display units comprising such an OLED and to the use of such a metal-carbene complex in OLEDs, for example as emitter, matrix material, charge transport material and/or charge or exciton blocker.

Abstract: The present invention provides metal-porphyrin carbon nanostructures, which have excellent oxygen reduction performance and are useful as materials for fuel cell electrodes.

Abstract: The present disclosure relates to compounds effective as human protein tyrosine phosphatase beta (HPTP-?) inhibitors thereby regulating angiogenesis. The present disclosure further relates to compositions comprising said human protein tyrosine phosphatase beta (HPTP-?) inhibitors, and to methods for regulating angiogenesis.

Abstract: The disclosure provides zeolitic frameworks for gas separation, gas storage, catalysis and sensors. More particularly the disclosure provides zeolitic frameworks (ZIFs). The ZIF of the disclosure comprises any number of transition metals or a homogenous transition metal composition.

Abstract: The invention relates to bimetallic complexes in which the ligand contains a salophen unit which complexes copper, manganese or cobalt and a phenanthroline unit which complexes palladium and the two systems are linked by a continuous conjugated system. The invention further relates to the use of these bimetallic complexes as catalysts for the oxidative carbonylation of aromatic hydroxy compounds to form diaryl carbonates, a process for preparing diaryl carbonates using the bimetallic complex as catalyst and also diaryl carbonates prepared by oxidative carbonylation of aromatic hydroxy compounds using the bimetallic complexes of the invention as catalysts.

Abstract: An organometallic complex according to the present invention comprises a structure represented by the following general formula (1). In the formula, R1 to R5 are any one selected from the group consisting of hydrogen, a halogen element, an acyl group, an alkyl group, an alkoxy group, an aryl group, a cyano group, and a heterocyclic group, Ar is an aryl group having an electron-withdrawing group or a heterocyclic group having electron-drawing group, and M is an element of Group 9 or an element of Group 10.

Abstract: The present invention relates to new rhenium compounds of formula (I) with medical utility, corresponding pharmaceutical compositions as well as medical uses thereof.

Abstract: Provided is luminescent gold nanomaterial functionalized by N-(4-aminobutyl)-N-ethylisoluminol, methods of preparation and application thereof. The functionalized gold nanoparticle nanomaterial are formed by N-(4-aminobutyl)-N-ethylisoluminol bonding to the surface of the gold nanomaterial. The functionalized gold nanomaterial are prepared by directly reducing chloroauric acid with N-(4-aminobutyl)-N-ethylisoluminol, wherein N-(4-aminobutyl)-N-ethylisoluminol acts as reducer and stabilizer simultaneously. The preparation method is simple, fast and no need of special conditions. The preparation methods can be performed in a wide temperature range, for example, 15-35° C. The size and pattern of the functionalized gold nanomaterial can be specified by choosing the ratio of chloroauric acid to N-(4-aminobutyl)-N-ethylisoluminol. The obtained functionalized nano gold particles exhibit excellent chemiluminescence properties.

Abstract: A light-emitting material comprises iridium and at least one ligand represented by the following formula: wherein R11 and R12 each represents an alkyl group, an aryl group, a heteroaryl group, an alkoxy group, a cyano group or a cyclic structure obtained by connection of one of a plurality of R11s to another of said plurality of R11s, or one of a plurality of R12s to another of said plurality of R12s, or one of the R11s to one of the R12s; m1 represents an integer from 0 to 4; m2 represents an integer from 0 to 6.

Abstract: Disclosed are a blue phosphorescent compound with a high color purity and a high efficiency, and an organic electroluminescent device using the same. The blue phosphorescent compound is represented by the following Formula: wherein R1 to R5 are each independently hydrogen (H), fluorine (F), chlorine (Cl), bromine (Br), a cyano group, a C1 to C6 alkyl group, a C1 to C6 alkoxy group, a C6 to C20 substituted or unsubstituted aromatic group, a C5 to C20 substituted or unsubstituted heterocyclic group, a C1 to C6 amine group, a C6 to C20 aromatic-substituted amine group, or a C5 to C20 heterocycle-substituted amine group, X is selected from nitrogen (N), oxygen (O), phosphorous (P) and sulfur (S) atoms, at least one of A1, A2, A3 and A4 is nitrogen (N), and the remaining are selected from hydrogen (H)-substituted carbon, and alkyl or alkoxy-substituted carbon, L is a monodentate or bidentate ligand and n is 1 to 3.

Abstract: Trans-platinum compounds comprising carboxylato groups are disclosed, with anti-cancer usefulness. The carboxylato groups participate in solubilizing trans-platinum compounds to which they are attached.

Abstract: The present invention provides a catalyst complex or ligand, and compositions thereof, for use in a variety of organic reactions having high reactivity and enantioselectivity. The catalyst is a N-heterocyclic carbene having three fused rings with first and second rings being six-membered rings and the third being a five-membered ring. The first ring is fused to the second and has four substituents. The second ring has two nitrogens flanking a carbene atom with one nitrogen bound to a substituent. The carbene atom may optionally be bonded to a metal. The third ring is fused to the second ring and contains two nitrogens. The third ring of the catalyst has a double bond and two substituents on adjacent non-fused carbons. A non-fused nitrogen of the third ring is partially bonded to another substituent. Methods for the synthesis and use of the catalyst embodiments of the present invention are also provided.

Abstract: Compositions and methods for modifying one or more biologic targets are provided. Suitable targets include cells, DNA, proteins, enzymes, and/or a subject in need thereof. The compositions may exist as a monomer or multimer and are active in a biologic environment with enhanced activity in hypoxic environments and, thus, exhibit improved specificity for hypoxic biologic targets (e.g., tumorigenic cells and those undergoing uncontrolled cell growth). A composition typically comprises a complex with an overall charge of 2+ or greater having at least one ruthenium atom attached to a redox active ligand. The redox active ligand helps maintain separation of more than one ruthenium atom. Suitable compositions may further include a terminal ligand comprising a heterocyclic aromatic compound. When provided to a biologic target, the composition modifies the biologic target and no additional compounds need be provided. Suitable compositions are typically catalytic and regenerative in the presence of a reducing agent.

Abstract: The disclosure relates to methods and materials useful for depolymerizing a polymer. In one embodiment, for example, the disclosure provides a method for depolymerizing a polymer containing electrophilic linkages, wherein the method comprises contacting the polymer with a nucleophilic reagent in the presence of a guanidine-containing compound. The methods and materials of the disclosure find utility, for example, in the field of waste reclamation and recycling.

Abstract: A novel organometallic complex which can emit phosphorescence is provided. A light-emitting element, a light-emitting device, an electronic device, or a lighting device with high emission efficiency is provided. The organometallic complex having an aryl triazine derivative as a ligand is represented by General Formula (G1) below as a representative of the organometallic complex of the present invention.

Abstract: The design and synthesis of six nickel charge transfer (CT) complexes are described herein. The six nickel CT complexes have a nickel center, two organic ligands coordinated with the nickel center to form a dianionic square planar supramolecule and an organic counter-cation. The ligands and counter-cations are selected to optimize properties, such as molecular alignment, film morphology, and molecular packaging. Described herein, the ligands can be 2,3-pyrazinedithiol (L1), 1,2-benzenedithol (L2) or 2,3-quinoxalinedithol (L3) and the counter-cations can be diquat (2,2?-ebpy) or methyl viologen (4,4?-mbpy). The six nickel CT complexes can also be utilized semiconductor devices, such as thin film transistors or inverters. Processes are also provided for the fabrication of semiconductors devices. The processes can include fabricating a substrate with a bilayer octadecylphosphonic acid (ODPA)/Al2O3 dielectric and applying one of the six nickel charge transfer (CT) complexes to the substrate.

Abstract: A new light-emitting device utilizing phosphorescence is provided. Further, an electronic device and a lighting device which utilize phosphorescence are provided. One embodiment of the present invention is a light-emitting device including a phosphorescent organometallic iridium complex comprising iridium and either pyrimidine having an aryl group at the 4-position or 1,3,5-triazine having an aryl group at the 2-position. One of nitrogen in the pyrimidine or 1,3,5-triazine is coordinated to the iridium. Also, each of the pyrimidine and 1,3,5-triazine has a substituent such as an alkyl group or an aryl group. Further the ortho position of the aryl group which is bonded to the 4-position of the pyrimidine or the 2-position of the 1,3,5-triazine is bonded to the iridium.

Abstract: To provide nitrogen-containing aromatic compounds with excellent oxygen reduction activity, metal complexes containing them, and catalysts and electrodes employing the same, the present invention provides an aromatic compound satisfying the following conditions (a) and (b): (a) It has 2 or more structures surrounded by at least 4 coordinatable nitrogen atoms (which structures may be the same or different), (b) At least one of the nitrogen atoms composing the structure is a nitrogen atom in a 6-membered nitrogen-containing heterocyclic ring.

Abstract: Disclosed is a phosphorescent organometallic complex having: a 6-membered aromatic heterocycle having a nitrogen atom; iridium or platinum to which the nitrogen atom coordinates; and an aryl group which is bonded to an ?-carbon of the nitrogen atom and is ortho-metalated with the iridium or platinum, where at least one of the aromatic heterocycle and the aryl group has an alicyclic hydrocarbon having an intramolecular carbon-carbon bridged bond as a substituent. The ability of the bulky structure of the alicyclic hydrocarbon to inhibit aggregation of the organometallic complex, concerted with the strong electron-donating property of the alicyclic hydrocarbon to the aromatic heterocycle or the aryl group, contributes to the increase in absorption coefficient and phosphorescent efficiency of the organometallic complex. The improved absorption coefficient and the phosphorescent efficiency allow the formation of a light-emitting element with excellent external quantum efficiency over 25%.

Abstract: The present invention discloses a phosphorescent tris-chelated transition metal complex comprising i) two identical carbon-nitrogen (C^N) or nitrogen-nitrogen (N^N) chromophoric ligands being incorporated into a coordination sphere thereof with a transition metal, and one carbon-phosphorus (C^P) chelate being incorporated into the coordination sphere; or ii) one carbon-nitrogen (C^N) or nitrogen-nitrogen (N^N) chromophoric ligand forming a coordination sphere thereof with a transition metal, and two identical carbon-phosphorus (C^P) chelates being incorporated into the coordination sphere, wherein the metal is iridium, platinum, osmium or ruthenium, and the chromophoric ligands possess a relatively lower energy gap in comparison with that of the non-chromophoric chelate, the latter afforded an effective barrier for inhibiting the ligand-to-ligand charge transfer process, so that bright phosphorescence can be observed.

Abstract: The invention is a nano-entity conjugate for use in an in vivo immunomagnetic hyperthermia system for the detection and treatment of any cell or virus having a target surface receptor which encompasses a technology platform that can be used for both real-time monitoring of any cell or virus having a target surface receptor and as a delivery platform for certain types of treatment that are conducive for in vivo applications. The system allows of cell or virus enumeration; cell or virus capture; and cell or virus removal from the patient's circulatory system in-vivo using immunomagnetic hyperthermia. The application of immunomagnetic hyperthermia may actually diminish and eventually stop the progression of cancer and other blood borne or blood affected diseases.

Abstract: The present invention provides a novel iridium complex and an organic light-emitting element including the same. The novel iridium complex includes phenylpyrazole as a ligand and has a basic skeleton in which a pyrimidine ring is bonded to a phenyl ring.

Abstract: The anti-cancer agent of the present invention contains at least one kind of phosphine transition metal complex selected from a group of compounds represented by the following Formulae (1a) to (1d). According to this anti-cancer agent, an anti-cancer agent is provided which has a higher anti-cancer activity and lower toxicity compared to anti-cancer agents in the related art. In Formulae (1a), (1b), (1c), and (1d), R1 and R2 represent a linear or branched alkyl group, and R4 has a higher priority than R2 as ranked according to RS notation. R3 and R4 represent a hydrogen atom or a linear or branched alkyl group. M represents an atom of a transition metal selected from a group consisting of gold, copper, and silver. X? represents an anion.

Abstract: An organometallic complex according to the present invention comprises a structure represented by the following general formula (1). In the formula, R1 to R5 are any one selected from the group consisting of hydrogen, a halogen element, an acyl group, an alkyl group, an alkoxy group, an aryl group, a cyano group, and a heterocyclic group, Ar is an aryl group having an electron-withdrawing group or a heterocyclic group having electron-drawing group, and M is an element of Group 9 or an element of Group 10.

Abstract: Organometallic compounds comprising an imidazole carbene ligand having a N-containing ring fused to the imidazole ring are provided. In particular, the N-containing ring fused to the imidazole ring may contain one nitrogen atom or more than one nitrogen atom. These compounds may demonstrate high photoluminescent (PL) efficiency, Gaussian emission spectra, and/or short excited state lifetimes. These materials may be especially useful as blue phosphorescent emitters.

Abstract: Compounds are provided that comprise a heterocyclic carbene ligand. In particular, an oxazole or a thioazole carbene are used in place of the traditional imidazole carbene. These compounds may be used in OLEDs to provide devices having improved properties, such as stability and color-tuning. Additionally, a novel methodology to synthesize heterocyclic carbene metal complexes is provided.

Abstract: An organometallic complex having a structure represented by the general formula (G1) is synthesized and applied to a light-emitting element. In the formula, R1 represents either an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxycarbonyl group having 1 to 5 carbon atoms; R2 and R3 each show either hydrogen or an alkyl group 1 to 4 carbon atoms; Ar represents an arylene group having 6 to 25 carbon atoms; M is a center metal selected from Group 9 element and Group 10 element.

Abstract: Provided is an iridium complex having a substructure represented by the following formula (1), which is a luminescent element material capable of luminescence with high brightness/high efficiency and excellent in durability and can be used in a luminescent element, etc.

Abstract: The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, comprising these metal complexes.

Abstract: It is an object of the present invention to provide a substance capable of emitting phosphorescence. In addition, it is an object of the present invention to provide a light-emitting element that is excellent in chromaticity. One aspect of the present invention is an organometallic complex having a structure represented by a general formula (1). In the general formula (1), R1 to R4 are each any one of hydrogen, a halogen element, an acyl group, an alkyl group, an alkoxyl group, an aryl group, a cyano group, and a heterocyclic group. In addition, R5 to R13 are each any one of hydrogen, an acyl group, an alkyl group, an alkoxyl group, an aryl group, a heterocyclic group, and an electron-withdrawing group. An organometallic complex having such a structure can emit phosphorescence with higher emission intensity.

Abstract: The invention relates to copper(I) complexes of the formula (A) with X?Cl, Br or I (independently of one another) N*?E=bidentate ligand, with E=phosphinyl/arsenyl radical of the form R2E (where R=alkyl, aryl, alkoxy, phenoxy, amide); N*=imine function. Which is part of an aromatic group selected from pyridyl, pyrimidyl, pyridazinyl, triazinyl, oxazolyl, thiazolyl and imidazolyl, the aromatic group optionally having at least one substituent for increasing the solubility of the copper(I) complex in an organic solvent, and “?”=at least one carbon atom, which is likewise part of the aromatic group, the carbon atom being located both directly adjacent to the imine nitrogen atom and to the phosphorus or arsenic atom, and also to the use thereof in optoelectronic assemblies, especially in OLEDs.

Abstract: The present invention relates to compound of formula I: and their use as chemiluminescent and/or bioluminescent reagents.

Abstract: Provided is a novel organometallic complex which can be synthesized easily and emits phosphorescence, or a compound which emits red phosphorescence. The inventors focused on easy synthesis of an m-aminophenyl pyrazine derivative represented by the following general formula (G0), synthesized an organometallic complex having a structure in which the derivative is coordinated to a Group 9 or Group 10 metal ion, and further synthesized a useful substance which emits red phosphorescence.

Abstract: A material for an organic electroluminescence device including a phosphorescent metal complex containing a monoanionic bidentate ligand represented by the following formula (A1-1) or formula (A3-1) as defined in the specification and a non-radiative metal having an atomic weight of 40 or more, an organic electroluminescence device including the material for an organic electroluminescence device, and a light emitting unit, a display unit and an illumination unit each including the organic electroluminescence device are provided.

Abstract: Process for preparing pigments of the formula (I) or tautomeric structures thereof and their hydrates, containing melamine or melamine derivatives as guest(s), characterized in that the azobarbituric mono-salt of the formula (II) is reacted with a nickel compound and melamine or a melamine derivative in the presence of the free azobarbituric acid of the formula (III), the cation C1? is any desired univalent cation or the fraction of any desired multivalent cation that corresponds to a positive charge of one, except for H+.

Abstract: An organometallic complex is provided by which favorable red-color light emission can be obtained. Further, an organometallic complex having a peak of light emission at about 620 nm is provided because the wavelength of light which is perceived as excellent red-color light is about 620 nm. Furthermore, an organometallic complex is provided by which red-color light emission with high luminous efficiency (cd/A) can be obtained. An organometallic complex represented by the following general formula (G2) and a light-emitting element, a light-emitting device, and an electronic device including the organometallic complex represented by the following general formula (G2) are provided.

Abstract: An isolated salt comprising a compound of formula (H2X)(TiO(Y)2) or a hydrate thereof, wherein X is 1,4-diazabicyclo[2.2.2]octane (DABCO), and Y is oxalate anion (C2O4?2), when heated in an oxygen-containing atmosphere at a temperature in the range of at least about 275° C. to less than about 400° C., decomposes to form an amorphous titania/carbon composite material comprising about 40 to about 50 percent by weight titania and about 50 to about 60 percent by weight of a carbonaceous material coating the titania. Heating the composite material at a temperature of about 400 to 500° C. crystallizes the titania component to anatase. The titania materials of the invention are useful as components of the anode of a lithium or lithium ion electrochemical cell.

Abstract: Methotrexate-modified nanoparticles that target tumors, compositions that include the nanoparticles, methods of imaging tissues using the nanoparticles, and methods for treating tissues using the nanoparticles.

Abstract: An object is to provide a novel organometallic complex capable of phosphorescence and having high heat resistance. Alternatively, an object is to provide a light-emitting device with high added value. The objects are achieved by providing an organometallic complex which has a structure represented by a general formula (G1) or (G2) below and is formed in such a way that a corresponding one of pyrazine derivatives represented by general formulae (G0) and (G0?) below is ortho-metalated by a Group 9 or Group 10 metal ion, or by providing a light-emitting element and a light-emitting device including the organometallic complex.

Abstract: Provided is a novel substance that can emit phosphorescence. Alternatively, provided is a novel substance with high emission efficiency. An organometallic complex in which a 4-arylpyrimidine derivative is a ligand and iridium is a central metal is provided. Specifically, an organometallic complex having a structure represented by a general formula (G1) is provided. In the general formula (G1), R1 represents a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms, R2 represents any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted phenyl group, R3 represents hydrogen or a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, and Ar1 represents a substituted or unsubstituted arylene group having 6 to 10 carbon atoms.

Abstract: An object is to provide an organometallic complex whose phosphorescence characteristics can be adjusted by varying the structure of a ligand. Alternatively, an object is to provide an organometallic complex capable of emitting yellow phosphorescence with high luminance. Alternatively, an object is to provide a light-emitting device with high added value. An organometallic complex which has a structure represented by a general formula (G1) below and at least one substituent group represented by a general formula (G2) below as a phenyl group and is formed in such a way that a phenylpyrazine derivative represented by a general formula (G0) below is ortho-metalated by an ion of a Group 9 metal or of a Group 10 metal is provided. Alternatively, a light-emitting element and a light-emitting device formed including the organometallic complex are provided.