1538-08-5Relevant articles and documents
Design, synthesis, biological evaluation and computational study of novel triazolo [4,3-a]pyrazin analogues
Jethava, Divya J.,Acharya, Prachi T.,Vasava, Mahesh S.,Bhoi, Manoj N.,Bhavsar, Zeel A.,Rathwa, Sanjay K.,Rajani, Dhanji P.,Patel, Hitesh D.
, p. 168 - 192 (2019/03/04)
The triazolo [4,3-a]pyrazin analogues are of interest due to their potential activity against various infectious and non-infectious disease. In search of suitable potent drug candidate, we report here the design, synthesis, characterization, biological activities and computation study of novel triazolo [4,3-a]pyrazin analogues. The synthesized molecules were characterized by various spectroscopic studies such as IR, Mass, 1H NMR, 13C NMR and elemental analysis. The newly synthesized compounds were evaluated for their in vitro biological activities such as anti-malarial, anti-tuberculosis, anti-bacterial and anti-fungal activities against plasmodium falciparum, H37Rv, various bacterial and fungal strains, respectively. The molecular docking study was carried out with enzyme aspartic proteinase zymogen proplasmepsin II from plasmodium falciparum to analyze their binding orientation in the active site of the aspartic proteinase enzyme. The best docking complex was subjected to molecular dynamics simulation to illustrate the stability of these complexes and the most prominent interactions during the simulated trajectory. We have also calculated ADMET properties of all the synthesized compounds to predict the pharmacokinetic properties for the selection of the active and bioavailability of compounds.
ORGANOMETALLIC COMPLEXES, ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME AND DISPLAY
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Paragraph 0122-0125, (2020/03/17)
The present invention relates to an organic metal complex, an organic electroluminescence device using the same and a display device, and provided is an organic metal complex indicated as chemical formula 1 below. [Chemical Formula 1] Definition of the chemical formula 1 exists in the application.
Blue phosphorescent bipyridine-based iridium(III) complex for vacuum-deposited organic light-emitting diodes
Jang, Jae-Ho,Park, Jeong Yong,Kim, Hee Un,Park, Hea Jung,Kang, In-Nam,Lee, Jun Yeob,Hwang, Do-Hoon
, p. 7047 - 7052 (2018/06/29)
We have synthesized and characterized a blue phosphorescent iridium(III) complex (dfpypy)2Ir(tftamp), which contains 2,6-difluoro-2,3-bipyridine (dfpypy) as the main ligand and 4-methyl-2-(3-trifluoromethyl-1H-1,2,4-triazol-5-yl)pyridine (tftamp) as the ancillary ligand. The photophysical, electrochemical, and electroluminescent (EL) properties of (dfpypy)2Ir(tftamp) were investigated. Vacuum-deposited blue and white organic light-emitting diodes (OLEDs) were fabricated using (dfpypy)2Ir(tftamp) in 1,3-bis(carbazol-9-yl)benzene (mCP) as the emitting layer. The EL spectrum of (dfpypy)2Ir(tftamp) exhibited emission maximum at 472 nm with a full-width at half-maximum (FWHM) of 81 nm and Commission Internationale de L’Eclairage (CIE) coordinates of (0.17, 0.27) at 100 cd · m?2. In addition, white-light-emitting devices were fabricated, which exhibited CIE coordinates of (0.42, 0.40) and a correlated color temperature (CCT) of 3,237 K at 1000 cd · m?2, close to the standard warm-white light CIE coordinates of (0.44, 0.40) and CCT of 3,000 K.
Synthetic method of 1,3,4-thiadiazole derivative
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Paragraph 0038; 0039, (2018/12/05)
The invention discloses a synthetic method of a 1,3,4-thiadiazole derivative. The method comprises the following steps: (1) using hydrazine hydrate as a raw material, under the action of a catalyst, reacting with acid, to obtain a hydrazide compound I; (2) using alkyl chloroformate and thiocyanate to react in a condition of a solvent, to obtain an isothiocyanate compound II; (3) in a reaction system of the isothiocyanate compound II, adding solution containing the compound I, reacting to obtain solution containing a compound III; (4) processing the solution of the compound III by dehydrating,neutralizing, and washing, to obtain a compound IV; (5) in the conditions of an acid-binding agent and a solvent, adding alkyl halide or sulfuric acid diester into the compound IV, reacting to obtaina compound V; and (6) enabling the compound V to perform an amination reaction with primary amine, to obtain the 1,3,4-thiadiazole derivative VI. The preparation method has the advantages of green andno pollution, simple and convenient operation, higher yield, mild reaction condition and the like.
Rational design and characterization of heteroleptic phosphorescent iridium(iii) complexes for highly efficient deep-blue OLEDs
Feng, Yansong,Zhuang, Xuming,Zhu, Dongxia,Liu, Yu,Wang, Yue,Bryce, Martin R.
supporting information, p. 10246 - 10252 (2016/11/17)
Two new deep-blue iridium(iii) complexes, (dfpypy)2IrFptz (Ir1) and (Medfpypy)2IrFptz (Ir2), comprising difluoro-bipyridyl (dfpypy) derivatives as cyclometaling ligands and a chelated pyridyl-triazole (Fptz) ancillary ligand are reported. The bipyridyl ligands lead to a significantly increased HOMO-LUMO gap and a hypsochromic shift of the phosphorescence compared to phenylpyridyl analogs. Density function theory (DFT) calculations and electrochemical measurements for Ir1 and Ir2 support their genuine blue phosphorescent emission. The combination of ancillary and cyclometalating ligands in Ir1 and Ir2 significantly influences the molecular orbitals of both complexes, leading to clearly distinct electron density distributions of the HOMO and LUMO compared with other blue-emitting Ir(iii) derivatives. Both complexes Ir1 and Ir2 show deep-blue emission with λmax values in the region of 435-465 nm with high PLQYs and short excited-state lifetimes. The phosphorescent organic light emitting diodes (PhOLEDs) based on Ir1 and Ir2 achieve remarkably high EL performance with low efficiency roll-off at high luminance. The bluest color (CIEx,y 0.14, 0.11) and the highest EL efficiency were achieved in the device based on Ir2 (Device 2), where the peak EQE/PE of 13.0%/11.2 lm W-1 together with the corresponding values of 12.6%/8.8 lm W-1 and 10.1%/5.0 lm W-1 at the practical luminances of 100 and 1000 cd m-2 respectively, strongly compete with those of any deep-blue fluorescent and/or phosphorescent OLEDs with similar CIE coordinates previously reported.
Blue-emitting Ir(III) complexes using fluorinated bipyridyl as main ligand and 1,2,4-triazol as ancillary ligand: syntheses, photophysical properties and performances in devices
Sun, Peng,Wang, Kexiang,Zhao, Bo,Yang, Tingting,Xu, Huixia,Miao, Yanqin,Wang, Hua,Xu, Bingshe
supporting information, p. 8335 - 8341 (2016/12/02)
The blue-light-emitting Ir(III) complexes using 2-(3-(trifluoromethyl) -1H-1,2,4-triazol-5-yl)pyridine and fluorinated 2-phenylpyridine as ligands were synthesized and characterized in details. Their molecular structures were confirmed by1H NMR
Efficient synthesis of tri- and difluoroacetyl hydrazides as useful building blocks for non-symmetrically substituted, fluoroalkylated 1,3,4-oxadiazoles
Mlostoń, Grzegorz,Obijalska, Emilia,?urawik, Alicja,Heimgartner, Heinz
, p. 133 - 139 (2016/07/06)
[Figure not available: see fulltext.] A convenient and efficient approach to 2-arylamino-5-fluoroalkyl-1,3,4-oxadiazoles has been established via heterocyclization of tri- and difluoroacetylated thiosemicarbazides using dicyclohexylcarbodiimide. A heteroc
Scanning-tunneling-spectroscopy-directed design of tailored deep-blue emitters
Sanning, Jan,Ewen, Pascal R.,Stegemann, Linda,Schmidt, Judith,Daniliuc, Constantin G.,Koch, Tobias,Doltsinis, Nikos L.,Wegner, Daniel,Strassert, Cristian A.
supporting information, p. 786 - 791 (2015/03/05)
Frontier molecular orbitals can be visualized and selectively set to achieve blue phosphorescent metal complexes. For this purpose, the HOMOs and LUMOs of tridentate PtII complexes were measured using scanning tunneling microscopy and spectroscopy. The introduction of electron-accepting or -donating moieties enables independent tuning of the frontier orbital energies, and the measured HOMO-LUMO gaps are reproduced by DFT calculations. The energy gaps correlate with the measured and the calculated energies of the emissive triplet states and the experimental luminescence wavelengths. This synergetic interplay between synthesis, microscopy, and spectroscopy enabled the design and realization of a deep-blue triplet emitter. Finding and tuning the electronic "set screws" at molecular level constitutes a useful experimental method towards an in-depth understanding and rational design of optoelectronic materials with tailored excited state energies and defined frontier-orbital properties.
AROMATIC HETEROCYCLIC COMPOUND
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Paragraph 0653; 0654, (2015/05/05)
The compound represented by the general formula: wherein ring A is benzene which may be substituted and the like; ring B is benzene which may be substituted and the like; X is a single bond and the like; Y is alkyl which may be substituted and the like; Z is CR1 or nitrogen atom; R1 is hydrogen and the like; R2 is alkyl which may be substituted and the like or a pharmaceutically acceptable salt thereof is useful as a prevention/treatment agent of obesity, diabetes, and the like.
Rational design, synthesis, and characterization of deep blue phosphorescent Ir(III) complexes containing (4′-Substituted-2′- pyridyl)-1,2,4-triazole ancillary ligands
Park, Hea Jung,Kim, Ji Na,Yoo, Hyun-Ji,Wee, Kyung-Ryang,Kang, Sang Ook,Cho, Dae Won,Yoon, Ung Chan
, p. 8054 - 8064 (2013/09/12)
On the basis of the results of frontier orbital considerations, 4-substituted-2′-pyridyltriazoles were designed to serve as ancillary ligands in 2-phenylpyridine main ligand containing heteroleptic iridium(III) complexes that display deep blue phosphorescence emission. The iridium(III) complexes, Ir1-Ir7, prepared using the new ancillary ligands, were found to display structured, highly quantum efficient (Φp = 0.20-0.42) phosphorescence with emission maxima in the blue to deep blue 448-456 nm at room temperature. In accord with predictions based on frontier orbital considerations, the complexes were observed to have emission properties that are dependent on the electronic nature of substituents at the C-4 position of the pyridine moiety of the ancillary ligand. Importantly, placement of an electron-donating methyl group at C-4′ of the pyridine ring of the 5-(pyridine-2′-yl)-3-trifluoromethyl-1,2,4-triazole ancillary ligand leads to an iridium(III) complex that displays a deep blue phosphorescence emission maximum at 448 nm in both the liquid and film states at room temperature. Finally, an OLED device, constructed using an Ir-complex containing the optimized ancillary ligand as the dopant, was found to emit deep blue color with a CIE of 0.15, 0.18, which is close to the perfect goal of 0.15, 0.15.