93 results about "Tetradentate ligand" patented technology

A platinum complex represented by the general formula (1) below, useful as a phosphorescence emission material, a tetradentate ligand useful for synthesizing the platinum complex, and a light-emitting device containing at least one of the platinum complex.

wherein ring B represents a nitrogen-containing aromatic heterocyclic ring; rings A, C and D each independently represent an aromatic or aromatic heterocyclic ring, while either of the rings C and D represents five-membered ring, the other represents a five- or six-membered ring; R^A, R^B, R^C, and R^D respectively represent substituents on the rings A, B, C, and D; two of X^A, X^B, X^C, and X^D represent a nitrogen atom that may be bound with the platinum atom by a coordinate bond, the others each independently represent a carbon atom or nitrogen atom that may be bound with the platinum atom by a covalent bond; Q represents a bivalent atom or atomic group bridging the rings B and C; and Y^C and Y^D each independently represent a carbon atom or nitrogen atom.

A platinum complex represented by the general formula 1, useful as a phosphorescence emission material, a tetradentate ligand useful for synthesizing the platinum complex, and a light-emitting device containing at least one of the platinum complex.

In the general formula 1, two of the rings A, B, C, and D each independently represent an aromatic ring or an aromatic heterocyclic ring, while the other two rings each represent a nitrogen-containing heterocyclic ring; R^A-D represent the substituents; each the rings A and B, the rings B and C, and the rings C and D may be bound to each other to form a fused ring independently via the substituent R^A-D; X^A-D each represent a carbon atom or nitrogen atom; Q represents a bivalent atom or atomic group; Y represents a carbon or nitrogen atom; and n is an integer of 0 to 3.

The present invention provides an organic electroluminescent element having at least one organic layer including a luminescent layer between a pair of electrodes wherein at least one organic layer contains a metal complex of cyclic tetradentate ligand having a specific structure.

The present invention relates to a method and catalysts for the stereoselective addition of a nucleophile to a reactive π-bond of a substrate. The chiral, non-racemic catalysts of the present invention constitute the first examples of catalysts for nucleophilic additions that comprise a main-group metal and a tri- or tetra-dentate ligand.

The invention relates to a dipyridyl tetradentate ligand ruthenium complex as well as a preparation method of the complex and application of the complex to a reaction for hydrogenating ester compounds into alcohol compounds. A method for catalytically hydrogenating the ester compounds into the alcohol compounds by using the dipyridyl tetradentate ligand ruthenium complex is characterized by comprising the following steps: by taking 0.001mol% to 0.3mol% of the dipyridyl tetradentate ligand ruthenium complex based on the ester compounds, as a catalyst, adding 1mol%-10mol% of alkali based on the ester compounds, and catalytically hydrogenating the ester compounds into the corresponding alcohol compounds under the conditions that the temperature is 25-100 DEG C and the hydrogen pressure is 1-10MPa. The dipyridyl tetradentate ligand ruthenium complex is convenient to prepare, stable in structure and excellent in catalytic activity in hydrogenation reaction of the ester compounds. According to the preparation method, the shortcomings of requirements on high-temperature high-pressure reaction conditions and high catalyst consumption in an existing homogeneous or non-homogeneous catalytic hydrogenation system of the ester compounds are overcome, the catalyst consumption is low, the reaction conditions are mild, the reaction selectivity is good, and the economy and the safety of a production system are improved.

The invention belongs to the technical field of olefin polymerization catalysts, and discloses an [N,N,N,N] tetradentate ligand fourth subgroup transition metal complex and a preparation method and application thereof. The [N,N,N,N] tetradentate ligand fourth subgroup transition metal complex has the general structural formula I or II shown in the specifications. According to the preparation method, a toluene solution of a Ti or Zr or Hf halide and a toluene solution of a tetradentate ligand I are mixed and react for 1-12 hours, and solvent toluene is distilled off; the mixture continues reacting for 1-3 hours, and then a crude complex can be obtained; furthermore, recrystallization is conducted in organic solvent so as to obtain the complex with the general structural formula I. Serving as a main catalyst, the complex can be applied to catalytic ethylene polymerization. The complex is stable in structure, good in heat resistance, long in service life and high in catalytic activity; polyethylene obtained in catalytic ethylene polymerization has an ultra-high molecular weight.

(1E, 2E)-1,2-bi(5-methoxyl-2-diphenylphosphine benzylidene) hydrazine is a dual-phosphine ligand containing an imine group. An aromatic ring has methoxyl which supplies electrons so that double metal has the stronger coordination capability. According to the synthetic method, intermediate 5-methoxyl-2-(diphenylphosphino)benzaldehyde and hydrazine hydrate serve as raw materials, formic acid serves as a catalyst, and the raw materials and the formic acid flow back in methyl alcohol to obtain bis-imine bis-phosphine four-tooth ligand L. Bis-imine bis-phosphine four-tooth ligand L and Cu(CH3CN)4CIO4 in-situ catalytic Sonogashira cross coupling reaction is carried out, the catalytic system is very high (the yield reaches to 99%) in reactivity to aryl iodide and is active to aryl bromide to some degree, alkyne self-coupling products can be well avoided, the reactive system is simple, and post-processing is convenient. Adopted Cu is low in cost, easy to obtain, economical and clean, and takes part in the Sonogashira coupled reaction instead of expensive and toxicant Pd. No rganic amine used as a solvent or alkali is used. The (1E, 2E)-1,2-bi(5-methoxyl-2- diphenylphosphine benzylidene) hydrazine has very good application prospects in industrial production in the future.

Provided is an alcohol production method comprising the step of reducing an ester or a lactone with hydrogen to produce a corresponding alcohol without addition of a base compound by using, as a catalyst, a ruthenium complex represented by the following general formula (1):

RuH(X)(L¹)(L²)_n   (1)

wherein

• • X represents a monovalent anionic ligand,
  • L¹ represents a tetradentate ligand having at least one coordinating phosphino group and at least one coordinating amino group or a bidentate aminophosphine ligand having one coordinating phosphino group and one coordinating amino group, and
  • L² represents a bidentate aminophosphine ligand having one coordinating phosphino group and one coordinating amino group, provided that
  • n is 0 when L¹ is the tetradentate ligand, and n is 1 when L¹ is the bidentate aminophosphine ligand.

The invention provides an amine bis phenolate tetradentate ligand IV subgroup metal complex with large special resistance substituent and application thereof, and belongs to the technical field of catalysis. The structure expression of the complex is as below. The complex as a main catalyst, and a cocatalyst of a mixture of alkyl aluminum and a boron agent, or alkylaluminoxane constitute a catalytic system for catalysis of polymerization of ethylene. The synthesis method of the complex is simple, and has raw materials and low cost. The complex has easily modifiable structure, and has high catalytic activity, long catalyst life and high stability when it is used as the catalyst for the catalytic polymerization of ethylene.

The invention relates to the technical field of organic luminescent materials and provides a tetravalent metal platinum complex phosphorescent luminescent material containing a tetradentate ligand. The tetravalent metal platinum complex containing the tetradentate ligand has a structure shown in a first general formula. Meanwhile, the invention also provides a preparation method of the tetravalentmetal platinum complex containing the tetradentate ligand, an application of the tetravalent metal platinum complex containing the tetradentate ligand in an electroluminescent device and a device, the device comprises the tetravalent metal platinum complex containing the tetradentate ligand. According to the tetravalent metal platinum complex containing the tetradentate ligand, the structure of the ligand surrounding the metal center and the structure of the substituent group on the ligand are regulated and controlled to regulate and control the photophysical property of the tetradentate ringmetal platinum complex, and the tetravalent metal platinum complex has the advantage of high stability and has wide application prospect in a plurality of fields such as OLED display, illumination and the like.

The invention relates to a method for producing hydrogen by selective dehydration of formic acid using a catalytic system consisting of a transition metal complex of transition metal salt and at least one tripodal, tetradentate ligand, wherein the transition metal is selected from the group comprising Ir, Pd, Pt, Ru, Rh, Co and Fe. The transition metal complex can be used either as a homogeneous catalyst or a heterogenised metal complex, which has been applied to a carrier.

The present application, relates to iron bisphenolate complexes and methods of use and synthesis thereof. The iron complexes are prepared from tridentate or tetradentate ligands of Formula I: wherein R¹ and R² are as defined herein. Also provided are methods and processes of using the iron bisphenolate complexes as catalysts in cross-coupling reactions and in controlled radical polymerizations.

The invention belongs to the technical field of organic light-emitting materials, and in particular relates to aryl-substituted tetradentate ligand-coordinated platinum complexes as well as a synthesis method and application thereof. The aryl-substituted tetradentate ligand-coordinated platinum complexes comprise structural fragments shown in a formula I and a formula II. By introducing an aryl group into an organic ligand of a cyclic metal platinum complex, the blue light luminescence peaks of the obtained tetradentate ligand-coordinated platinum complexes are controlled to be within a rangeof 450-465 nm; the aryl-substituted tetradentate ligand-coordinated platinum complexes have the advantages of being pure in chromaticity and low in energy; therefore, an effective eye protection bluephosphorescent material is obtained. The formula I and the formula II are described in the description.

An organic electroluminescent device is provided and includes: a pair of electrodes; and at least one organic layer between the pair of electrodes, the at least one organic layer including a light-emitting layer. The at least one organic layer contains a compound represented by formula (I) below, and the light-emitting layer contains a phosphorescent material of a platinum complex having a tetradentate ligand.

R¹ to R⁹ each independently represents a specific substituent.

The invention relates to a platinum complex containing an ONCN tetradentate ligand and an application of the platinum complex in an organic light emitting diode. The platinum complex is a compound with a structure of a chemical formula (I), and the compound is applied to the organic light-emitting diode, has relatively low driving voltage and relatively high light-emitting efficiency, can remarkably prolong the service life of a device, and has potential to be applied to the field of organic light-emitting devices. The invention also provides an organic photoelectric device which comprises a cathode, an anode and an organic layer, the organic layer is one or more of a hole injection layer, a hole transport layer, a luminescent layer, a hole barrier layer, an electron transport layer and an electron injection layer, and at least one layer in the organic layer contains the compound in the structural formula (I).

The invention provides a [NNNN] tetradentate ligand fourth subgroup metal complex which has a structure as shown in a formula (I), wherein n is 2-4; R is an alkyl group of C1 to C30, an aryl group of C6 to C30 or a substituted aryl group of C6 to C30; X is halogen, a C1-C30 alkyl group, a silicon group, an amino group or a C6-C30 aryl group; and M is a fourth subgroup transition metal. The [NNNN] tetradentate ligand fourth subgroup metal complex provided by the invention has good thermal stability. In use, the catalyst has the characteristics of low usage amount of a cocatalyst, high catalytic activity, good thermal stability and long catalytic life; the catalyst can catalyze ethylene polymerization to obtain ultrahigh molecular weight polyethylene, ethylene and 1-octylene copolymerization, and the comonomer insertion rate is high.

The invention relates to the technical field of organic luminescent materials, and provides a tetradentate cyclometalated platinum (II) complex based on carboxyl coordination and containing pyridyl acridine and application of the tetradentate cyclometalated platinum (II) complex. The tetradentate cyclometalated platinum (II) complex has a structure as shown in a general formula (I) which is described in the specification. According to the tetradentate cyclometalated platinum (II) complex, a tetradentate ligand containing an oxygen anion strong field ligand is adopted, so coordination capacityis high, rigidity is high, and quantum efficiency and light stability can be improved at the same time.

This invention relates to novel, substantially enantiomerically pure tetradentate ligands comprised of two phosphines and two secondary amines. These species have been used as ligands for metal catalysts for asymmetric reactions and have demonstrated good enantioselectivity, in particular as ruthenium complexes for asymmetric hydrogenation. Also disclosed are methods for making the ligands, corresponding catalyst complexes, and processes employing the ligands and catalysts. The ligands may be described by the general formula 1:

R₂P-L¹-NH-L²-NH-L³-PR¹₂   1

The present invention provides a four-dentate ligand Pt complex used for OLED materials and using aza fluorene as a base unit, wherein the structure is represented by a general formula (I) defined in the specification, R1-R8 are independently and respectively selected from hydrogen, alkyl, heteroalkyl, aryl or heteroaryl, X1 and X2 are independently and respectively selected from C and N, and preferably the four-dentate ligand Pt complex is a CNCN four-dentate ligand Pt complex. The present invention further provides the OLED material and the OLED device of the four-dentate ligand Pt complex using aza fluorene as a base unit. According to the present invention, with the application of the complex as the guest material in the light emitting material, the advantages of good thermal stability, high light emitting efficiency, long service life and the like can be provided; and the four-dentate ligand Pt complex can further be used in AMOLED industry.

The invention provides a novel [NOON] tetradentate ligand fourth subgroup metal complex, which has a structure as shown in formula (I): wherein R1 is hydrogen, halogen, alkyl of C1-C30, aryl of C6-C30 or substituted aryl of C6-C30; R2 is hydrogen, halogen, alkyl of C1 to C30, aryl of C6 to C30 or substituted aryl of C6 to C30; R3 is hydrogen, halogen, alkyl of C1 to C30, aryl of C6 to C30 or substituted aryl of C6 to C30; X is halogen, an alkyl group of C1 to C30 or an aryl group of C6 to C30; A is biphenyl or binaphthalene; and M is a fourth subgroup transition metal. The novel [NOON] tetradentate ligand fourth subgroup metal complex provided by the invention has good thermal stability. When in use, the catalyst has the characteristics of low usage amount of a cocatalyst, high catalytic activity, good thermal stability and long catalytic life, and can catalyze copolymerization of ethylene and 1-octylene at the same time.