85877-63-0

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• 134-81-6 benzil 
• 4085-18-1 4-amino-3-nitrobiphenyl 
• 65690-69-9 N-([1,1'-biphenyl]-4-yl)-4-methylbenzenesulfonamide 
• 858005-39-7 N-(3-nitro-biphenyl-4-yl)-toluene-4-sulfonamide 
• 875-51-4 4-Bromo-2-nitroaniline 
• 1575-37-7 4-Bromo-benzene-1,2-diamine 
• 216387-73-4 6-bromo-2,3-diphenylquinoxaline 
• 98-80-6 phenylboronic acid 
• 49764-63-8 4,5-dibromo-1,2-diaminobenzene 
• 1123652-64-1 6,7-dibromo-2,3-diphenyl-quinoxaline 

Relevant academic research and scientific papers

Novel quinoxaline luminescent material as well as preparation method and application thereof

The invention belongs to the field of organic semiconductor materials, and discloses a novel quinoxaline organic light-emitting material and a preparation method and application thereof. The quinoxaline luminescent material has a molecular structural formula shown in the specification, wherein R substituent is selected from one of halogen, substituted aromatic hydrocarbon with 5-30 carbon atoms, aryloxy with 6-50 ring atoms, aromatic amine with 5-30 carbon atoms, boron aromatic hydrocarbon with 6-20 carbon atoms, or aromatic heterocyclic group with 5-40 ring atoms. The organic light-emitting material disclosed by the invention has symmetrical and asymmetric functionalized quinoxaline molecular structures, substituent groups are introduced into specific 6 and 7 sites, the conjugation lengthis increased, and the coplanarity of molecules is destroyed, so that pi-pi accumulation is inhibited, the light-emitting efficiency and quantum yield of the material are improved, and the color regulation of the light-emitting material is relatively wide; therefore, the prepared organic luminescent material has good thermostability in air, is high in color purity and excellent in optical performance.

A novel one-pot synthesis of quinoxaline derivatives in fluorinated alcohols

Hexafluoroisopropanol (HFIP) is explored as an effective medium for the synthesis of quinoxaline derivatives in high yields at room temperature. The solvent (HFIP) can be readily separated from reaction products and recovered in excellent purity for direc

Ligand-controlled highly regioselective and asymmetric hydrogenation of quinoxalines catalyzed by ruthenium n-heterocyclic carbene complexes

(Chemical Equation Presented) Inflating flat bicycles: Proper choice of the N-heterocyclic carbene (NHC) ligand in Ru NHC complexes allows the completely regioselective ligand-controlled hydrogenation of either the heterocyclic or the carbocyclic ring of

Gallium(III) triflate-catalyzed synthesis of quinoxaline derivatives

Gallium(III) triflate-catalyzed reactions of phenylene-1,2-diamines and 1,2-diketones produce quinoxalines in excellent to quantitative yields. The reactions proceed with 1 mol % catalyst in ethanol at room temperature. The catalyst can be recycled for at

Spectral-luminescent properties of 2,3-diphenyl-6-X-quinoxalines

A study is made of the spectral-luminescent properties of solutions of 2- and 6-phenylquinoxalines and 2,3-diphenyl-6-X-quinoxalines (X = H, CH3, OC2H5, NH2, C6H5, C6H5O, C6H5CHOH, I, Br, Cl) in a hydrocarbon and 95% ethanol at 295 and 77 K. The energies of the S1 and T1 states obtained (25 600-27 700 and 18 500-20 000 cm-1, respectively) are correlated to the nature of the substituents. The mixed character of the luminescence is inferred from the close location of the S(ππ*) and S(nπ*) levels for the majority of the compounds. The contribution from the ππ* component increases with increasing electron-donating power of the substituent, as well as in going from nonpolar to polar solvent. The quantum yields of fluorescence φ = 10-4-1.1 × 10-1, of the intercombination transition φST = 0.3-0.9, and of phosphorescence φph = 0.2-0.9, the phosphorescence lifetime (τph = 10-3-0.57 s), as well as the established phenomenon of phosphorescence of liquid solutions, are analyzed in the framework of the vibronic and spin-orbit coupling schemes and conformational changes caused by excitation. The difference in the luminescent properties of 2,3-diphenyl-6-aminoquinoxalines from its examined analogs is due to a low energy of the S1(ππ*) level (21 200 cm-1 in alcohol), which is responsible for intense fluorescence (φf -0.5 in alcohol) and very weak phosphorescence.