Day: November 23, 2022

Hung, Jui-Yi published the artcilePhosphorescent Ir(III) Complexes Bearing Double Benzyldiphenylphosphine Cyclometalates; Strategic Synthesis, Fundamental and Integration for White OLED Fabrication, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Journal of Materials Chemistry (2010), 20(36), 7682-7693, database is CAplus.

A new Ir(III) complex [Ir(bdp)₂(OAc)] (1) was prepared by the treatment of IrCl₃(tht)₃ with approx. two equiv of benzyldiphenylphosphine in refluxing decalin solution(bdpH = benzyldiphenylphosphine and tht = tetrahydrothiophene). Complex 1 proves to be a versatile precursor, which could further react with various triazolate chelates such as 5-pyridyl-3-trifluoromethyl-1,2,4-triazole (fptzH), 3-tert-butyl-5-(2-pyridyl)-1,2,4-triazole (bptzH), 5-(1-isoquinolyl)-3-tert-butyl-1,2,4-triazole (iqbtzH) and 5-(1-phenanthridinyl)-3-tert-butyl-1,2,4-triazole (pbtzH) to afford the emissive complexes [Ir(bdp)₂(fptz)] (2), [Ir(bdp)₂(bptz)] (3), [Ir(bdp)₂(iqbtz)] (4), and [Ir(bdp)₂(phbtz)] (5), resp. Single crystal x-ray diffraction studies of 1 and 5 revealed a distorted octahedral Ir(III) metal core; both possess two mutually orthogonal bdp cyclometalates, and the resp. PPh₂ donors reside at the cis-orientation. Formation of complexes 2–5 can be envisioned as simple replacement of acetate with the incoming N-heterocyclic triazolate chelates. As for photophys. properties, the structural variation leads to salient differences in emission features among complexes 2–5. Combining theor. approaches, the results are rationalized by the contribution from the degree of ligand π-conjugation, together with the occurrence of ligand-to-ligand charge transfer (LLCT) and intra-ligand ππ* transition in the lowest lying excited state. The orange-red and white light-emitting OLEDs were then fabricated using 5 as dopant, for which the resp. devices gave peak efficiencies of 13.6% photons/electron, 33.3 cd A^-1, 29.8 lm/W and with CIE_x,y = 0.530, 0.467 at 100 cd m^-2, and peak efficiencies of 13.0% photons/electron, 28.0 cd A^-1, 22.8 lm/W, and with CIE_x,y = 0.356, 0.348 at 1000 cd m^-2.

Journal of Materials Chemistry published new progress about 219508-27-7. 219508-27-7 belongs to triazoles, auxiliary class Trifluoromethylated Building Blocks, name is 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, and the molecular formula is C8H5F3N4, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Chou, Ho-Hsiu published the artcileNew Iridium Dopants for White Phosphorescent Devices: Enhancement of Efficiency and Color Stability by an Energy-Harvesting Layer, Quality Control of 219508-27-7, the publication is ACS Applied Materials & Interfaces (2013), 5(13), 6168-6175, database is CAplus and MEDLINE.

A new light blue complex (fmoppy)₂Ir(tfpypz) [bis(4′-fluoro-6′-methoxylphenylpyridinato)[3-(trifluoromethyl)-5-(pyridin-2-yl)-1,2,4-triazolato]iridium] and a new orange complex (dpiq)₂Ir(acac) [acetylacetonatobis(3,4-diphenylisoquinoline)iridium] were synthesized. These 2 complexes were used as the dopants for the fabrication of 2-element white phosphorescent devices. Via the introduction of a thin energy-harvesting layer (EHL) to harvest the extra energy and exciton from the emission zone, highly efficient 2-element white devices with excellent color stability were created. One of the best devices shows yellow-white color emission with an extremely high external quantum efficiency (EQE) of 21.5% and a current efficiency of 68.8 cd/A. The other device gave a pure white emission with an external quantum efficiency of 19.2% and a current efficiency of 53.2 cd/A. At a high brightness of 1000 cd/m², the EQE still remains ≤18.9 and 17.2%. With a brightness of 1000-10000 cd/m², the CIE coordinates of these 2 devices shift by only (0.02, ≤0.01). The white phosphorescent devices with the EHL showed much higher efficiency and better color stability than the 1 without the EHL. Crystallog. data are given.

ACS Applied Materials & Interfaces published new progress about 219508-27-7. 219508-27-7 belongs to triazoles, auxiliary class Trifluoromethylated Building Blocks, name is 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, and the molecular formula is C8H5F3N4, Quality Control of 219508-27-7.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Wang, Nan published the artcileDesign, synthesis and in vitro antifungal activities of fluconazole derivatives, Recommanded Product: 1-((2-(2,4-Difluorophenyl)oxiran-2-yl)methyl)-1H-1,2,4-triazole methanesulfonate, the publication is Youji Huaxue (2012), 32(5), 922-929, database is CAplus.

In search of more effective antifungal agents, twenty-two new fluconazole derivatives containing 4-Me phenol and thymine have been designed and synthesized based on the previous results of computer-aided drug design. All the derivatives retain the essential pharmacophore of fluconazole. Their structures are elucidated by ¹H NMR, elemental anal. and ESI-MS. Preliminary in vitro antifungal activities bioassay showed that compound I exhibits better in vitro antifungal activities against eight fungi except Aspergillus fumigatus (7544) than fluconazole. The introduction of propargyl group to nitrogen atom can enhance in vitro antifungal activities of this type derivative and it is worth of further research.

Youji Huaxue published new progress about 86386-77-8. 86386-77-8 belongs to triazoles, auxiliary class Epoxides,Triazole,Fluoride,Salt,Sulfonic acid,Benzene, name is 1-((2-(2,4-Difluorophenyl)oxiran-2-yl)methyl)-1H-1,2,4-triazole methanesulfonate, and the molecular formula is C11H14O2, Recommanded Product: 1-((2-(2,4-Difluorophenyl)oxiran-2-yl)methyl)-1H-1,2,4-triazole methanesulfonate.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Qin, Jian published the artcileThe nitrogen-rich energetic compound 4-carboxamide-5-(1H-tetrazol-5-yl)-1H-1,2,3-triazole and its 1D sodium complex: synthesis and properties, Safety of 1H-1,2,3-Triazole-4,5-dicarbonitrile, the publication is RSC Advances (2016), 6(103), 101430-101436, database is CAplus.

The new nitrogen-rich energetic compound 4-carboxamide-5-(1H-tetrazol-5-yl)-1H-1,2,3-triazole (2) and its sodium complex (3) have been synthesized using diaminomaleodinitrile as the starting material in a three step synthesis. Both of the compounds were comprehensively characterized using Fourier transform-IR spectroscopy (FT-IR), mass spectrometry (MS) and elemental anal. (EA). The sodium complex of 4-carboxamide-5-(1H-tetrazol-5-yl)-1H-1,2,3-triazole was confirmed using single-crystal X-ray diffraction for the first time. The thermal stability of the two compounds has been measured using differential scanning calorimetry (DSC), which indicated that the decomposition peak temperatures were 332.6 °C (2) and 374.1 °C (3). The d. and enthalpy of formation of 2 were calculated with Gaussian 09 and the detonation pressure (21.9 GPa) and the detonation velocity (7182 m s^-1) were predicted by Kamlet-Jacobs equations. Compound 2 was not sensitive to impact (>40 J) or friction (>360 N).

RSC Advances published new progress about 53817-16-6. 53817-16-6 belongs to triazoles, auxiliary class Triazoles, name is 1H-1,2,3-Triazole-4,5-dicarbonitrile, and the molecular formula is C4HN5, Safety of 1H-1,2,3-Triazole-4,5-dicarbonitrile.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Hu, Wei-Kang published the artcileBlue-to-green electrophosphorescence from iridium(III) complexes with cyclometalated pyrimidine ligands, Formula: C8H5F3N4, the publication is Dyes and Pigments (2018), 284-292, database is CAplus.

A series of 4, 6-disubstituted pyrimidine based iridium(III) complexes (1-5), has been synthesized with a simple method. Single X-ray structural analyses were conducted on 5 to reveal their coordination arrangement. These complexes exhibit almost single peak emission with the peak wavelength located in the range of 468-505 nm and quantum yields of over 75%. The relationship between photophys. properties and the substituent nature of the complexes was discussed by d. functional theory. Organic light-emitting diodes (OLEDs) were also fabricated using these complexes as dopants in 15 wt%. The green device based on 1 shows a maximum external quantum efficiency, current efficiency, and power efficiency of 9.7%, 46.5 cd A^-1 and 29.0 lm W^-1, resp., while the blue device based on 5 exhibits an external quantum efficiency of up to 14.5%, peak luminance efficiency of 28.0 cd A^-1 and power efficiency of 19.5 lm W^-1. Moreover, the Commission Internationale de L’Eclairage (CIE) coordinates of 5 are (0.15, 0.30) which is closer to blue emission than that of FIrpic.

Dyes and Pigments published new progress about 219508-27-7. 219508-27-7 belongs to triazoles, auxiliary class Trifluoromethylated Building Blocks, name is 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, and the molecular formula is C8H5F3N4, Formula: C8H5F3N4.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Yang, Cheng-Han published the artcileHeteroleptic Cyclometalated Iridium(III) Complexes Displaying Blue Phosphorescence in Solution and Solid State at Room Temperature, SDS of cas: 219508-27-7, the publication is Inorganic Chemistry (2005), 44(22), 7770-7780, database is CAplus and MEDLINE.

A series of heteroleptic Ir(III) metal complexes 1–3 bearing two N-phenyl-substituted pyrazoles and one 2-pyridyl pyrazole (or triazole) ligands were synthesized and characterized to attain highly efficient, room-temperature blue phosphorescence. The N-phenylpyrazole ligands, dfpzH = 1-(2,4-difluorophenyl)pyrazole, fpzH = 1-(4-fluorophenyl)pyrazole, dfmpzH = 1-(2,4-difluorophenyl)-3,5-dimethylpyrazole, and fmpzH = 1-(4-fluorophenyl)-3,5-dimethylpyrazole, show a similar reaction pattern with respect to the typical cyclometalated (C-N) chelate, which utilizes its ortho-substituted Ph segment to link with the central Ir(III) atom, while the second 2-pyridylpyrazole (or triazole) ligand, namely, fppzH = 3-(trifluoromethyl)-5-(2-pyridyl)pyrazole, fptzH = 3-(trifluoromethyl)-5-(2-pyridyl)triazole, and hptzH = 3-(heptafluoropropyl)-5-(2-pyridyl)triazole, undergoes typical anionic (N-N) chelation to complete the octahedral framework. X-ray structural analyses on complexes [(dfpz)₂Ir(fppz)] (1a) and [(fmpz)₂Ir(hptz)] (3d) were established to confirm their mol. structures. Increases of the ππ^* energy gaps of the Ir(III) metal complexes were systematically achieved with two tuning strategies. One involves the substitution for one or two fluorine atoms at the N-Ph segment or the introduction of two electron-releasing Me substituents at the pyrazole segment of the H(C-N) ligands. Alternatively, we have applied the more electron-accepting triazolate in place of the pyrazolate segment for the third (N-N)H ligand. Our results, on the basis of steady-state, relaxation dynamics, and theor. approaches, lead to a conclusion that, for complexes 1–3, the weakening of iridium metal-ligand bonding strength in the T₁ state plays a crucial role for the fast radiationless deactivation. For the case of [(fmpz)₂Ir(hptz)] (3d), a thermal deactivation barrier of 4.8 kcal/mol was further deduced via temperature-dependent studies. The results provide a theor. basis for future design and synthesis of the corresponding analogs suited to blue phosphorescent emitters.

Inorganic Chemistry published new progress about 219508-27-7. 219508-27-7 belongs to triazoles, auxiliary class Trifluoromethylated Building Blocks, name is 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, and the molecular formula is C8H6ClNO, SDS of cas: 219508-27-7.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Ko, Wai Kin D. published the artcileA preclinical study on the combined effects of repeated eltoprazine and preladenant treatment for alleviating L-DOPA-induced dyskinesia in Parkinson’s disease, Recommanded Product: 2-(Furan-2-yl)-7-(2-(4-(4-(2-methoxyethoxy)phenyl)piperazin-1-yl)ethyl)-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidin-5-amine, the publication is European Journal of Pharmacology (2017), 10-16, database is CAplus and MEDLINE.

Eltoprazine, a serotonergic (5-HT)₁A/B receptor agonist, is a potential treatment for L-DOPA-induced dyskinesia (LID) in Parkinson’s disease (PD) but notably compromises the anti-parkinsonian effects of L-DOPA, as seen in rodent and monkey models of PD. Preladenant, a selective adenosine A_2a receptor antagonist, mediates modest anti-parkinsonian effects in parkinsonian monkeys. In a recent investigation, combined eltoprazine and preladenant treatment with a sub-threshold dose of L-DOPA acutely attenuated dyskinesia without exacerbating PD disability in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated macaques. The aim of this study was to investigate the daily repeated treatment effects of eltoprazine (1 mg/kg) alone, and in combination with preladenant (5 mg/kg), on the motor symptoms of PD and LID in MPTP-treated macaques. The anti-dyskinetic and -parkinsonian effects of combinative drug administration with a sub-threshold dose of L-DOPA were measured over 14 days. Eltoprazine treatment alone produced a near-complete suppression of dyskinesia but consistently increased parkinsonism. The administration of preladenant with eltoprazine prevented the increased severity of parkinsonian motor symptoms but was unable to maintain a reduced expression of dyskinesia with repeated administration. These data demonstrate the clin. utility of the modulation of the serotonergic and adenosine neurotransmitter systems with selective pharmacol. agents for only acute treatment of LID. This multi-targeted approach is unsuitable as a long-term treatment regimen due to unsustainable therapeutic effects on dyskinesia.

European Journal of Pharmacology published new progress about 377727-87-2. 377727-87-2 belongs to triazoles, auxiliary class GPCR/G Protein,Adenosine Receptor, name is 2-(Furan-2-yl)-7-(2-(4-(4-(2-methoxyethoxy)phenyl)piperazin-1-yl)ethyl)-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidin-5-amine, and the molecular formula is C25H29N9O3, Recommanded Product: 2-(Furan-2-yl)-7-(2-(4-(4-(2-methoxyethoxy)phenyl)piperazin-1-yl)ethyl)-7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidin-5-amine.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Xin, Zhen-dong published the artcileEffect of hydrogen bond on trigger bond strength of nitrotriazole, Formula: C2H2N4O2, the publication is Zhongbei Daxue Xuebao, Ziran Kexueban (2013), 34(3), 280-287, 292, database is CAplus.

The changes of bond dissociation energy(BDE) in the C-NO₂ bond upon the formation of the intermol. hydrogen-bonding interaction between HF and the nitro group of 14 kinds of nitrotriazoles and Me derivatives were investigated using the B3LYP and MP2(full) methods on the 6-311+ +G^**, 6-311++G(2df, 2p) and aug-cc-pVTZ basis sets. The result shows that the strength of the C-NO₂ bond is enhanced and the neg. charge of nitro group is increased upon complex formation. The increment of the C-NO₂ bond dissociation energies(ΔBDE) correlates well with the intermol. H-bonding interaction energies. Electron d. shifts toward the C-NO₂ bond upon complex, leading to the stronger C-NO₂ bond and weakening explosive sensitivity.

Zhongbei Daxue Xuebao, Ziran Kexueban published new progress about 14544-45-7. 14544-45-7 belongs to triazoles, auxiliary class Triazoles, name is 5-Nitro-1H-1,2,3-triazole, and the molecular formula is C4H11NO, Formula: C2H2N4O2.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Xia, Yajun published the artcileSynthesis of new antifungal agents sulfur-containing triazole compounds, Category: triazoles, the publication is Zhejiang Yike Daxue Xuebao (1995), 24(2), 70-4, database is CAplus.

Title compounds I (R = PhS, 2-pyridylthio, benzimidazolylthio, benzothiazolylthio, triazolylthio, etc.) were prepared by reaction of epoxides II methanesulfonates with RH. The in vitro antifungal activities of these compounds were determined

Zhejiang Yike Daxue Xuebao published new progress about 86386-77-8. 86386-77-8 belongs to triazoles, auxiliary class Epoxides,Triazole,Fluoride,Salt,Sulfonic acid,Benzene, name is 1-((2-(2,4-Difluorophenyl)oxiran-2-yl)methyl)-1H-1,2,4-triazole methanesulfonate, and the molecular formula is C22H32O2, Category: triazoles.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics

Tung, Yung-Liang published the artcileOrganic light-emitting diodes based on charge-neutral Os(II) emitters: generation of saturated red emission with very high external quantum efficiency, Category: triazoles, the publication is Journal of Materials Chemistry (2005), 15(4), 460-464, database is CAplus.

The authors report the syntheses of three sublimable charge neutral Os(II) triazolate complexes. Red-emitting organic electroluminescent devices employing one of the materials, either as a dopant in a 4,4′-N,N‘-dicarbazolyl-1,1′-biphenyl or as a neat film, were constructed and evaluated. Changing the hole-transport layer in the devices from 4,4’-bis[N-(1-naphthyl)-N-phenylamino]biphenyl NPB to 9,9-bis(4-di(p-biphenyl)aminophenyl)fluorene (BPAPF) was observed to produce an increase in quantum efficiency, attributed to the higher hole mobility of BPAPF.

Journal of Materials Chemistry published new progress about 219508-27-7. 219508-27-7 belongs to triazoles, auxiliary class Trifluoromethylated Building Blocks, name is 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, and the molecular formula is C20H21ClN4O4, Category: triazoles.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics