Tag: M.W=250-300

Shan, Guo-Gang published the artcileEnhancing the luminescence properties and stability of cationic iridium(III) complexes based on phenylbenzoimidazole ligand: a combined experimental and theoretical study, Related Products of imidazoles-derivatives, the publication is Dalton Transactions (2013), 42(31), 11056-11065, database is CAplus and MEDLINE.

Herein we designed and synthesized a series of cationic iridium(III) complexes with a phenylbenzimidazole-based cyclometalated ligands, containing different numbers of carbazole moieties from zero to three. Complexes [Ir(Phbi)₂(PyPhbi)][PF₆] (1, H-Phbi = 1,2-diphenylbenzimidazole, PyPhbi = 3-phenyl-2-(2-pyridyl)benzimidazole) [Ir(Phbi)₂(PyCbzbi)][PF₆] [2, PyCbzbi = 1-(4-(9-carbazolyl)phenyl)-2-(2-pyridyl)benzimidazole], [Ir(Cbzbi)₂(PyPhbi)][PF₆] [3, H-Cbzbi = 1-(4-(9-carbazolyl)phenyl)-2-phenylbenzimidazole] and [Ir(Cbzbi)₂(PyCbzbi)][PF₆] (4) were prepared by reacting the corresponding chloro-bridged dimers [Ir₂(Phbi)₄(μ-Cl)₂] and [Ir₂(Cbzbi)₄(μ-Cl)₂] with pyridylbenzimidazoles PyPhbi and PyCbzbi. The photophys. and electrochem. properties of this series have been systematically investigated. The complexes exhibit strong luminescence in both solution and in neat films, as well as excellent redox reversibility. Introducing carbazole groups into the complexes is found to lead to substantially enhanced photoluminescence quantum efficiency in the neat film, but has little effect on the emitting color and excited-state characteristics as supported by d. functional theory (DFT) results. DFT calculations also suggest that functionalized complexes 2–4 reveal better hole-transporting properties than 1. More importantly, all complexes effectively reduce the degradation reaction to some extent in metal-centered (³MC) excited-states, demonstrating their stability. Further studies indicate that restriction of opening of the structures in the ³MC state is caused by the unique mol. conformation of the phenylbenzimidazole ligand, which is first demonstrated here in cationic iridium(iii) complexes without intramol. π-π stacking. These results presented here would provide valuable information for designing and synthesizing highly efficient and stable cationic iridium(III) complexes suitable for the optical devices.

Dalton Transactions published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C4H6BrFO2, Related Products of imidazoles-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Li, Hui published the artcileDesign, synthesis, and optoelectronic properties of dendrimeric Pt(II) complexes and their ability to inhibit intermolecular interaction, Quality Control of 2622-67-5, the publication is Inorganic Chemistry (2014), 53(2), 810-821, database is CAplus and MEDLINE.

Dendrimeric Pt-(II) complexes [(CN̂)-Pt(dpm)] and [Pt(CN̂)₂] (Hdpm = dipivaloylmethane, HCN̂ = 1,2-diphenylbenzoimidazole and its derivatives containing the carbazole dendrons) have been synthesized and characterized systematically. All of the complexes display green emission in the range of 495-535 nm that originated from the 360-440 nm absorption bands, which are assigned to dπ-(Pt)→π*-(L) metal-to-ligand charge transfer (MLCT) mixed with intraligand π-(L)→π*-(L) transition. Solution photoluminescence quantum yield (φ_p 0.26-0.31) of the heteroleptic complexes [(Cd^old^olandd^old^olN)-Pt-(dpm)] obviously increases when compared with that of complex [(Cd^old^olandd^old^olN)-Pt-(acac)]. Organic light-emitting diode devices based on these Pt-(II) complexes with a multilayer configuration were fabricated and gave desirable electroluminescent (EL) performances, such as non- or less red-shifted EL spectra, in comparison with the photoluminescence spectra and slow efficiency roll-off with increasing brightness or c.d. Complex [(t-BuCzCzPBI)-Pt-(dpm)] (where t-BuCzCzPBI = 1-(4-(3,6-di-(3,6-di-t-butyl-carbazol-9-yl))-carbazol-9-yl)-phenyl-2-phenylbenzoimidazole) showed the best performance, with a maximum current efficiency of 29.31 cd/A and a maximum external quantum efficiency (EQE) of 9.04% among the fabricated devices. Likewise, for homoleptic [Pt-(t-BuCzCzPBI)₂] dendrimer, the powder φ_p (0.14) and maximum EQE (0.74%) improve by 7 and 7.4 times, resp., as high as they do for nondendrimeric [Pt-(1,2-diphenylbenzoimidazole)₂] (0.02, 0.10%), although its efficiency is still lower than that of the heteroleptic counterpart due to the severely distorted square-planar geometry of the emitting core. These results reveal that large steric hindrance from ancillary ligand (dpm) or the homoleptic conformation can effectively inhibit intermol. interaction for these dendrimeric Pt-(II) complexes.

Inorganic Chemistry published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, Quality Control of 2622-67-5.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Jiao, Yan published the artcileA facile color-tuning strategy for constructing a library of Ir(III) complexes with fine-tuned phosphorescence from bluish green to red using a synergetic substituent effect of -OCH₃ and -CN at only the C-ring of CN̂ ligand, Safety of 1,2-Diphenyl-1H-benzo[d]imidazole, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2016), 4(19), 4269-4277, database is CAplus.

By simply grafting a -CN group and/or a -OCH₃ group onto the meta- and/or para-site of the C-ring, a series of Ir(III) complexes bearing a similar mol. platform of bis(1,2-diphenyl-1H-benzimidazolato-N,C^2′)iridium(III)(acetylacetonate), but showing fine-tuned phosphorescence covering nearly the whole window of the visible spectrum with a wide color-tuning range of 109 nm was acquired. With the help of DFT calculations, it was revealed that if the C-related arene moiety of the CN̂ ligand (C-ring) contributes substantially to both the HOMO and LUMO of an Ir(III) complex, the concurrent introduction of an electron-donating -OCH₃ and an electron-withdrawing -CN groups on the C-ring at the meta- and para-sites relative to the Ir atom may lead to a favorable synergetic substituent effect on the color-tuning direction. This may represent a facile yet effective mol. design strategy for Ir(III) complexes with a desirous emission color. A bluish green organic light-emitting diode (OLED) based on one of the objective complexes displayed a maximum current efficiency of 62.1 cd A^-1, an external quantum efficiency of 19.8%, and a brightness of 48 040 cd m^-2, implying that high-performance red and blue OLED phosphors as well as libraries of Ir(III) complexes bearing similar mol. platforms may be developed through this -OCH₃ and -CN synergetic substitution strategy.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, Safety of 1,2-Diphenyl-1H-benzo[d]imidazole.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Chopra, Radhika published the artcileDevelopment of a supramolecular ensemble of an AIEE active hexaphenylbenzene derivative and Ag@Cu₂O core-shell NPs: an efficient photocatalytic system for C-H activation, Formula: C19H14N2, the publication is Chemical Communications (Cambridge, United Kingdom) (2016), 52(66), 10179-10182, database is CAplus and MEDLINE.

A supramol. ensemble having Ag@Cu₂O core-shell nanoparticles stabilized by aggregates of a hexaphenylbenzene derivative has been developed which exhibits excellent photocatalytic efficiency in reactions involving preparation of imidazole and benzimidazole derivatives via C-H activation.

Chemical Communications (Cambridge, United Kingdom) published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, Formula: C19H14N2.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Nguyen, Khac Minh Huy published the artcileCatalytic Oxidative Coupling of Primary Amines under Air: A Flexible Route to Benzimidazole Derivatives, Product Details of C19H14N2, the publication is European Journal of Organic Chemistry (2016), 2016(5), 1025-1032, database is CAplus.

Benzimidazoles are of fundamental importance in chem. and biol., and the development of efficient, environmentally benign methods for their preparation remains a key challenge for organic chemists. In a biomimetic approach inspired by copper amine oxidases, we disclose herein the scope and factors influencing the success of the cooperative action of CuBr₂ as electron-transfer mediator and a topaquinone-like substrate-selective catalyst in the oxidative cyclocondensation of primary amines with o-aminoanilines. This one-pot atom-economic multistep process, which works under green conditions with ambient air as the terminal oxidant, low loadings of catalyst, and equimolar amounts of com. available amine substrates, is particularly suitable for the preparation of 1,2-disubstituted benzimidazoles, e. g., I. Furthermore, it allows the functionalization of nonactivated primary aliphatic amines, which are known to be challenging substrates for non-enzymic catalytic aerobic systems.

European Journal of Organic Chemistry published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, Product Details of C19H14N2.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Nguyen, Khac Minh Huy published the artcileA Bioinspired Catalytic Aerobic Oxidative C-H Functionalization of Primary Aliphatic Amines: Synthesis of 1,2-Disubstituted Benzimidazoles, Safety of 1,2-Diphenyl-1H-benzo[d]imidazole, the publication is Chemistry – A European Journal (2015), 21(36), 12606-12610, database is CAplus and MEDLINE.

Aerobic oxidative C-H functionalization of primary amines has been accomplished with a biomimetic cooperative catalytic system to furnish 1,2-disubstituted benzimidazoles I [R¹ = Me, C₆H₅, 4-ClC₆H₄; R² = cyclopropyl, n-pentyl, Ph, etc.] under ambient air. This one-pot protocol has many advantages like mild reaction conditions, low catalyst loading, atom-economical process, simple work-up and convenient strategy to functionalize non-activated primary amines also.

Chemistry – A European Journal published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, Safety of 1,2-Diphenyl-1H-benzo[d]imidazole.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Kwon, Dong Yuel published the artcileTheoretical study of imidazole derivatives for blue thermally activated delayed fluorescence emitter, HPLC of Formula: 2622-67-5, the publication is Journal of Nanoscience and Nanotechnology (2016), 16(10), 11014-11017, database is CAplus.

Four novel thermally activated delayed fluorescence (TADF) materials with phenoxazine (PXZ) and 9,10-dihydro-9,9-dimethylacridine (ACR) as electron donors and 1,2-diphenyl-1H-phenanthro[9,10- d]imidazole (PI), and 1,2-diphenyH H-benzo[d]imidazole (Bl) as electron acceptors (PXZ-PI, ACR- Pl, PXZ-BI, ACR-BI) were designed and theor. investigated for blue OLED emitter. Using DFT and TDDFT calculations, we gained the electron distribution of HOMO and LUMO and the energy of the lowest singlet (S1) and the lowest triplet (T1) excited states. All of the materials have a small spatial overlap between HOMO and ã-UMÖ because of the relatively large dihedral angle between the Ph ring and the acceptor moiety. In terms of the energy difference (ΔEST) between the (S1) state and the T1, state, PXZ-PI, PXZ-BI, and ACR-BI showed the small ΔEST. However, ACR-PI showed the large ΔEST. Among the TADF materials, we showed that ACR-BI would have the best TADF properties in terms of small ΔEST and blue LED emitters.

Journal of Nanoscience and Nanotechnology published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, HPLC of Formula: 2622-67-5.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Gan, Haifeng published the artcileFe/S-Catalyzed Redox Condensation of o-Nitrophenols/thiophenols/anilines with Dibenzyl Disulfide: Access to 2-Arylbenzazoles, Quality Control of 2622-67-5, the publication is ChemistrySelect (2020), 5(2), 717-721, database is CAplus.

An Fe/S-catalyzed approach to 2-arylbenzazoles I (R¹ = H, 4-CH₃, 4-OCH₃, 4-F, 4-Cl, 4-C(CH₃)₃; R² = 5-CH₃, 6-Br, 5-C(O)₂CH₃, etc.; X = O, NH, NCH₃, NC₆H₅, NCH₂C₆H₅, S) and 2-phenyloxazolo[4,5-c]pyridine from dibenzyl disulfides (R¹C₆H₄CH₂S)₂ and o-nitrophenols 2-NO₂R²C₆H₃OH/thiophenols R¹C₆H₄CH₂SH/anilines 2-NO₂R²C₆H₃NHR³ (R³ = H, Me, Ph, Bn) in the presence of base NMP has been developed. The reactions proceeded in moderate to excellent yields with good functional tolerance and gram-scale application. Mechanistic research indicated that Fe/S clusters play an important role in the formation of products and DMSO is also important to oxidize benzyl mercaptans to give dibenzyl disulfides.

ChemistrySelect published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, Quality Control of 2622-67-5.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Han, Liangliang published the artcileEfficiency phosphorescent OLEDs with a low roll-off based on a hetero-triplet iridium complex, Safety of 1,2-Diphenyl-1H-benzo[d]imidazole, the publication is Dyes and Pigments (2015), 649-654, database is CAplus.

To explore the triplet-triplet annihilation in cyclometalated Ir complexes, a hetero-triplet Ir complex [Ir(ppy)₂pbi] employing 2 2-phenylpyridine (Hppy) ligands and one 1,2-diphenyl-1H-benzo[d]imidazole (Hpbi) ligand with similar triplet energies was synthesized. A device based on Ir(ppy)₂pbi exhibited high current efficiency 26.7 cd/A at high doping concentration 12%. The current efficiency was still maintained at 25.8 cd/A when the c.d. was >253.2 mA/cm². The efficiency roll-off was only ∼3.4%, much lower than that of traditional cyclometalated Ir complexes. Probably the complicated energy level and unsym. ligand in Ir(ppy)₂pbi may help to suppress the triplet-triplet annihilation.

Dyes and Pigments published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, Safety of 1,2-Diphenyl-1H-benzo[d]imidazole.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem

Lin, Jian-Ping published the artcileSolvent/Oxidant-Switchable Synthesis of Multisubstituted Quinazolines and Benzimidazoles via Metal-Free Selective Oxidative Annulation of Arylamidines, SDS of cas: 2622-67-5, the publication is Organic Letters (2014), 16(11), 2822-2825, database is CAplus and MEDLINE.

A fast and simple divergent synthesis of multisubstituted quinazolines and benzimidazoles was developed from readily available amidines, via iodine(III)-promoted oxidative C(sp³)-C(sp²) and C(sp²)-N bond formation in nonpolar and polar solvents, resp. Further selective synthesis of quinazolines in polar solvent was realized by TEMPO-catalyzed sp³C-H/sp²C-H direct coupling of the amidine with K₂S₂O₈ as the oxidant. No metal, base, or other additives were needed.

Organic Letters published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, SDS of cas: 2622-67-5.

Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem