Tag: M.W=200-250

Wang, Yue published the artcileNovel phosphorescent triptycene-based Ir(III) complexes for organic light-emitting diodes, Quality Control of 219508-27-7, the publication is Dalton Transactions (2019), 48(43), 16289-16297, database is CAplus and MEDLINE.

A series of charge-neutral cyclometalated iridium(III) complexes (1-3 and 5-7) containing triptycene-substituted ligands (tbt and tpbi) and two parent complexes (4 and 8) were synthesized and characterized. The crystal structures indicated that π-π stacking interactions existed in ligand tbtH, but not in complex 6. However, a large intramol. repulsion was found in complex 6. These triptycene-based complexes exhibited good thermal stability, which was higher compared with that of the parent complexes. These complexes showed green to yellow emission with peaks that ranged from 503 to 563 nm. The introduction of the rigid non-conjugate triptycene skeleton caused a slight emission red shift (<25 nm), but a significant increase in the PLQYs (>47%) was observed The electroluminescent devices employing 2 and 6 as phosphors displayed impressive performance improvements and low efficiency roll-off because of the higher PLQYs and HOMO levels of these triptycene-based complexes. The maximum current and external quantum efficiencies of the devices based on complexes 2 and 6 were 41.7 cd A^-1, 11.9% and 41.2 cd A^-1, 12.6%, resp., which were about 31% higher than that of the devices based on the parent complexes 4 and 8. This work provides a novel approach to develop highly efficient phosphors with a triptycene skeleton.

Dalton Transactions 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 C4Br2N2O4S, Quality Control of 219508-27-7.

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

Xu, Huixia published the artcileSynthesis and characterization of blue-to-green electrophosphorescence emitter based on pyrazole iridium complexes, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Dyes and Pigments (2013), 99(1), 67-73, database is CAplus.

To overcome the roll-off efficiency of electrophosphorescent organic light-emitting devices, Ir(III) complexes of (ppz)₂Ir(NN) were synthesized and named for (ppz)₂Ir(tfmpptz), (ppz)₂Ir(fpptz), (ppz)₂Ir(tfmptz) and (ppz)₂Ir(pybi) (ppz: 1-phenylpyrazolato; NN: N, N’-heteroaromatic). Their mol. structures, photophys. properties and cyclic voltammetric data were reported. The crystals of (ppz)₂Ir(tfmpptz), (ppz)₂Ir(fpptz) are monoclinic, space group P2(1)/n, and (ppz)₂Ir(tfmptz) is triclinic, space group P-1. The emission maximum peaks of (ppz)₂Ir(tfmpptz), (ppz)₂Ir(fpptz), (ppz)₂Ir(tfmptz) and (ppz)₂Ir(pybi) at room temperature appear at 486, 497, 473 and 530 nm, resp. The devices with architecture of ITO/NPB (30 nm)/CBP: (ppz)₂Ir(NN) (6%, 30 nm)/BAlq(10 nm)/Alq₃(30 nm)/LiF(1 nm)/Al (100 nm) were fabricated by thermal evaporation The larger steric hindrance of ancillary ligands efficiently suppressed the roll-off of efficiency at high c.d.

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 C33H29N3O3, 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

Hu, Fa-Chun published the artcileDesign of Os^II-based Sensitizers for Dye-Sensitized Solar Cells: Influence of Heterocyclic Ancillaries, COA of Formula: C8H5F3N4, the publication is ChemSusChem (2013), 6(8), 1366-1375, database is CAplus and MEDLINE.

A series of Os^II sensitizers (TFOS-x, in which x = 1, 2, or 3) with a single 4,4′-dicarboxy-2,2′-dipyridine (H₂dcbpy) anchor and two chelating 2-pyridyl (or 2-pyrimidyl) triazolate ancillaries was successfully prepared Single-crystal X-ray structural anal. showed that the core geometry of the Os^II-based sensitizers consisted of one H₂dcbpy unit and two eclipsed cis-triazolate fragments; this was notably different from the Ru^II-based counterparts, in which the azolate (both pyrazolate and triazolate) fragments are located at the mutual trans-positions. The basic properties were extensively probed by using spectroscopic and electrochem. methods as well as time-dependent d. functional theory (TD-DFT) calculations Fabrication of dye-sensitized solar cells (DSCs) was then attempted by using the I^–/I₃^–-based electrolyte solution One such DSC device, which utilized TFOS-2 as the sensitizer, showed promising performance characteristics with a short-circuit c.d. (J_SC) of 15.7 mA cm^-2, an open-circuit voltage of 610 mV, a fill factor of 0.63, and a power conversion efficiency of 6.08 % under AM 1.5G simulated one-sun irradiation Importantly, adequate incident photon-to-current conversion efficiency performances were observed for all TFOS derivatives over the wide spectral region of 450-950 nm, showing a panchromatic light harvesting capability that extended into the near-IR regime. The results underlined a feasible strategy for maximizing J_SC and increasing the efficiency of DSCs.

ChemSusChem 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, COA of Formula: C8H5F3N4.

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

Cheng, Wei published the artcileBlue iridium(III) complexes with high internal quantum efficiency based on 4-(pyridin-3-yl)pyrimidine derivative and their electroluminescent properties, Name: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Dyes and Pigments (2020), 108257, database is CAplus.

Three novel highly efficient blue bicyclometalated Ir(III) complexes (Ir1-Ir3) were designed and synthesized with 4-(2,6-difluoropyridin-3-yl)-6-mesitylpyrimidine as primary ligands. The alternation of ancillary ligands had precisely regulated their emitting peaks from sky-blue to deep-blue. These complexes exhibit unimodal emission with PLQYs >90% and lifetimes shorter than 1.1μs. These complexes also show good thermal stability with T_d > 320°. The OLED using complex Ir3 as emitter in 13% exhibited a maximum luminous efficiency of 16.9 cd A^-1 with a high EQE of 13.0%. The CIE coordinates of this device are (0.15, 0.16), which are close to the standard blue color region.

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, Name: 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

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

Sun, Jing published the artcileSynthesis, structure, photophysical and electroluminescent properties of a blue-green self-host phosphorescent iridium(III) complex, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Materials Chemistry and Physics (2015), 392-399, database is CAplus.

A kind of blue-green self-host phosphorescent Ir(III) complex, (CzPhBI)₂Ir(tfmptz) [CzPhBI = 9-(6-(2-phenyl-1-benzimidazolyl)hexyl)-9-carbazole; tfmptz = 2-(5-trifluoromethyl-1,2,4-triazolyl)pyridine], was designed and synthesized. The synthesized Ir(III) complex was characterized by ¹H NMR, ¹⁹F NMR, FTIR, elemental anal. and x-ray single-crystal diffraction, resp. Its thermal properties, optical properties and electrochem. properties were also studied. The host-free organic electroluminescent devices with the configuration of ITO/MoO₃ (3 nm)/NPB (30 nm)/TAPC (15 nm)/(CzPhBI)₂Ir(tfmptz) (30 nm)/TBPI (30 nm)/LiF (1 nm)/Al (100 nm) had been fabricated. The devices exhibited excellent performance indicating that (CzPhBI)₂Ir(tfmptz) was a promising phosphorescent material.

Materials Chemistry and Physics 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 C6H5F4NO3S, 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

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 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