Category: 219508-27-7

Sun, Peng published the artcileBlue-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, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Tetrahedron (2016), 72(50), 8335-8341, database is CAplus.

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 mol. structures were confirmed by ¹H NMR, FT-IR and elemental analyzer. The emission peaks of complex (F_2,4ppy)₂Ir(tfmptz) using 2-(2,4-difluorophenyl)pyridine as main ligand are located at 457 and 481 nm. Increasing the number of F atoms leads to a lower the LUMO energy level. Phosphorescent organic light-emitting devices doped the synthesized Ir(III) complexes into 4,4′-N,N’-dicarbazolebiphenyl as emitting layers were fabricated. The based-(F_3,4,5ppy)₂Ir(tfmptz) device shows the maximum current efficiency of 9.9 cd/A with the electroluminescent peaks at 471 and 502 nm.

Tetrahedron 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 C4H5F3O, 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

Xu, Huixia published the artcileTwo novel bipolar Ir(III) complexes based on 9-(4-(pyridin-2-yl)phenyl)-9H-carbazole and N-heterocyclic ligand, Product Details of C8H5F3N4, the publication is Dyes and Pigments (2017), 316-322, database is CAplus.

Two novel bipolar Ir(III) complexes named (Czppy)₂Ir(tfmptz) and (Czppy)₂Ir(pptz) were synthesized and characterized, where the Czppy is 9-(4-(pyridin-2-yl)phenyl)-9H-carbazole, Htfmptz refers to 2-(3-(trifluoromethyl)-1H-1,2,4-triazol-5-yl)pyridine and Hpptz represents 2-(1H-tetrazol-5-yl)pyridine, resp. Their mol. structures were confirmed by ¹H NMR and photophys. were studied. The performances in phosphorescent organic light emitting devices (PhOLEDs) were characterized by a heavy doping concentration of 20% in host as emitting layer. The results suggest that the number of N atoms in ancillary has no obvious effects on their photophys. properties. (Czppy)₂Ir(tfmptz) and (Czppy)₂Ir(pptz) display blue-green emission with peaks at 493 and 526 nm. The performance of (Czppy)₂Ir(tfmptz) in PhOLEDs is superior to that of (Czppy)₂Ir(pptz) due to poor thermal stability.

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 C11H15NOS, Product Details of C8H5F3N4.

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

Hsu, Fang-Chi published the artcileEn Route to the Formation of High-Efficiency, Osmium(II)-Based Phosphorescent Materials, HPLC of Formula: 219508-27-7, the publication is Inorganic Chemistry (2006), 45(25), 10188-10196, database is CAplus and MEDLINE.

Triosmium cluster complexes [Os₃(CO)₈(fppz)₂] (2a) and [Os₃(CO)₈(fptz)₂] (2b) bearing two 2-pyridyl azolate ligands were synthesized in an attempt to establish the reaction mechanism that gives rise to the blue-emitting phosphorescent complexes [Os(CO)₂(fppz)₂] (1a) and [Os(CO)₂(fptz)₂] (1b) [(fppz)H = 3-(trifluoromethyl)-5-(2-pyridyl)pyrazole; (fptz)H = 3-(trifluoromethyl)-5-(2-pyridyl)triazole]. X-ray structural anal. of 2b showed an open triangular metal framework incorporating multisite-coordinated 2-pyridyltriazolate ligands. Treatment of 2 with the resp. 2-pyridylazolate ligand gave blue-emitting complex 1b, confirming their intermediacy, while the reaction of 2b with phosphine ligand PPh₂Me afforded two hitherto novel isomeric hydride complexes 3 and 4 [Os(CO)(fptz)(PPh₂Me)₂(H)], for which the reversible interconversion was clearly established at higher temperatures (>180°). The single-crystal x-ray diffraction analyses of 3 and 4 confirmed their monometallic and isomeric nature, together with the coordination of two phosphine ligands located in the trans-disposition and one CO and one hydride located opposite to the pyridyl triazolate chelate. Subtle differences in photophys. properties were examined for isomers 3 and 4 from steady state absorption and emission, the relaxation dynamics, and temperature-dependent luminescent studies. The results, in combination with time-dependent d. function theory (TDDFT) calculations, provide fundamental insights into the future design and preparation of highly efficient 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 C8H5F3N4, HPLC of Formula: 219508-27-7.

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

Xu, Huixia published the artcileSynthesis and photoelectric performances of blue-green emitting iridium phenylpyridine complexes using N,N’-heteroaromatic ancillary ligands, Computed Properties of 219508-27-7, the publication is New Journal of Chemistry (2015), 39(7), 5293-5299, database is CAplus.

Four iridium complexes [(ppy)₂IrL] containing different ancillary ligands [HL = 2-(5-R-2H-1,2,4-triazol-3-yl)pyridine, where R = 4-CF₃C₆H₄ (Htfmpptz), 4-FC₆H₄ (Hfpptz), CF₃ (Htfmptz); Hppy = 2-phenylpyridine] were synthesized and characterized. Their mol. structures were identified by x-ray single crystal diffraction. The effects of ancillary ligands on the photophys. and luminescence behaviors were investigated. The emission maximum peaks of (ppy)₂Ir(tfmpptz), (ppy)₂Ir(fpptz) and (ppy)₂Ir(tfmptz) in CH₂Cl₂ solution appear at 485, 487 and 483 nm, resp. Phosphorescent organic light-emitting devices (PhOLEDs) were fabricated using these complexes doped in CBP as an emitting layer.

New Journal of 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 C7H8O3, Computed Properties of 219508-27-7.

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

Takizawa, Shin-Ya published the artcilePhosphorescent iridium complexes based on 2-phenylimidazo[1,2-a]pyridine ligands: tuning of emission color toward the blue region and application to polymer light-emitting devices, Application of 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Inorganic Chemistry (2007), 46(10), 4308-4319, database is CAplus and MEDLINE.

New blue-phosphorescent Ir(III) complexes 1-14 with ligands of 2-phenylimidazo[1,2-a]pyridine (pip) derivatives were successfully prepared, and their electrochem., photophys. and electroluminescent (EL) properties were systematically studied. The emission maxima are significantly dependent on the substituents on the Ph ring at 489-550 nm. For instance, electron-withdrawing groups such as F and CF₃ shift the emission maxima to shorter wavelengths by lowering the HOMO levels (complexes 4-8), whereas the extended π-conjugation leads to bathochromic shifts (2-3). To obtain further information about the frontier orbital, substitution effects on the imidazole part were also studied here, and electron-withdrawing or -donating substituents on the imidazole ring affected the emission maxima (9, 557 nm; 10, 525 nm). These results including their oxidation potentials suggest that the HOMO of the pip-based complex is a mixture of Ir-d, phenyl-π, and imidazole-π orbitals. From this viewpoint, combination of electron-withdrawing substituents on the Ph ring using another ancillary ligand enabled further blue shifts (13, 468, 499 nm; 14, 464, 494 nm). This new system based on pip is one of the rare examples of Ir complexes whose emissions can be tuned to the blue region. Preliminary polymer light-emitting devices employing the Ir complexes were fabricated, and the devices showed moderate EL efficiencies.

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 C10H14N2O, Application of 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

Tao, Peng published the artcileHighly efficient thienylquinoline-based phosphorescent iridium(III) complexes for red and white organic light-emitting diodes, Formula: C8H5F3N4, the publication is Organic Electronics (2017), 293-301, database is CAplus.

Highly efficient 2-(thiophen-2-yl)quinoline-based phosphorescent iridium(III) complexes bearing 2-(3-(trifluoromethyl)-1H-1,2,4-triazol-5-yl)pyridine or picolinic acid as ancillary ligands are designed and synthetised. The variation of ancillary ligands is attempted to finely tune the photophys. properties of these complexes, especially the solution phosphorescent quantum yields (Φ_PL), full width at half maximum (FWHM), etc. The picolinic acid-based complex displays the slightly red-shifted dual-peak emission compared to triazolpyridine-based one. The complexes show bright emission with broad FWHM up to 83 nm, and the emissions are in red region with the very high absolute Φ_PL up to 0.76 in solution Moreover, high-performance red and three-color-based white organic light-emitting diodes (OLEDs) with excellent color stability have been fabricated. The maximum external quantum efficiencies of red and white OLEDs can reach 16.2% and 15.1%, resp. The maximum current efficiency and power efficiency of white OLED are as high as 35.5 cd A^-1 and 34.0 lm W^-1, resp. Especially, the designed white OLED exhibits excellent spectral stability under wide operating voltage range, and the 1931 Commission Internationale de L’Eclairage of white OLED only changes from (0.43, 0.42) to (0.44, 0.44), the color rendering index is in a narrow range of 75-77.

Organic Electronics 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 C15H21BO3, Formula: C8H5F3N4.

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

Tong, Bi-hai published the artcileHigh-brightness solution-processed phosphorescent OLEDs with pyrimidine-based iridium(III) complexes, Category: triazoles, the publication is RSC Advances (2016), 6(41), 34970-34976, database is CAplus.

Two heteroleptic cyclometalated iridium(III) complexes, Ir(ppm)₂(pic) and Ir(ppm)₂(taz), using 4,6-di-Ph pyrimidine (Hppm) as a cyclometalating ligand, were successfully synthesized and characterized. Strong emission at 555 and 532 nm with high photoluminescence quantum yields of 83% and 86% in PMMA at 298 k were obtained for Ir(ppm)₂(pic) and Ir(ppm)₂(taz), resp. Solution-processed organic light-emitting diodes (OLEDs) based on Ir(ppm)₂(pic) and Ir(ppm)₂(taz) showed high-brightness of 112 233 and 125 072 cd m^-2, peak current efficiencies of 30.6 and 40.4 cd A^-1 and maximum external quantum efficiencies of 10.4 and 17.3%, resp., accompanied by very low efficiency roll-off values. The ancillary ligand taz tuned the emission to saturated green, and more importantly, it can significantly increase the spectral stability and device efficiency.

RSC Advances 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 C10H16O2, Category: triazoles.

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

Li, Hongxin published the artcileSolution-processable high-efficiency bis(trifluoromethyl)phenyl functionalized phosphorescent neutral iridium(III) complex for greenish yellow electroluminescence, Safety of 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Tetrahedron Letters (2018), 59(18), 1748-1751, database is CAplus.

A novel and highly efficient bis(trifluoromethyl)phenyl functionalized iridium(III) complex is designed and synthesized. The complex shows intensive greenish yellow phosphorescence (525 nm with 563 nm as shoulder), high photoluminescence efficiency (0.90) and moderate full width at half maximum (72 nm). The bulky bis(trifluoromethyl)phenyl moiety introduced into the complex provides the excellent solubility and effective steric hindrance for solution-processed organic light-emitting diodes. The maximum power efficiency and current efficiency of electroluminescence are 4.13 lm/W and 9.54 cd/A, resp.

Tetrahedron Letters 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, Safety of 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

Liu, Yuqi published the artcileDFT/TDDFT investigation on the electronic structures and photophysical properties of phosphorescent Ir(III) complexes with conjugated/non-conjugated carbene ligands, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2013), 1(23), 3700-3709, database is CAplus.

A DFT/TDDFT study was performed on the electronic structures, basic photophys. properties and potential OLED applications of Ir(III) complexes [(fpmb)₂Ir(fptz)] (1a), [(dfpmb)₂Ir(fptz)] (2a), [(fpmb)₂Ir(bptz)] (3a), [(dfpmb)₂Ir(bptz)] (4a) [where H₂fpmb = 1-(4-fluorophenyl)-2,3-dihydro-3-methyl-1H-benzo[d]imidazole; H₂dfpmb = 1-(2,4-fluorophenyl)-2,3-dihydro-3-methyl-1H-benzo[d]imidazole; fptzH = 2-(5-(trifluoromethyl)-2H-1,2,4-triazol-3-yl)pyridine; bptzH = 4-tert-butyl-2-(5-(trifluoromethyl)-2H-1,2,4-triazol-3-yl)pyridine] and [(fbmb)₂Ir(fptz)] (1b), [(dfbmb)₂Ir(fptz)] (2b), [(fbmb)₂Ir(bptz)] (3b), [(dfbmb)₂Ir(bptz)] (4b) [where H₂fbmb = 1-(4-fluorobenzyl)-2,3-dihydro-3-methyl-1H-benzo[d]imidazole; H₂dfbmb = 1-(2,4-fluorobenzyl)-2,3-dihydro-3-methyl-1H-benzo[d]imidazole] bearing two conjugated and non-conjugated carbene ligands, resp., and one blue-emitting chromophore that possesses a much larger ligand energy gap. The photophys. properties of these complexes are greatly affected by the properties of the adopted ligands. From 1b to 4b, the insertion of a saturated σ-bond methylene spacer into the carbene ligand renders an increase of the HOMO-LUMO energy gap, but relatively weak absorption intensities. The emission spectra are slightly influenced by the switch between conjugated and non-conjugated ligands. Also, from the calculations, the significantly higher quantum yield of 2b and 3b with respect to 3a is also explained with the assistance of their larger metal contribution to the lowest excited states (MLCT%) and smaller S₁-T₂ splitting energies (ΔE_S1-T2). Besides, the designed complexes 1b and 4b are considered to be potential candidates as blue-emitting materials with good charge transfer properties and high quantum efficiency.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices 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

Xu, Huixia published the artcileSolution-processed blue and blue-green phosphorescent organic light-emitting devices using iridium(III) complexes based on 9-(6-(4-phenyl-1H-1,2,3-triazol-1-yl)hexyl)-9H-carbazole ligand, Formula: C8H5F3N4, the publication is Dyes and Pigments (2016), 148-154, database is CAplus.

We have designed and successfully synthesized a series of solution-processed iridium(III) complexes of (Czphtz)₂Ir(NN) bearing main ligand of 9-(6-(4-phenyl-1H-1,2,3 -triazol-1-yl)hexyl)-9H-carbazole, namely (Czphtz)₂Ir(tfmptz) (Ir1) (Czphtz)₂Ir(pptz) (Ir2) and (Czphtz)₂Ir(fpptz) (Ir3). The hole-transporting carbazole and electron-transporting 1, 2, 4-trizole moieties were introduced through hexyl to balance carrier transport. The solution-processed host-free and doped phosphorescent organic light-emitting devices (PhOLEDs) were fabricated. Here, in this paper, we will present the photophys., electrochem. properties and performances in devices of three complexes. All of them exhibit excellent solubilities in common organic solvents. The pure-blue-light-emitting Ir1 with the maximum emission peak at 463 nm was attained by varying the structure of ancillary ligand and have the CIE coordinate of (0.19, 0.18) in host-free PhOLED. Our work shows that the rational structure modification of ancillary ligand is an effective approach to develop deep blue-light-emitting materials.

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 C12H17NO2, Formula: C8H5F3N4.

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