Tag: M.W=200-250

Li, Hongchao published the artcileNovel soluble N-phenyl-carbazole-containing PPVs for light-emitting devices: Synthesis, electrochemical, optical, and electroluminescent properties, Application In Synthesis of 146370-51-6, the publication is Macromolecular Chemistry and Physics (2004), 205(2), 247-255, database is CAplus.

Novel PPV derivatives (PCA8-PV and PCA8-MEHPV) containing N-phenyl-carbazole units on the backbone were successfully synthesized by the Wittig polycondensation of 3,6-bisformyl-N-(4-octyloxy-phenyl)carbazole with the corresponding tri-Bu phosphonium salts in good yields. The newly formed and dominant trans vinylene double bonds were confirmed by FT-IR and NMR spectroscopy. The polymers (with M̅_w of 6289 for PCA8-PV and 7387 for PCA8-MEHPV) were soluble in common organic solvents and displayed high thermal stability (T_gs are 110.7°C for PCA8-PV and 92.2°C for PCA8-MEHPV, resp.) because of the incorporation of the N-phenyl-carbazole units. Cyclic voltammetry investigations (onsets: 0.8 V for PCA8-PV and 0.7 V for PCA8-MEHPV) suggested that the polymers possess enhanced hole injection/transport properties, which can be also attributed to the N-phenyl-carbazole units on the backbone. Both the single-layer and the double-layer light-emitting diodes (LEDs) that used the polymers as the active layer emitted a greenish-blue or bluish-green light (the maximum emissions located 494 nm for PCA8-PV and 507 nm for PCA8-MEHPV, resp.). Compared with those of the single-layer devices, the emission efficiencies of the double-layer devices, in which an electron-transporting layer (Alq₃) was added, were enhanced by a factor of 10, implying that the better hole-electron balance is achieved because of the incorporation of the electron-transporting layer.

Macromolecular Chemistry and Physics published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, Application In Synthesis of 146370-51-6.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Li, Shengbiao published the artcilePoly-(p-phenylene vinylenes) with pendent 2,4-difluorophenyl and fluorenyl moieties: Synthesis, characterization, and device performance, Application In Synthesis of 146370-51-6, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2009), 47(10), 2500-2508, database is CAplus.

To improve efficiency, processability, and stability, three novel poly(p-phenylenevinylenes) (PPVs) derivatives (P_a, P_b, and P_c) with pendent 2,4-difluorophenyl and fluorenyl moieties were synthesized via Gilch reaction. Their structures were characterized by ¹H NMR, ¹³C NMR, and ELEM. ANAL. Compared with those of PPV and MEH-PPV, the absolute quantum efficiencies of these polymers showed remarkable improvement (measured at 38.7, 37.2, and 20.3%, resp.), which can be attributed to the presence of twisted multiaryl segments and fluorine atoms. TGA revealed that the inflection temperatures of their thermal decomposition curves were above 400°. Double-layered electroluminescent devices with these polymers as light-emitting layers [ITO/PEDOT:PSS/Polymer/Ba/Al] showed peak emissions at 493/515, 503, and 600 nm and maximum luminance of 2700, 450, and 4700 cd/m² for P_a, P_b, and P_c, resp., with onset voltages of ∼4 V. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 2500-2508, 2009.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, Application In Synthesis of 146370-51-6.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Xie, Chen published the artcileSelf-Assembled Semiconducting Polymer Nanoparticles for Ultrasensitive Near-Infrared Afterglow Imaging of Metastatic Tumors, Quality Control of 146370-51-6, the publication is Advanced Materials (Weinheim, Germany) (2018), 30(21), n/a, database is CAplus and MEDLINE.

Detection of metastatic tumor tissues is crucial for cancer therapy; however, fluorescence agents that allow to do share the disadvantage of low signal-to-background ratio due to tissue autofluorescence. The development of amphiphilic poly(p-phenylenevinylene) derivatives that can self-assemble into the nanoagent (SPPVN) in biol. solutions and emit near-IR afterglow luminescence after cessation of light irradiation for ultrasensitive imaging of metastatic tumors in living mice is herein reported. As compared with the counterpart nanoparticle (PPVP) prepared from the hydrophobic PPV derivate, SPPVN has smaller size, higher energy transfer efficiency, and brighter afterglow luminescence. Moreover, due to the higher PEG d. of SPPVN relative to PPVP poly(ethylene glycol), SPPVN has a better accumulation in tumor. Such a high sensitivity and ideal biodistribution allow SPPVN to rapidly detect xenograft tumors with the size as small as 1 mm³ and tiny peritoneal metastatic tumors that are almost invisible to naked eye, which is not possible for PPVP. Moreover, the oxygen-sensitive afterglow makes SPPVN potentially useful for in vivo imaging of oxygen levels. By virtue of enzymic biodegradability and ideal in vivo clearance, these organic agents can serve as a platform for the construction of advanced afterglow imaging tools.

Advanced Materials (Weinheim, Germany) published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C12H23N3S, Quality Control of 146370-51-6.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Wu, Wei published the artcileSynthesis and light-emitting performance of MEH-PPV-type monomer 2,5-bis(4-bromo-2,5-dimethoxyphenylvinylene)-1-methoxy-4-(2-ethylhexyloxy)benzene, Synthetic Route of 146370-51-6, the publication is Hecheng Huaxue (2010), 18(2), 222-225, database is CAplus.

A method for the preparation of a green light-emitting monomer [i.e., bis[(4-bromo-2,5-dimethoxyphenyl)vinylene]-1-methoxy-4-[(2-ethylhexyl)oxy]benzene, 1,4-bis[2-(4-bromo-2,5-dimethoxyphenyl)ethenyl]-2-[(2-ethylhexyl)oxy]-5-methoxybenzene] was designed and the synthesis of the target compound was achieved (44.7% yield) by a Wittig-Horner reaction of 2,5-dimethoxy-4-bromobenzaldehyde with P,P‘-[[2-[(2-ethylhexyl)oxy]-5-methoxy-1,4-phenylene]bis(methylene)]bis[phosphonic acid] P,P,P‘,P‘-tetraethyl ester and the product thus obtained was confirmed by ¹H-NMR, ¹³C-NMR, elemental anal. The light-emitting performance of that compound was also determined by UV-Vis and fluorescence anal. and the results showed that λ_max of UV-Vis and fluorescence (FL) were 410 nm and 479 nm, 497 nm, resp. The title compound is a MEH-PPV-type monomer used for light-emitting diodes.

Hecheng Huaxue published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C8H10BNO3, Synthetic Route of 146370-51-6.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Sahin, Neslihan published the artcileFirst used of Alkylbenzimidazole-Cobalt(II) complexes as a catalyst for the N-Alkylation of amines with alcohols under solvent-free medium, Related Products of ethers-buliding-blocks, the publication is Journal of Organometallic Chemistry (2020), 121285, database is CAplus.

Alkylbenzimidazole-cobalt(II) I [R = allyl, 2-methylallyl, 2-vinyloxyethyl]-catalyzed direct N-alkylation reactions of amines with alcs. derivatives was investigated under solvent-free medium. For this purpose, a series of cobalt(II) complexes I was synthesized and novel complexes fully characterized by elemental anal., FT-IR, ¹H-NMR and ¹³C-NMR spectroscopies. Also, the structure of the complex I [R = allyl] was confirmed by X-ray crystallog. Generally, the N-alkylating reaction is usually performed in toluene with various metal complexes including cobalt. In this catalytic study of complexes I, was carried out without solvent and alc. acted both as solvent and reactant. Conversion and selectivity of amine products according to imine products for alkylation reactions were seen high yield in medium solvent-free relative to in toluene.

Journal of Organometallic Chemistry published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Related Products of ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Xiao, Yang published the artcileConjugated copolymers of 2-methoxy-5-2′-ethyl-hexyloxy-1,4-phenylenevinylene and 2,5-dicyano-1,4-phenylenevinylene as materials for polymer light-emitting diodes, HPLC of Formula: 146370-51-6, the publication is Synthetic Metals (1999), 106(3), 165-170, database is CAplus.

A series of electroluminescent polymers was prepared, which incorporates segments of 2,5-dicyano-1,4-phenylenevinylene (DCN-PV) into the backbone of poly(2-methoxy-5-(2′-ethyl-hexyloxy)-p-phenylene vinylene) (MEH-PPV). The copolymers have optical properties similar to those of MEH-PPV. The oxidation potential of the copolymers is slightly larger than that of MEH-PPV. The copolymers exhibit pre-reduction processes, beginning at about -0.9 V (vs. SCE), before the main reduction processes. The pre-reduction feature promotes electron injection, consequently, it improves electroluminescence (EL) performance. The improved EL performance of the copolymers in comparison with MEH-PPV was demonstrated by a single-layer copolymer as emitter layer in a light-emitting diode (PLED) test device.

Synthetic Metals published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C14H31NO2, HPLC of Formula: 146370-51-6.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Cano, Rafael published the artcileImpregnated palladium on magnetite as catalyst for multicomponent reductive amination reactions and other related reducing processes, HPLC of Formula: 52818-63-0, the publication is Tetrahedron (2011), 67(42), 8079-8085, database is CAplus.

The impregnated palladium oxide on magnetite catalyst is a versatile system for different reduction processes using inexpensive polymethylhydrosiloxane, including multicomponent reductive amination reactions, and aldehyde, imine, sulfinimide and sulfoxide reductions This catalyst avoids the use of any type of expensive organic ligand, showing excellent yields under mild reaction conditions. The catalyst is easily removed from the reaction medium, just by using a magnet. The catalytic system is very selective permitting the discrimination between ketones and aldehydes in the reductive amination process.

Tetrahedron published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, HPLC of Formula: 52818-63-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Martinez-Asencio, Ana published the artcilePalladium(II) acetate as catalyst for the N-alkylation of aromatic amines, sulfonamides, and related nitrogenated compounds with alcohols by a hydrogen autotransfer process, Formula: C13H14N2O, the publication is Synthesis (2011), 3730-3740, database is CAplus.

Palladium(II) acetate is a versatile, inexpensive, and simple catalyst for the selective N-monoalkylation of amino derivatives with poor nucleophilic character, such as aromatic and heteroaromatic amines as well as carboxamides, sulfonamides, and phosphazenes, using, in all cases, primary alcs. as the initial source of the electrophile, through a hydrogen autotransfer process. The regioselectivity of the benzothiazol-2-amine alkylation is contrary to that found using halogenated electrophiles.

Synthesis published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Formula: C13H14N2O.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Xia, Jin published the artcileUltrasonic synthesis and structure characterization of poly(2-ethoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene), COA of Formula: C15H24O2, the publication is Huagong Xinxing Cailiao (2008), 36(9), 63-65, database is CAplus.

The preparation of poly(2-ethoxy-5-(2′-ethylhexyloxy)-phenylenevinylene) (MEH-PPV) was investigated with p-methoxyphenol as raw material. Gel-free soluble and high-mol.-weight (M_n) MEH-PPV was prepared by the method of ultrasonic synthesis. The molar weight of the polymer was 7.9 × 10⁵. The structure of the polymer was identified by IR, ¹H-NMR and Raman spectra.

Huagong Xinxing Cailiao published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C19H21N3O, COA of Formula: C15H24O2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Li, Bo published the artcileRegioselectivity and Mechanism of Synthesizing N-Substituted 2-Pyridones and 2-Substituted Pyridines via Metal-Free C-O and C-N Bond-Cleaving of Oxazoline[3,2-a]pyridiniums, Product Details of C13H14N2O, the publication is Scientific Reports (2017), 41287pp., database is CAplus and MEDLINE.

Novel intermediate oxazoline[3,2-a]pyridiniums were facilely prepared from 2-(2,2-dimethoxyethoxy)-pyridines via acid promoted intramol. cyclization. Sequentially, the quaternary ammonium salts were treated with different nucleophiles for performing regioselective metal-free C-O and C-N bond-cleaving to afford prevalent heterocyclic structures of N-substituted pyridones and 2-substituted pyridines. The reaction mechanism and regioselectivity were then systematically explored by quantum chem. calculations at B3LYP/6-31 g(d) level. The calculated free energy barrier of the reactions revealed that aniline and aliphatic amines (e.g., methylamine) prefer to attack C8 of intermediate, affording N-substituted pyridones, while phenylmethanamine, 2-phenylethan-1-amine and 3-phenylpropan-1-amine favor to attack C2 of the intermediate to form 2-substituted pyridines. With the optimized geometries of the transition states, it was found that the aromatic ring of the Ph aliphatic amines may form cation-π interaction with the pyridinium of the intermediates, which could stabilize the transition states and facilitate the formation of 2-substituted pyridines.

Scientific Reports published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Product Details of C13H14N2O.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem