Tag: 100-200

Deeba, Rana; Chardon-Noblat, Sylvie; Costentin, Cyrille published an article in 2021. The article was titled 《Molecular Catalysis of Electrochemical Reactions: Competition between Reduction of the Substrate and Deactivation of the Catalyst by a Cosubstrate Application to N2O Reduction》, and you may find the article in ChemElectroChem.Computed Properties of C6H4N2 The information in the text is summarized as follows:

In the context of mol. catalysis of electrochem. reactions, the competition between reduction of the substrate and deactivation of the catalyst by a cosubstrate is investigated. It is a frequent situation because proton donors are ubiquitous cosubstrates in reductive electrochem. reactions and mol. catalysts, either transition metal complexes or organic aromatic mols., and are often prone to electrohydrogenation. We provide a formal kinetic anal. in the framework of cyclic voltammetry, and we show that the response is governed by two parameters and that the competition does not depend on the scan rate. From this anal. a methodol. is proposed to analyze such systems and then illustrated via the study of N2O to N2 electroreduction catalyzed by 4-cyanopyridine in acetonitrile electrolyte with water as proton donor. Incidentally, new insights into the mechanism of 4-cyanopyridine radical anion protonation are revealed. The experimental part of the paper was very detailed, including the reaction process of 4-Cyanopyridine(cas: 100-48-1Computed Properties of C6H4N2)

4-Cyanopyridine(cas: 100-48-1) 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.Computed Properties of C6H4N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Punia, Monika; Khatkar, Satyender Pal; Taxak, Vinod Bala; Dhankhar, Priyanka; Boora Doon, Priti published an article in 2021. The article was titled 《Synthesis of cool white light emitting novel dysprosium (Dy3+) complexes with tetradentate β-ketoamide and heterocyclic auxiliary ligands》, and you may find the article in Luminescence.Computed Properties of C12H12N2 The information in the text is summarized as follows:

To improve current multiphase white light emitting diodes (WLEDs), a novel series of five complexes consisting of one binary and four ternary complexes that emitted cool white light was successfully synthesized using a chelating tetradentate ligand and auxiliary ligands, i.e. 5,6-dimethyl-1,10-phenanthroline, 1,10-phenanthroline, 4,4′-dimethyl-2,2′-bipyridyl, and 2,2′-bipyridyl. The series was examined structurally using elemental anal., Fourier transform IR spectroscopy, energy dispersive X-ray anal., UV-visible spectroscopy, and proton NMR spectroscopy. These complexes had the appropriate thermal stability required for the generation of white organic LEDs (WOLEDs). Dysprosium (III) (Dy3+) ion complexes demonstrated the characteristic emission peaks of blue color at 482 nm and yellow color at 572 nm, resp., when excited using near UV light. Band gap, refractive index, and decay lifetime of the optimized samples were recorded as 2.68 eV, 2.12, and 1.601 ms, resp. Correlated color temperature value (7875 K), Commission International de l′Eclairage coordinates (0.300, 0.294), and color purity (21.04 x 10-2) of the optimized complex were near to those of white illuminants as defined by the National Television System Committee. These complexes had promise as com. LEDs for the advanced optoelectronics devices, especially as WOLEDs for illumination applications. In the experiment, the researchers used many compounds, for example, 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Computed Properties of C12H12N2)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Computed Properties of C12H12N2 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Campos, Joana F.; Cailler, Manon; Claudel, Remi; Prot, Benjamin; Besson, Thierry; Berteina-Raboin, Sabine published an article in 2021. The article was titled 《Demonstration of green solvent performance on O,S,N-heterocycles synthesis: metal-free click chemistry and Buchwald-Hartwig coupling》, and you may find the article in Molecules.Application In Synthesis of 2-Bromo-5-methylpyridine The information in the text is summarized as follows:

In this work, the efficiency of three solvents: eucalyptol (1,8-cineole), cyclopentyl Me ether (CPME), and 2-methyltetrahydrofuran (2-MeTHF) for the synthesis of O,S,N-heterocyclic compounds e.g., I was demonstrated. In the experimental materials used by the author, we found 2-Bromo-5-methylpyridine(cas: 3510-66-5Application In Synthesis of 2-Bromo-5-methylpyridine)

2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Application In Synthesis of 2-Bromo-5-methylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Li, Zhuang; Cheng, Xian-Yan; Yang, Ning-Yuan; Chen, Ji-Jun; Tang, Wen-Yue; Bian, Jun-Qian; Cheng, Yong-Feng; Li, Zhong-Liang; Gu, Qiang-Shuai; Liu, Xin-Yuan published their research in Organometallics in 2021. The article was titled 《A Cobalt-Catalyzed Enantioconvergent Radical Negishi C(sp3)-C(sp2) Cross-Coupling with Chiral Multidentate N,N,P-Ligand》.Quality Control of 4-Acetylpyridine The article contains the following contents:

A cobalt-catalyzed enantioconvergent radical Negishi C(sp3)-C(sp2) cross-coupling of racemic benzyl chlorides with arylzinc reagents has been developed in good yield with moderate enantioselectivities. This strategy provides an expedient access toward a range of enantioenriched 1,1-diarylmethanes. Key to this discovery is the utilization of a chiral multidentate anionic N,N,P-ligand to strongly coordinate with the cobalt catalyst and tune its chiral environment, thus achieving the enantiocontrol over the highly reactive prochiral alkyl radical species. In the part of experimental materials, we found many familiar compounds, such as 4-Acetylpyridine(cas: 1122-54-9Quality Control of 4-Acetylpyridine)

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Quality Control of 4-Acetylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Luo, Mu-Jia; Ouyang, Xuan-Hui; Zhu, Yan-Ping; Li, Yang; Li, Jin-Heng published their research in Green Chemistry in 2021. The article was titled 《Metal-free electrochemical [3 + 2] heteroannulation of anilines with pyridines enabled by dual C-H radical aminations》.Related Products of 1122-54-9 The article contains the following contents:

An unprecedented metal-/external-oxidant-free electrochem. intermol. [3+2] heteroannulation of anilines with electron-deficient pyridines enabled by dual C-H radical aminations for producing functionally diverse benzo[4,5]imidazo[1,2-a]pyridines was described. The site-selectivity of aminations of aryl C(sp2)-H bonds relied on the electronic effect of two reaction partners: each contributed two reactive sites (a C(sp2)-H bond and a nitrogen atom-based functional group) and the electron-withdrawing groups at the 4 position of the pyridine ring were crucial. Mechanistic studies have shown that this method sequence consisted of the generation of the nitrogen-centered radical (NCR) and the pyridine radical anion, radical coupling, and dual C-N aminations. In the experiment, the researchers used 4-Acetylpyridine(cas: 1122-54-9Related Products of 1122-54-9)

4-Acetylpyridine(cas: 1122-54-9) 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.Related Products of 1122-54-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Synergistic Enhancement Effects of Carbon Quantum Dots and Au Nanoclusters for Cathodic ECL and Non-enzyme Detections of Glucose》 was written by Han, Shuang; Gao, Yuan; Li, Lin; Lu, Beibei; Zou, Yongxing; Zhang, Ling; Zhang, Jiaheng. Quality Control of Pyridin-3-ylboronic acid And the article was included in Electroanalysis in 2020. The article conveys some information:

In this study, we found that glucose enhance electrochemiluminescence (ECL) intensity of both Au nanoclusters (Au NCs) and carbon quantum dots (CQDs) with K2S2O8 as the co-reactants. The enhancing effects by Au NCs and CQDs were overlapped, enabling the detection of glucose. The increased ECL intensity of glucose was linear with the logarithm of concentrations of glucose in the range of 50μM-3.0 mM, and the limit of detection is 20μM. Anti-interruption ability was achieved, and ascorbic acid, urea, and uric acid had little influence to glucose detection. This method realized the direct detection of glucose by enhancing ECL of Au NCs and CQDs, which was fast and economic, possessing potential applications for glucose detection in human serum. After reading the article, we found that the author used Pyridin-3-ylboronic acid(cas: 1692-25-7Quality Control of Pyridin-3-ylboronic acid)

Pyridin-3-ylboronic acid(cas: 1692-25-7) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Quality Control of Pyridin-3-ylboronic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Electroreductive 4-Pyridylation of Electron-deficient Alkenes with Assistance of Ni(acac)2》 was written by Zhang, Sheng; Li, Lijun; Li, Xinru; Zhang, Junqi; Xu, Kun; Li, Guigen; Findlater, Michael. Electric Literature of C6H4N2 And the article was included in Organic Letters in 2020. The article conveys some information:

An electroreductive 4-pyridylation of activated alkenes was developed in an undivided cell with the assistance of Ni(acac)2 (acac = acetylacetone). This novel protocol was compatible with a broad range of electron-poor alkenes, which were commonly regarded as challenging substrates in the previous conventional approaches. Moreover, a series of cyclic voltammetric experiments were conducted to reveal the unique role of Ni(acac)2 differentiating reduction process of reaction partners. The experimental part of the paper was very detailed, including the reaction process of 4-Cyanopyridine(cas: 100-48-1Electric Literature of C6H4N2)

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Electric Literature of C6H4N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Understanding the Role of Surface Heterogeneities in Electrosynthesis Reactions》 was written by Carvalho, O. Quinn; Adiga, Prajwal; Murthy, Sri Krishna; Fulton, John L.; Gutierrez, Oliver Y.; Stoerzinger, Kelsey A.. Formula: C7H7NO And the article was included in iScience in 2020. The article conveys some information:

In this perspective, we highlight the role of surface heterogeneity in electrosynthesis reactions. Heterogeneities may come in the form of distinct crystallog. facets, boundaries between facets or grains, or point defects. We approach this topic from a foundation of surface science, where signatures from model systems provide understanding of observations on more complex and higher-surface-area materials. In parallel, probe-based techniques can inform directly on spatial variation across electrode surfaces. We call attention to the role spectroscopy can play in understanding the impact of these heterogeneities in electrocatalyst activity and selectivity, particularly where these surface features have effects extending into the electrolyte double layer. The experimental process involved the reaction of 4-Acetylpyridine(cas: 1122-54-9Formula: C7H7NO)

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Formula: C7H7NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《CO2 Hydrogenation to Formate Catalyzed by Ru Coordinated with a N,P-Containing Polymer》 was published in ACS Catalysis in 2020. These research results belong to Chen, Bingfeng; Dong, Minghua; Liu, Shulin; Xie, Zhenbing; Yang, Junjuan; Li, Shaopeng; Wang, Yanyan; Du, Juan; Liu, Huizhen; Han, Buxing. Name: 2,6-Diaminopyridine The article mentions the following:

Development of high-performance catalysts for carbon dioxide (CO2) hydrogenation is crucial for CO2 utilization. Herein, a heterogeneous catalyst for CO2 hydrogenation to formate was developed by coordinating the mononuclear Ru3+ center (Ru hereafter) with a N,P-containing polymer, which was synthesized from phosphonitrilic chloride trimer and 2,6-diaminopyridine. Multiple nitrogen functionalities in the polymer (N content: 25.9 wt %) containing pyridine nitrogen and phosphazene nitrogen not only provided an electron-rich coordination environment for stabilizing mononuclear Ru center but also facilitated CO2 conversion by interacting with CO2 mols. The polymer-coordinated mononuclear Ru catalysts (Ru/p-dop-POMs) could promote the hydrogenation of CO2 to formate with a turnover number (TON) up to 25.4 x 103 in aqueous solutions, and the concentration of formate in the solution could reach 3.4 mol/L. DFT calculations revealed that the electron-rich mononuclear Ru site could promote H2 dissociation, which is the rate-determining step in the reaction, thereby enhancing the catalytic activity. Systemic studies demonstrated that the synergistic effect between individually electron-rich Ru centers and nitrogen-rich polymer enhanced catalytic efficiency. In the experimental materials used by the author, we found 2,6-Diaminopyridine(cas: 141-86-6Name: 2,6-Diaminopyridine)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Name: 2,6-Diaminopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Hydration of nitriles using a metal-ligand cooperative ruthenium pincer catalyst》 were Guo, Beibei; de Vries, Johannes G.; Otten, Edwin. And the article was published in Chemical Science in 2019. Quality Control of 4-Cyanopyridine The author mentioned the following in the article:

The catalytic nitrile hydration using ruthenium catalysts based on a pincer scaffold with a dearomatized pyridine backbone. These complexes catalyzed the nucleophilic addition of H2O to a wide variety of aliphatic and (hetero)aromatic nitriles in tBuOH as solvent. Reactions occurred under mild conditions (room temperature) in the absence of additives. A mechanism for nitrile hydration was proposed that is initiated by metal-ligand cooperative binding of the nitrile. The experimental process involved the reaction of 4-Cyanopyridine(cas: 100-48-1Quality Control of 4-Cyanopyridine)

4-Cyanopyridine(cas: 100-48-1) 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.Quality Control of 4-Cyanopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem