Shin, Geon’s team published research in ACS Macro Letters in 2019 | CAS: 141-86-6

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.Computed Properties of C5H7N3

The author of 《Cation-Directed Self-Assembly of Macrocyclic Diacetylene for Developing Chromogenic Polydiacetylene》 were Shin, Geon; Khazi, Mohammed Iqbal; Kundapur, Umesha; Kim, Bubsung; Kim, Youngmee; Lee, Chan Woo; Kim, Jong-Man. And the article was published in ACS Macro Letters in 2019. Computed Properties of C5H7N3 The author mentioned the following in the article:

The cation-directed self-assembly process has emerged as a fascinating approach for constructing supramol. architectures and manifested a diverse range of assembly related applications. Herein, we synthesized a macrocyclic structure containing bis-amidopyridine and photopolymerizable diacetylene template, PyMCDA. Owing to the metal coordination affinity of bis-amidopyridine and the π-π stacking characteristic of diacetylene template and complementary to the cyclic mol. framework, Cs+-directed organic nanotubes are generated via unidirectional self-assembly of PyMCDA. The monomeric PyMCDA nanotubes are transformed into the covalently crosslinked chromogenic polydiacetylene nanotubes (PyMCPDA-Cs+) by UV-promoted topochem. polymerization The result of a metal-ligand coordination characteristic, geometric parameters in solid-state assemblies, and topochem. polymerization behavior reveals a generation of Cs+ ion inserted nanotubes. Interestingly, PyMCDA-Cs+ nanotubes display thermochromic property with a brilliant blue-to-red color transition. In the experimental materials used by the author, we found 2,6-Diaminopyridine(cas: 141-86-6Computed Properties of C5H7N3)

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.Computed Properties of C5H7N3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Lin, Zhou’s team published research in Wuli Huaxue Xuebao in 2019 | CAS: 141-86-6

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.Quality Control of 2,6-Diaminopyridine

The author of 《Molybdenum carbide prepared by a salt sealing approach as an electrocatalyst for enhanced hydrogen evolution reaction》 were Lin, Zhou; Shen, Linfan; Qu, Ximing; Zhang, Junming; Jiang, Yanxia; Sun, Shigang. And the article was published in Wuli Huaxue Xuebao in 2019. Quality Control of 2,6-Diaminopyridine The author mentioned the following in the article:

Molybdenum carbide is regarded as an excellent substitute for Pt-based catalysts in the hydrogen evolution reaction (HER), owing to its low cost, superior catalytic performance, and long-term stability. In this work, salt-sealed molybdenum carbide was prepared using sodium molybdate and 2, 6-diaminopyridine as the reactive raw materials, followed by continuous salt sealing and calcination of the precursor under an inert atm. The morphol., composition and structure of salt-sealed molybdenum carbide were determined by SEM, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and XPS. The results indicate that salt-sealed molybdenum carbide has irregular morphol. and includes nanoparticles and nanorods. A comparison of the TEM images of Mo2C with salt sealing (Mo2C/SS) and Mo2C without salt sealing (Mo2C) indicates that Mo2C/SS exhibits a smaller particle size. This suggests that salt sealing can efficiently avoid particle aggregation. The Brunauer-EmmettTeller (BET) sp. surface area of the catalysts was obtained from nitrogen adsorption/desorption isotherms. The increase in BET surface area from 2.55 to 8.14 m2·g-1 after salt sealing provides evidence for the formation of pores in the product. The results of XRD, EDS and XPS analyses show that Mo2C/SS has an orthorhombic crystal structure with molybdenum oxides on the surface, which may originate from surface oxidation Considering the results of XPS and the turnover frequency (TOF) calculation, we can conclude that the formation of pores via salt sealing contributes to the exposure of more active sites, while simultaneously enlarging the contact area with oxygen. Therefore, higher molybdenum oxide content is generated on the surface, resulting in a lower proportion of active centers (molybdenum carbides) on the catalyst surface. Furthermore, the pseudocapacitance generated by the faradaic reaction of molybdenum oxides is superimposed on the double-layer capacitance of Mo2C catalysts, which increases the double layer capacitance. Since the effect of pseudo-capacitance on Mo2C/SS is more significant, the TOF number declines after salt sealing. Compared with Mo2C, Mo2C/SS exhibits three features that promote HER mass activity: (1) the generation of large quantities of pores via salt sealing leads to an increase in the BET surface area and exposure of more active sites, which is beneficial for improving HER performance; (2) the porous structure and enlarged surface area pave the way for effective mass and charge transfer; (3) the decrease of the Tafel slope from 145 to 88 mV·dec-1. In summary, salt-sealed Mo2C exhibited enhanced HER activity with an overpotential of 175 m V to achieve a c.d. of 10 mA·cm-2. The Tafel slope for HER on salt-sealed Mo2C is 88 mV·dec-1. This can be considered as the proof of the Volmer-Heyrovsky mechanism with electrochem. desorption as the rate-determining step. In the experiment, the researchers used 2,6-Diaminopyridine(cas: 141-86-6Quality Control of 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.Quality Control of 2,6-Diaminopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Guo, Beibei’s team published research in Chemical Science in 2019 | CAS: 100-48-1

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

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

Chen, Bingfeng’s team published research in ACS Catalysis in 2020 | CAS: 141-86-6

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

《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

Sun, Yunlong’s team published research in ChemistrySelect in 2020 | CAS: 626-05-1

2,6-Dibromopyridine(cas: 626-05-1) 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. Name: 2,6-Dibromopyridine

《Fabrication and Application of Graphene Supported Diimine-Palladium Complex Catalyst for Organic Synthesis》 was published in ChemistrySelect in 2020. These research results belong to Sun, Yunlong; Li, Tian. Name: 2,6-Dibromopyridine The article mentions the following:

In this paper, a diimine palladium complex with suitable steric hindrance of iso-Pr groups and electron supply provided excellent protection for palladium active centers was synthesized and anchored on graphene oxide (GO) to obtain a reusable heterogeneous catalyst (Pd-DI@GO). The XPS results confirmed the effective loading of palladium and the interaction between palladium and ligand. The ICP-AES data verified the Pd content of catalyst was 5.04 wt% and confirmed extremely small amount Pd leaching in Suzuki reaction (<1 ppm). The Pd-DI@GO could catalyze Suzuki reaction and C-H direct arylation reaction of aryl bromides and arylboronic acids/heterocycles to afford biaryls R-R1 [R = Ph, 4-MeC6H4, 2-MeOC6H4, etc.; R1 = Ph, 1-naphthyl, 2-pyridyl, etc] and R2-R3 [R2 = Ph, 4-ClC6H4, 4-tBuC6H4, etc. R3 = 2,4-(Me)2-5-thiazolyl, 2-Me-5-thiazolyl, 4-Me-5-thiazolyl] with high yields. Notably, the Pd-DI@GO could be recycled after Suzuki reaction via filtration or centrifugation easily, presented a yield above 90% for the 4th run. After reading the article, we found that the author used 2,6-Dibromopyridine(cas: 626-05-1Name: 2,6-Dibromopyridine)

2,6-Dibromopyridine(cas: 626-05-1) 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. Name: 2,6-Dibromopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Carvalho, O. Quinn’s team published research in iScience in 2020 | CAS: 1122-54-9

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

《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

Zhang, Sheng’s team published research in Organic Letters in 2020 | CAS: 100-48-1

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

《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

Han, Shuang’s team published research in Electroanalysis in 2020 | CAS: 1692-25-7

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

《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

Zeng, Jialin’s team published research in Organic Letters in 2020 | CAS: 624-28-2

2,5-Dibromopyridine(cas: 624-28-2) 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.Safety of 2,5-Dibromopyridine

《Iridium-Catalyzed ortho-C-H Borylation of Thioanisole Derivatives Using Bipyridine-Type Ligand》 was written by Zeng, Jialin; Naito, Morio; Torigoe, Takeru; Yamanaka, Masahiro; Kuninobu, Yoichiro. Safety of 2,5-Dibromopyridine And the article was included in Organic Letters in 2020. The article conveys some information:

A simple iridium catalytic system was developed that allows for a variety of 2-borylthioanisoles, e.g. I, to be easily synthesized via ortho-selective C-H borylation of thioanisole derivatives Once introduced, boryl and methylthio groups were converted by palladium-catalyzed transformations. D. functional theory calculations revealed that weak interactions, such as hydrogen bonding between the C-H bond of the SCH3 group and the oxygen atom of the boryl ligand, control the ortho-selectivity. The results came from multiple reactions, including the reaction of 2,5-Dibromopyridine(cas: 624-28-2Safety of 2,5-Dibromopyridine)

2,5-Dibromopyridine(cas: 624-28-2) 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.Safety of 2,5-Dibromopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Luo, Mu-Jia’s team published research in Green Chemistry in 2021 | CAS: 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

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