Category: 219508-27-7

Zhao, Kai-Yue published the artcileTuning Emission of AIE-Active Organometallic Ir(III) Complexes by Simple Modulation of Strength of Donor/Acceptor on Ancillary Ligands, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Organometallics (2016), 35(23), 3996-4001, database is CAplus.

A new design strategy to tune emission color of aggregation-induced emission (AIE) Ir(III) complexes, by simply adjusting the strength of donor/acceptor on ancillary ligands, is reported. Herein, all studied Ir(III) complexes employ 1-(2,4-difluorophenyl)-1H-pyrazole as cyclometalated ligands but different pyridine-1,2,4-triazolyl moieties as ancillary ligands that were modified with carbazole end-capped alkyl groups, in which pyridine-1,2,4-triazolyl moieties and functionalized carbazole act as donor and acceptor units, resp. The exptl. and theor. results clearly reveal the intrinsic relation between structures and emission behaviors. Enhancing the ability of donor and/or acceptor leads to red shifted emission and vice versa. One of the designed dyes exhibits the reversible and significant mechanochromic luminescent behavior thanks to its efficient AIE characteristic and structural modification, providing a feasible way to design multifunctional materials.

Organometallics 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 C15H12O6, 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

Topchiy, Maxim A. published the artcileDeep blue luminescent cyclometallated 1,2,3-triazol-5-ylidene iridium(III) complexes, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Mendeleev Communications (2020), 30(6), 717-718, database is CAplus.

Novel heteroleptic cyclometallated 1,2,3-triazol-5-ylidene Ir^III complexes with 2-(5-trifluoromethyl-2H-1,2,4-triazol-3-yl)pyridine or 2-(1H-tetrazol-5-yl)pyridine as the ancillary ligands demonstrate photoluminescence in green (520 nm) and blue (450-480 nm) regions.

Mendeleev Communications 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 C9H9BO2, 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

Chan, Khai Leok published the artcileSynthesis of triplet emitters and hosts for electrophosphorescence, Related Products of triazoles, the publication is Proceedings of SPIE-The International Society for Optical Engineering (2005), 59370B/1-59370B/9, database is CAplus.

Iridium cyclometalated phenylpyridine-triazolylpyridine complexes were prepared as additives to dye-doped phosphorescent polymer systems for harnessing both singlet and triplet excitons to improve electroluminescence. Reaction of di-μ-chlorotetrakis[3,5-difluoro-2-(4-R-5-X-2-pyridinyl-κN)phenyl-κC]diiridium, [Ir₂(μ-Cl)₂(L-C,N)₄] with 5-(2-pyridinyl)-3-trifluoromethyl-1H-1,2,4-triazole (HL¹) gave complexes [Ir(L¹-N¹,N’)(L-C,N)₂] (8a–b; a X = R = H; b X = Br, R = H; c X = H, R = C₈H₁₇; d X = 3-carbazolyl, R = H). Complexes 8a–d exhibit room-temperature photoluminescence in 450-700 nm region. Electroluminescence from conjugated polymers can be significantly improved by harnessing the energy of their non-emissive triplet states. Poly(2,7-dibenzosilole) was prepared and its triplet energy has been measured as 2.14 eV, a figure that is slightly higher than that of polyfluorene (2.09 eV).

Proceedings of SPIE-The International Society for Optical Engineering 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, Related Products of triazoles.

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

He, Li-Hua published the artcileLuminescent Three- and Four-Coordinate Dinuclear Copper(I) Complexes Triply Bridged by Bis(diphenylphosphino)methane and Functionalized 3-(2′-Pyridyl)-1,2,4-triazole Ligands, SDS of cas: 219508-27-7, the publication is Inorganic Chemistry (2017), 56(17), 10311-10324, database is CAplus and MEDLINE.

A new series of bimetallic Cu(I) complexes 1–5 triply bridged by a monoanionic or charge-neutral functionalized 3-(2′-pyridyl)-1,2,4-triazole in a μ-η¹(N),η²(N,N) tridentate binding mode and two bis(diphenylphosphino)methane (dppm) ligands have been synthesized. Complexes 1–5 are singly or doubly charged dinuclear Cu(I) species with an eight-membered Cu₂C₂P₄ ring of {Cu(μ-dppm)₂Cu} unit, in which 3 and 4 adopt the boat-boat conformation, while 1, 2, and 5 display the chair-boat form. In these dimeric copper(I) complex cations, one of the two Cu(I) ions is four-coordinated, in a highly distorted N₂P₂ tetrahedral environment and the other is three-coordinated, in a distorted NP₂ trigonal planar arrangement. All these Cu(I) complexes exhibit a comparatively weak low-energy absorption in CH₂Cl₂ solution, ascribed to the charge-transfer transitions with appreciable ¹MLCT contribution, as suggested by time-dependent d. functional theory (TDDFT) analyses. Complexes 1–5 display good emission properties in both solution and solid states at ambient temperature, which are well-modulated via structural modification of 3-(2′-pyridyl)-1,2,4-triazole, including the alteration of the substituent type (-CF₃, -H, -CH₃, and -C(CH₃)₃) and position (ortho-, meta-, and para-position). Furthermore, the variation of the substituent (-CF₃ and -C(CH₃)₃) on the 5-site of the 1,2,4-triazolyl ring markedly influences the proton activity of the 1,2,4-triazolyl-NH, thus giving both singly and doubly charged bimetallic Cu(I) species regulated by the NH↔N^– conversion, resulting from NH deprotonation of the 1,2,4-triazolyl ring.

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, SDS of cas: 219508-27-7.

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

Li, Yong-Hui published the artcileOsmium(II) complexes for light-driven aerobic oxidation of amines to imines, COA of Formula: C8H5F3N4, the publication is Dalton Transactions (2016), 45(31), 12400-12408, database is CAplus and MEDLINE.

The synthesis and characterization of three Os(II) complexes [Os(fptz)₂(L¹)] (fptzH = 3-trifluoromethyl-5-pyridyl-1,2,4-triazole), I (L¹ = PPhMe₂, PPh₃, pyridine; L² = PPhMe₂, CO) that were successfully utilized as good photocatalysts to promote aerobic oxidative coupling of amines to imines with mol. oxygen in air as a green oxidant was described. Complex I (L¹ = L² = PPhMe₂) was the most effective catalyst for the oxidative coupling of benzylamine with mol. O₂ (air) as the oxidant because of the complex’s strong absorption of visible light and long-lived triplet state. The application of a low catalyst loading (0.06 mol%) of complex I (L¹ = L² = PPhMe₂) to the oxidative coupling of a wide range of amines afforded the corresponding imines efficiently and selectively in most cases. The reaction mechanism was investigated via relevant control and quenching experiments The results indicated that the reaction occurs via an active ¹O₂-involved pathway. The ¹O₂-generating ability of complex I (L¹ = L² = PPhMe₂) as a photosensitizer was evaluated using 9,10-dimethylanthracene (DMA) as a chem. trap for ¹O₂.

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 C8H5F3N4, COA of Formula: C8H5F3N4.

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

Ma, Haiyang published the artcileSky-blue iridium complexes with pyrimidine ligands for highly efficient phosphorescent organic light-emitting diodes, Product Details of C8H5F3N4, the publication is New Journal of Chemistry (2020), 44(21), 8743-8750, database is CAplus.

Blue iridium phosphors are always precious and desirable for both fundamental research and industrial applications in organic light-emitting diodes (OLEDs). Three heteroleptic cyclometalated iridium(III) complexes,I,II, III (Ir1, Ir2 and Ir3,resp. ) incorporating 2-(3,5-bis(trifluoromethyl)phenyl)-pyrimidine (tfmphpm) or 2-(2,4-difluorophenyl)-pyrimidine (dfppm) as the main ligand, and 2-(3-(trifluoromethyl)-1H-pyrazol-5-yl)pyridine (fppz) or 2-(5-(4-(trifluoromethyl)phenyl)-2H-1,2,4-triazol-3-yl)pyridine (Htaz) as the ancillary ligand, were developed for application in OLEDs. Owing to the introduction of the strong-field CF₃-containing ancillary ligand and the incorporation of electron-withdrawing F or CF₃ groups on the HOMO-lying C-related aromatic rings of the CN̂ cyclometalating ligands, the phosphorescence of these Ir(III) complexes peaked at 457-459 nm. In comparison with the well-known com. sky-blue iridium complex FIrpic (bis(4′,6′-difluorophenylpyridinato) iridium(III) picolinate, 475 nm), the phosphorescence of these complexes is hypsochromically shifted by 16-18 nm, more closely approaching standard blue light. They have high phosphorescence quantum yields in solution The phosphorescent OLEDs employing these complexes as doped emitters display impressive performance. In particular, the PhOLED based on Ir3 achieves an outstanding maximum external quantum efficiency of 21.23% with Commission Internationale de l′Eclairage (CIE) coordinates of (0.15, 0.26), which is about 27% higher than that of the control device using FIrpic as a dopant (16.63%).

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 C8H5F3N4, Product Details of C8H5F3N4.

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

Cheng, Yi-Ming published the artcileRational design of chelating phosphine functionalized Os^(II) emitters and fabrication of orange polymer light-emitting diodes using solution process, Application In Synthesis of 219508-27-7, the publication is Advanced Functional Materials (2008), 18(2), 183-194, database is CAplus.

A new series of charge neutral Os^II pyridyl azolate complexes with either bis(diphenylphosphino)methane (dppm) or cis-1,2-bis(diphenylphosphino)ethene (dppee) chelates were synthesized, and their structural, electrochem., photophys. properties and thermodn. relationship were established. For the dppm derivatives , the pyridyl azolate chromophores adopt an eclipse orientation with both azolate segments aligned trans to each other, and with the pyridyl groups resided the sites that are opposite to the phosphorus atoms. In sharp contrast, the reactions with dppee ligand gave rise to the formation of two structural isomers for all three kind of azole chromophores, with both azolate or neutral heterocycles (i.e., pyridyl or isoquinolinyl fragments) located at the mutual trans-disposition around the Os metal (denoted as series of a and b complexes). These chelating phosphines Os^(II) complexes show remarkably high thermal stability, among which and several exhibit nearly unitary phosphorescence yield in deaerated solution at RT. A polymer light-emitting device (PLED) prepared using 0.4 mol % of I as dopant in a blend of poly(vinylcarbazole) (PVK) and 30 wt % of 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole (PBD) exhibits yellow emission with brightness of 7208 cd m^-2, an external quantum efficiency of 10.4 % and luminous efficiency of 36.1 cd A^-1 at c.d. of 20 mA cm^-2. Upon changing to 1.6 mol % of II, the result showed even better brightness of 9212 cd m^-2, external quantum efficiency of 12.5 % and luminous efficiency of 46.1 cd A^-1 at 20 mA cm^-2, while the maximum external quantum efficiency of both devices reaches as high as 11.7 % and 13.3 %, resp. The high PL quantum efficiency, non-ionic nature, and short radiative lifetime are believed to be the determining factors for this unprecedented achievement.

Advanced Functional Materials 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, Application In Synthesis of 219508-27-7.

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

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

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