Tag: M.W=250-300

Zheng, Jianwei published the artcileNovel core-shell nanocomposite as an effective heterogeneous catalyst for the synthesis of benzimidazoles, SDS of cas: 2622-67-5, the publication is Nanotechnology (2021), 32(26), 265603, database is CAplus and MEDLINE.

An effective heterogeneous catalyst for the synthesis of benzimidazole by integrating acidic catalytic activity and promoted the aerobic oxidation and magnetic recyclability of core-shell nanocomposite Fe₃O₄@SiO₂@UiO-66 was designed. The Fe₃O₄@SiO₂ core was encapsulated by the in-situ-grown UiO-66 shell and the UiO-66 shell retains the porous structure and crystallinity of UiO-66 with abundant exposed Lewis acid sites. It showed high catalytic ability for the synthesis of various benzimidazoles through the acid-catalyzed condensation and aerobic oxidation with in-situ oxygen. The Fe₃O₄@SiO₂ core provided magnetic recyclability of Fe₃O₄@SiO₂@UiO-66 and maintains high catalytic ability and stability over six cycles.

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 C7H7IN2O, SDS of cas: 2622-67-5.

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

Ouyang, Xinhua published the artcileEnhanced efficiency in nondoped, blue organic light-emitting diodes utilizing simultaneously local exciton and two charge-transfer exciton from benzimidazole-based donor-acceptor molecules, COA of Formula: C19H14N2, the publication is Dyes and Pigments (2014), 39-49, database is CAplus.

The simultaneous utilization of all charge-transfer excitons and local excitons is the pathway to obtain the high efficiency fluorescent organic light-emitting diodes (FOLEDs). Here, a twisted intramol. charge transfer state (TICT-state), a planar intramol. charge transfer state (ICT-state), and a locally excited state (LE-state) are demonstrated to enhance the occurrence of singlet excitons in the fluorescent emitters, which are based on benzimidazole and triphenylamine donor-acceptor derivatives The synthesis, photophysics and electroluminescent (EL) performance are studied systematically. The fluorescence emitters (TPABBBI and TPABBI) with the special TICT and ICT characteristics realize the electron-hole (e-h) recombination via intramol. conversion from charge-transfer excitons to radiative singlet exciton. The devices based on them show high efficiency (5.1 cd/A, 5.77 lm/W, 5.66% of EQE_m for TPABBBI and 3.56 cd/A, 3.11 lm/W, 4.23% for TPABBI), low efficiency roll-off at high luminance and stable blue emission.

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, COA of Formula: C19H14N2.

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

An, Lianying published the artcileSyntheses of a green organic phosphorescence materials and studies on their photoluminescent properties, Recommanded Product: 1,2-Diphenyl-1H-benzo[d]imidazole, the publication is Advanced Materials Research (Durnten-Zurich, Switzerland) (2012), 455-456(Pt. 2), 880-883, database is CAplus.

By using the N-phenyl-o-nitroaniline and benzoyl chloride as initial raw materials, a green light-emitting material (pbi)₂Ir(acac)₂ (pbiH = 1,2-diphenylbenzimidazole) was produced via a new designed synthesis plan. The structure of the complex was characterized by IR, MS, and DTA. The optical Luminescence Properties of the complex was studied by fluorescence spectrometry anal. The m.p. of the product is 343° which showed that it had thermal stability. The fluorescence spectrometry anal. exptl. results show that the excitation and emission peaks of the organic Ir(III) complex were, resp., 470.6 nm and 526.21 nm which showed that it belongs to green high-brightness light-emitting materials. The oxidation of the intermediate products exposed in air which could cause the quality of product instability was avoided in the new, improved synthesis plan.

Advanced Materials Research (Durnten-Zurich, Switzerland) 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, Recommanded Product: 1,2-Diphenyl-1H-benzo[d]imidazole.

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

Hu, Zhiyuan published the artcileI₂-Mediated Intramolecular C-H Amidation for the Synthesis of N-Substituted Benzimidazoles, Application In Synthesis of 2622-67-5, the publication is Journal of Organic Chemistry (2017), 82(6), 3152-3158, database is CAplus and MEDLINE.

A practical intramol. C-H amidation methodol. has been developed using mol. iodine under basic conditions. The required imine substrates were readily obtained by condensation of simple o-phenylenediamine derivatives and aldehydes. The transition-metal-free cyclization reaction described here works well with crude imines and allows for the sequential synthesis of N-protected 2-substituted benzimidazoles without purification of the less stable condensation intermediates. This operationally simple synthetic approach is broadly applicable to a variety of aromatic, aliphatic, and cinnamic aldehydes to produce diverse 1,2-disubstituted benzimidazole derivatives in an efficient and scalable fashion.

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, Application In Synthesis of 2622-67-5.

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

Zeng, Hui published the artcileA highly selective sulfur-free iridium(III)-complex-based phosphorescent chemidosimeter for detection of mercury(II) ions, Related Products of imidazoles-derivatives, the publication is Dalton Transactions (2012), 41(16), 4878-4883, database is CAplus and MEDLINE.

A neutral phosphorescent coordination compound bearing a benzimidazole ligand, Ir(pbi)₂(acac) (Hpbi = 1,2-diphenyl-1H-benzo[d]imidazole; Hacac = acetylacetone), is the 1st example of a sulfur-free iridium complex for the detection of Hg²⁺ cations with high selectivity and sensitivity. IR(pbi)₂(acac) shows a multi-signaling response towards mercury(ii) ions through UV-visible absorption, phosphorescence and electrochem. measurements. Upon addition of Hg²⁺ ions, solutions of this complex change from yellow to colorless, which could be observed easily by the naked eye, while its phosphorescence turns from bright green (λ_PLmax = 520 nm) into faint sky blue (λ_PLmax = 476 nm), and the detection limit is 2.4 × 10^-7 mol L^-1. ¹H NMR spectroscopic titration as well as ESI-MS results indicate that the decomposition of Ir(pbi)₂(acac) in the presence of Hg²⁺ through rupture of Ir-O bonds is responsible for the significant variations in both optical and electrochem. signals.

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 C14H14, Related Products of imidazoles-derivatives.

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

Wen, Li-Li published the artcileSimple molecular structure design of iridium(III) complexes: Achieving highly efficient non-doped devices with low efficiency roll-off, SDS of cas: 2622-67-5, the publication is Organic Electronics (2016), 142-150, database is CAplus.

To construct efficient emitters suitable for non-doped devices and deeply understand the relationship between structures and performances, we designed and synthesized two heteroleptic iridium(III) complexes based on 1,2-diphenyl-1H-benzoimidazole (PBI) ligands whose substituents are varied simply from Me (complex 2) to tert-Bu groups (complex 3). The parent complex 1 with non-substituent on PBI ligand has also been presented for a better comparison. Their photophys., electrochem. and electroluminescent (EL) performances are investigated systematically. Despite their structural modification, all complexes exhibit almost identical emission and excited-state characters, which are rationalized by the quantum-chem. calculations However, the obvious differences on device performances are found. Non-doped device employing 3 as emitting layer displays the highest EL performance with maximum current efficiency (η_c,max) of 18.6 cd A^-1 and power efficiency (η_p,max) of 16.2 lm W^-1 accompanied by low efficiency roll-off values, which is much higher than those of complexes 1 and 2. The obtained results herein suggest that introduction of the simple substituent into PBI ligand is an effective and feasible approach to develop highly efficient non-doped phosphors.

Organic Electronics 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 C15H24BN3O2, SDS of cas: 2622-67-5.

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

Wen, Li-Li published the artcileLow efficiency roll-off and high performance OLEDs employing alkyl group modified iridium(III) complexes as emitters, Formula: C19H14N2, the publication is RSC Advances (2016), 6(112), 111556-111563, database is CAplus.

Significant efficiency roll-off of phosphorescent organic light-emitting diodes (PHOLEDs) is a long-standing issue that limits their wider application. To address this problem, four iridium(III) complexes modified by Me or tert-Bu groups were designed and synthesized, denoted as Me-Ir-PI, tBu-Ir-PI, Me-Ir-PB, and tBu-Ir-PB. Their photophys., electrochem., and electroluminescent properties were studied in detail. The electroluminescent performances of devices based on tBu-Ir-PI and tBu-Ir-PB were better than those based on Me-Ir-PI and Me-Ir-PB. The best performance was achieved by the doped device employing tBu-Ir-PI as the emitter with maximum current efficiency of 42.0 cd A^-1 and maximum power efficiency of 27.0 lm W^-1. Even at a practical brightness of 1000 cd m^-2, the current efficiency and power efficiency remained as high as 39.2 cd A^-1 and 22.3 lm W^-1. Notably, all doped devices exhibited low efficiency roll-off, especially for device incorporation of tBu-Ir-PB as the guest emitter, which had extremely low roll-off of 0.9%. Meanwhile, non-doped devices based on these iridium(III) complexes also displayed good EL performances.

RSC Advances 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 C5H7NO, Formula: C19H14N2.

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

Peng, Jinsong published the artcileCopper-catalyzed intramolecular C-N bond formation: a straightforward synthesis of benzimidazole derivatives in water, Product Details of C19H14N2, the publication is Journal of Organic Chemistry (2011), 76(2), 716-719, database is CAplus and MEDLINE.

A straightforward, efficient, and more sustainable copper-catalyzed method has been developed for intramol. N-arylation providing the benzimidazole ring system. With Cu₂O (5 mol %) as the catalyst, DMEDA (10 mol %) as the ligand, and K₂CO₃ as the base, this protocol was applied to synthesize a small library of benzimidazoles, e.g., I in high yields. Remarkably, the reaction was exclusively carried out in water, rendering the methodol. highly valuable from both environmental and economical points of view.

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

Yu, Dan published the artcileCuO nanoparticle-catalyzed diaminations for synthesis of benzimidazole derivatives, Name: 1,2-Diphenyl-1H-benzo[d]imidazole, the publication is Applied Organometallic Chemistry (2016), 30(8), 695-698, database is CAplus.

Copper oxide nanoparticles were applied as an efficient catalyst for the formation of C-N bonds. They can catalyze diaminations for the regiospecific synthesis of 1,2-disubstituted benzimidazoles from 1,2-dihaloarenes and N-arylamidines. The best performance was achieved using CuO nanoparticles with average diameter of 6.5 nm. In addition, the catalyst can be recycled and reused without any significant decrease in catalytic activity.

Applied Organometallic 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 C9H5ClO2, Name: 1,2-Diphenyl-1H-benzo[d]imidazole.

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

Lukasik, E. published the artcileSynthesis of 1-arylbenzimidazoles and dibenzo[b,e][1,4]diazepines from 2-(arylamino)aryliminophosphoranes, Synthetic Route of 2622-67-5, the publication is ARKIVOC (Gainesville, FL, United States) (2016), 67-85, database is CAplus.

2-(Arylamino)aryliminophosphoranes, easily obtained from 2-nitrosodiarylamines,were found to be convenient starting materials for simple reactions with common acylating reagents such as acid chlorides and the Vilsmeier reagent. The reactions allowed for the synthesis of 1,2-disubstituted benzimidazoles or dibenzo[b,e][1,4]diazepines, depending on the substituents on the 2-arylamine nitrogen atom.

ARKIVOC (Gainesville, FL, United States) 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, Synthetic Route of 2622-67-5.

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