Tag: 200-300

The author of 《Bistrifluoromethylated organocuprate [Ph4P]+[Cu(CF3)2]-: synthesis, characterization and its application for trifluoromethylation of activated heteroaryl bromides, chlorides and iodides》 were Liu, He; Shen, Qilong. And the article was published in Organic Chemistry Frontiers in 2019. Electric Literature of C8H8BrNO2 The author mentioned the following in the article:

The synthesis and characterization of a bistrifluoromethylated organocuprate [Ph4P]+[Cu(CF3)2]- and its reactions with a variety of activated heteroaryl bromides, chlorides and iodides were described. These results showed that complex [Ph4P]+[Cu(CF3)2]- can serve as a trifluoromethylating reagent. In the experiment, the researchers used many compounds, for example, Ethyl 3-bromopicolinate(cas: 434319-41-2Electric Literature of C8H8BrNO2)

Ethyl 3-bromopicolinate(cas: 434319-41-2) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Electric Literature of C8H8BrNO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Martinez-Merino, Victor; Gil, Maria J.; Gonzalez, Alberto; Zabalza, Jose M.; Navarro, Javier; Manu, Maria A. published an article on February 1 ,1994. The article was titled 《New 5-substituted derivatives of ethyl 2,3-dihydro-3-oxoisothiazolo[5,4-b]pyridine-2-acetate》, and you may find the article in Heterocycles.Application of 10177-08-9 The information in the text is summarized as follows:

A new series of Et 5-substituted 2,3-dihydro-3-oxoisothiazolo[5,4-b]pyridine-2-acetate I (R = NH2, Me, Ph, H, NO2) was prepared either a) directly by reaction of 5-substituted 2-chlorothio-3-pyridinecarbonyl chlorides with Et glycine or b) by oxidation of the corresponding 2-mercapto-3-pyridinecarboxamides. Some reactions of the free acids of I as starting materials are described. The experimental process involved the reaction of 2-Oxo-5-phenyl-1,2-dihydropyridine-3-carboxylic acid(cas: 10177-08-9Application of 10177-08-9)

2-Oxo-5-phenyl-1,2-dihydropyridine-3-carboxylic acid(cas: 10177-08-9) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Application of 10177-08-9 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Product Details of 138219-98-4On November 30, 2018 ,《Interfacial self-assembly of bipyridyl-functionalized nanoSiO2-BPy@Ln(β-diketone)n composites and their luminescent properties》 appeared in Journal of Luminescence. The author of the article were Ma, Yue-Yang; Huang, Hong-Xiang; Chen, Meng; Qian, Dong-Jin. The article conveys some information:

Interfacial self-assembly provides an effective route to design and construct various metal-organic hybrid and composite materials with interesting optical and electroactive properties. Here, we reported the interfacial self-assembly of luminescent nano-composites through the coordination reaction of lanthanide salts of Ln(CF3SO3)3 (Ln = Eu and Tb) with the 2,2′-bipyridyl (BPy)-functionalized silica nano-linkers (nanoSiO2-BPy) and several β-diketone ligands. The assembling processes and the nano-materials as-prepared were characterized by using thermogravimetry, IR, UV-vis absorption and XPS, as well as field emission transmission electron microscopy (FE-TEM). The luminescent properties from both nanoSiO2-BPy linkers and lanthanide nano-composites were investigated in the solutions and solid powders, which revealed not only the broad emissions of nanoSiO2-BPy linkers between 400 and 520 nm, but also the sharp emissions between 480 and 750 nm, designated to the 4f-4f electron transitions of 5D4 → 7Fn (n = 3,4,5,6) and 5D0 → 7Fn (n = 0,1,2,3,4) of the Tb3+ and Eu3+ ions, resp. The relative emission intensity of the Ln3+ ions in the nano-composites has been found to be closely dependent on the compositions of the nano-composites, structure of the β-diketone ligands, and the excited wavelengths. Finally, the energy transfer process in the nano-composites was discussed. In the part of experimental materials, we found many familiar compounds, such as 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Product Details of 138219-98-4)

4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. Product Details of 138219-98-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Name: Methyl 5-bromopicolinateIn 2014 ,《An environmentally-friendly one-pot synthesis of 4-sulfonyl benzoic acids》 was published in Tetrahedron Letters. The article was written by Frieman, Bryan A.. The article contains the following contents:

This Letter reported an environmentally-friendly one-pot SNAr reaction of thiols to 4-halobenzoic acid Me esters to provide 4-substituted sulfone benzoic acids and picolinic acids after bleach-mediated oxidative workup. These acid intermediates were synthesized on gram scale, are perfect partners for library synthesis, and have good phys. chem. properties useful for drug discovery. In the experimental materials used by the author, we found Methyl 5-bromopicolinate(cas: 29682-15-3Name: Methyl 5-bromopicolinate)

Methyl 5-bromopicolinate(cas: 29682-15-3) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. Name: Methyl 5-bromopicolinate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 2,5-DibromopyridineIn 2021 ,《Ultrahigh thermal-stability polyimides with low CTE and required flexibility by formation of hydrogen bonds between poly(amic acid)s》 appeared in European Polymer Journal. The author of the article were Yang, Zhenghui; Ma, Pingchuan; Li, Furong; Guo, Haiquan; Kang, Chuanqing; Gao, Lianxun. The article conveys some information:

The flexibility of organic light-emitting diode (OLED) displays highly depends on the properties of the flexible substrates. In this paper, a series of aromatic polyimides have been fabricated via the copolycondensation of pyromellitic dianhydride (PMDA), the two different rigid heterocyclic diamines, 2,5-bis(4-aminophenyl)pyrimidine (PRM) or 2,5-bis(4-aminophenyl)pyridine (PRD), and another flexible diamine, 4,4′-oxydianiline (ODA). The performance of the polyimide films could be systematically tailored by means of adjusting the main-chain rigidity, as well as the close packing and orientation of polymer chains by the formation of the intermol. hydrogen bonds between poly(amic acid)s. The optimal results (PIb-4, PIb-5, PIc-2) showed that the polyimides were endowed with ultra-high glass transition temperature (Tg) exceeding 450°C, low coefficient of thermal expansion (CTE) at 0-5 ppm K-1 and excellent thermal stability (Td5% = 570-590°C). Meanwhile, all of them exhibited sufficient flexibility, the elongation at break at of 40-60%, extremely high tensile strength of 250-380 MPa and modulus of 4.1-6.1 GPa. Hence, the polyimide films should be the promising candidates for application as the polymer substrates for flexible OLED displays. In the part of experimental materials, we found many familiar compounds, such as 2,5-Dibromopyridine(cas: 624-28-2Reference of 2,5-Dibromopyridine)

2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Reference of 2,5-Dibromopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Yi, Chih-Lun; Lin, Chun-Yen; Tang, Yukun; Wang, Chun-Yu; Huang, Chih-Wei; Gong, Xu; Gong, Shaolong; Wu, Chung-Chih; Wong, Ken-Tsung published an article in Advanced Optical Materials. The title of the article was 《A Rational Molecular Design Strategy of TADF Emitter for Achieving Device Efficiency Exceeding 36%》.Category: pyridine-derivatives The author mentioned the following in the article:

An excellent thermally activated delayed fluorescence (TADF) emitter requires a sophisticated mol. design strategy to incorporate structural features to simultaneously achieve high photoluminescence quantum yield (PLQY) and high horizontal emission dipole ratio (Θ//). This work reports the uses of heteroarenes and dicarbonitrile benzenes to design four new acceptors PymCN, PyoCN, PmmCN, and PmoCN, which are linked to a common donor dimethylacridine (DMAC) for making new TADF emitters. The emission wavelength, ΔEST, krisc, kr, and the resulting PLQY of the target TADF emitters are governed by the combined natures of the heteroaryl bridges (Py vs Pm) and the CN-substituted patterns (o-CN vs m-CN). The photophys. and device characteristics reveal the best acceptor to be PyoCN, which is further coupled with spiroacridine to afford a new emitter SpiroAC-PyoCN with an enhanced PLQY of 100% compared to that (91%) of the DMAC-based counterpart DMAC-PyoCN. Furthermore, linking PyoCN with spiro-bisacridine (SBAC) gives an A-D-A-configured TADF emitter SBAC-PyoCN with both enhanced PLQY (100%) and Θ// (90%). The device employing SBAC-PyoCN as emitter renders a maximum external quantum efficiency up to 36.1% owing to its unity PLQY and superior light out-coupling efficiency. This rational mol. design strategy provides a feasible means to achieve an excellent TADF emitter design. In the experimental materials used by the author, we found 2,5-Dibromopyridine(cas: 624-28-2Category: pyridine-derivatives)

2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. When pyridine is adsorbed on oxide surfaces or in porous materials, the following species are commonly observed: (i) pyridine coordinated to Lewis acid sites, (ii) pyridine H-bonded to weakly acidic hydroxyls, and (iii) protonated pyridine. At high coverage, physisorbed pyridine and protonated dimers can also be observed.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Weilhard, Andreas; Argent, Stephen P.; Sans, Victor published an article in 2021. The article was titled 《Efficient carbon dioxide hydrogenation to formic acid with buffering ionic liquids》, and you may find the article in Nature Communications.Quality Control of 2,6-Dibromopyridine The information in the text is summarized as follows:

The efficient transformation of CO2 into chems. and fuels is a key challenge for the decarbonisation of the synthetic production chain. Formic acid (FA) represents the first product of CO2 hydrogenation and can be a precursor of higher added value products or employed as a hydrogen storage vector. Bases are typically required to overcome thermodn. barriers in the synthesis of FA, generating waste and requiring post-processing of the formate salts. The employment of buffers can overcome these limitations, but their catalytic performance has so far been modest. Here, we present a methodol. utilizing IL as buffers to catalytically transform CO2 into FA with very high efficiency and comparable performance to the base-assisted systems. The combination of multifunctional basic ionic liquids and catalyst design enables the synthesis of FA with very high catalytic efficiency in TONs of >8*105 and TOFs > 2.1*104 h-1.2,6-Dibromopyridine(cas: 626-05-1Quality Control of 2,6-Dibromopyridine) was used in this study.

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.Quality Control of 2,6-Dibromopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Comparative dielectric parameters and conductivity mechanisms of pyridine-based rod-like liquid crystals》 was written by Yilmaz Canli, Nimet; Ocak, Hale; Okutan, Mustafa; Karanlik, Gurkan; Bilgin Eran, Belkiz. Application of 29682-15-3 And the article was included in Phase Transitions in 2020. The article conveys some information:

In this study, the dielec. properties and ac conductivity mechanism of pyridine-based rod-like liquid crystals (LC1 and LC2), which show enantiotropic smectic A mesophase, have been investigated by impedance spectroscopy within the frequency interval of 1 kHz-2 MHz. The variation of real and imaginary component of dielec. constant with angular frequency has been investigated. The temperature-dependent absorption coefficient α, relaxation time τo, dielec. strength value Δε, temperature-dependent changes on crystal, SmA and Iso phases have been given. These values were obtained by fitting the exptl. results in ε’-ω graph with the Cole-Cole equation real equation and Origin Pro Graph program. The frequency dependence of ac conductivities has also been analyzed. Different conductivity mechanisms, i.e. dc conductivity, correlated barrier hoping and quantum mech. tunneling behaviors have been determined for different frequency regions. In the experimental materials used by the author, we found Methyl 5-bromopicolinate(cas: 29682-15-3Application of 29682-15-3)

Methyl 5-bromopicolinate(cas: 29682-15-3) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Application of 29682-15-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Martell, Mark; Ocheje, Michael U.; Gelfand, Benjamin S.; Rondeau-Gagne, Simon; Welch, Gregory C. published their research in New Journal of Chemistry in 2021. The article was titled 《Sidechain engineering of N-annulated perylene diimide molecules》.Recommanded Product: 2-(Bromomethyl)pyridine hydrobromide The article contains the following contents:

The synthesis and characterization of six new N-annulated perylene diimide (N-PDI) mols. consisting of different alkyl-based heteroatom and waxy infused sidechains is reported. Amino, urea, quaternary Me ammonium, iminopyridine, hexadecyl and pyridine moieties were all appended to the pyrrolic N-position of N-annulated PDI. These N-PDI derivatives have been synthesized using facile SN2 chem. resulting in high yields and without the need for purification via column chromatog. To further demonstrate the functional diversification offered by N-PDI we appended a cyano group to the 6,7-bay positions opposite the N-annulation site and tested utility in organic field effect transistor devices. Complete characterization of these N-PDI derivatives was completed using UV-Vis spectroscopy, cyclic voltammetry and solubility determination to observe how the appended sidechains affect structure-properties relationships. The experimental part of the paper was very detailed, including the reaction process of 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Recommanded Product: 2-(Bromomethyl)pyridine hydrobromide)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridine is widely used in the precursor to agrochemicals and pharmaceuticals. Also, it is used as an important reagent and organic solvent.Recommanded Product: 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Dykeman, Ryan R.; Yan, Ning; Scopelliti, Rosario; Dyson, Paul J. published an article on February 7 ,2011. The article was titled 《Enhanced rate of arene hydrogenation with imidazolium functionalized bipyridine stabilized rhodium nanoparticle catalysts》, and you may find the article in Inorganic Chemistry.Application In Synthesis of 4,4′-Bis(chloromethyl)-2,2′-bipyridine The information in the text is summarized as follows:

The imidazolium functionalized bipyridine compounds, {4,4′-bis[7-(2,3-dimethylimidazolium)heptyl]-2,2′-bipyridine}2+ ([BIHB]2+) and {4,4′-bis[(1,2-dimethylimidazolium)methyl]-2,2′-bipyridine}2+ ([BIMB]2+), were prepared and used as Rh nanoparticle stabilizers. The dispersed Rh nanoparticles were used as catalysts in the biphasic hydrogenation of various arene substrates. The catalytic activity was strongly influenced by the stabilizer employed and followed the trend [BIHB]2+ > bipy > [BIMB]2+. The steric and electronic characteristics of the imidazolium functionalized bipyridine ligands were assessed via the synthesis of rhenium carbonyl complexes, which facilitated the rationalization of the catalytic properties of the nanoparticles. The results came from multiple reactions, including the reaction of 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Application In Synthesis of 4,4′-Bis(chloromethyl)-2,2′-bipyridine)

4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Application In Synthesis of 4,4′-Bis(chloromethyl)-2,2′-bipyridine Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem