Tag: M.W=200-250

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

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

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