Day: February 13, 2023

Comparative study of the retention of pyridinium and imidazolium based ionic liquids on octadecylsilica stationary phase under ion pairing mechanism with alkylsulphonate anions was written by Radulescu, Medeea;Iorgulescu, Emilia-Elena;Mihailciuc, Constantin;David, Victor. And the article was included in Revue Roumaine de Chimie in 2012.Application of 65350-59-6 This article mentions the following:

Retention data for several pyridinium and imidazolium ionic liquids in presence of alkylsulfonates (C6, C7 and C8) were used in studying the retention of these cations on the octadecylsilica surface. This study showed that ionic liquids can be adsorbed on octadecylsilica surface, due to the polar interactions with the residual silanols from surface of stationary phase and hydrophobic interactions between hydrophobic moiety of these cations and octadecyl chains from the surface of the stationary phase. An unusual chromatog. retention behavior has been observed: the functional dependencies between the logarithm of the retention factor (k) and the methanol content in the mobile phase followed a binomial pattern (U-shaped), with a min. positioned within the interval 60-75% methanol. In the experiment, the researchers used many compounds, for example, 1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6Application of 65350-59-6).

1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6) belongs to pyridine derivatives. Pyridine has a conjugated system of six 锜?electrons that are delocalized over the ring. The molecule is planar and, thus, follows the H鐪塩kel criteria for aromatic systems. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C閳ユ弻 in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Application of 65350-59-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

An efficient conversion of alcohols to alkyl bromides using pyridinium based ionic liquids: a green alternative to appel reaction was written by Das, Pranab J.;Das, Jupitara;Das, Dimpee. And the article was included in Asian Journal of Chemistry in 2018.Formula: C10H16BrN This article mentions the following:

Pyridinium based ionic liquids namely 4-alkylpyridinium bromides were prepared and used for the conversion of alcs. to alkyl bromides in the presence of p-toluenesulfonic acid in the absence of volatile organic compounds This solvent free procedure promises to be a much improved and environmentally benign alternative to the Appel reaction. In the experiment, the researchers used many compounds, for example, 1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6Formula: C10H16BrN).

1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of 閳?8.7 鑴?10閳? cm3璺痬ol閳?.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ璺痬ol閳? in the liquid phase and 140.4 kJ璺痬ol閳? in the gas phase. 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.Formula: C10H16BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Straightforward synthesis of diverse dipyrazolylmethane derivatives and their application for fluorescence sensing of Cu²⁺ ions was written by Kaliraj, Kaliappan;Xia, Likai;Edison, Thomas Nesakumar Jebakumar Immanuel;Lee, Yong Rok. And the article was included in RSC Advances in 2016.Reference of 628-13-7 This article mentions the following:

A variety of dipyrazolylmethane derivatives were synthesized from the reactions of readily available 灏?keto esters with arylhydrazine hydrochlorides and DMF in the presence of p-toluenesulfonic acid (p-TsOH). This methodol provides a concise and practical one-pot route for the construction of diverse dipyrazolylmethane derivatives in good yield. As an application, the synthesized nitro-substituted compound displayed an excellent turn-off fluorescence sensing property for the detection of Cu²⁺ ions. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Reference of 628-13-7).

Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. Pyridine has a conjugated system of six 锜?electrons that are delocalized over the ring. The molecule is planar and, thus, follows the H鐪塩kel criteria for aromatic systems. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Reference of 628-13-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Solvent polarity and oxygen sensitivity, rather than viscosity, determine lifetimes of biaryl-sensitised terbium luminescence was written by Walter, Edward R. H.;Williams, J. A. Gareth;Parker, David. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2017.Quality Control of (4-Bromopyridin-2-yl)methanol This article mentions the following:

In a macrocyclic terbium complex incorporating a biaryl sensitizer, the observed variation of emission lifetime is shown to be determined by the solubility of oxygen in the solvent system and the relative energy of the chromophore excited state, rather than any dependence on solvent viscosity. In the experiment, the researchers used many compounds, for example, (4-Bromopyridin-2-yl)methanol (cas: 131747-45-0Quality Control of (4-Bromopyridin-2-yl)methanol).

(4-Bromopyridin-2-yl)methanol (cas: 131747-45-0) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Quality Control of (4-Bromopyridin-2-yl)methanol

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pyridines from cyanogen-like compounds and unsymmetrical dienes was written by Janz, George J.;Monahan, Alan R.. And the article was included in Journal of Organic Chemistry in 1965.Synthetic Route of C7H6N2 This article mentions the following:

A series of reactions of isoprene and pentadiene with (CN)₂, CF₃CN, and CF₃(CF₂)₂CN at 400鎺?was reported. N.M.R. values for the protons in the Me group in 9 substituted picolines were tabulated. The isomer ratios of the 4-methyl-to 5-methylpyridines were obtained. In the experiment, the researchers used many compounds, for example, 4-Methylpicolinonitrile (cas: 1620-76-4Synthetic Route of C7H6N2).

4-Methylpicolinonitrile (cas: 1620-76-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine derivatives are also useful as small-molecule 浼?helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Synthetic Route of C7H6N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Sorbents for removal surfactants from aqueous solutions: surface modification of natural solids to enhance sorption ability was written by Lukaszczyk, Jan;Lekawska, Ewa;Lunkwitz, Klaus;Petzold, Gudrun. And the article was included in Journal of Applied Polymer Science in 2004.Application of 104-73-4 This article mentions the following:

Particulate materials of natural origin, sulfite cellulose and two kaolinite clays, were modified by the formation of nonstoichiometric polyelectrolyte complex on the surface of particles. This resulted in pos. surface charge on cellulose and clays. Modified materials as well as selected com. polymers were used as sorbents for removal of anionic, nonionic, and cationic surfactants from aqueous solutions The cationic surface modification of cellulose and kaolinite clays resulted in a significant increase of sorption rate and degree of removal of oppositely charged anionic surfactants. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Application of 104-73-4).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the 锜?bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the 锜?bonds. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Application of 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Amphiphilic Oxo-Bridged Ruthenium “Green Dimer” for Water Oxidation was written by Yang, Qing-Qing;Jiang, Xin;Yang, Bing;Wang, Yang;Tung, Chen-Ho;Wu, Li-Zhu. And the article was included in iScience in 2020.COA of Formula: C5H5NO This article mentions the following:

In 1982, an oxo-bridged dinuclear ruthenium(III) complex, known as “blue dimer,” was discovered to be active for water oxidation In this work, a new amphiphilic ruthenium “green dimer” 2, obtained from an amphiphilic mononuclear Ru(bda) (N-OTEG) (L1) (1; N-OTEG = 4-(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)-pyridine; L1 = vinylpyridine) is reported. An array of mechanistic studies identifies “green dimer” 2 as a mixed valence of Ru^II-O-Ru^III oxo-bridged structure. Bearing the same bda2- and amphiphilic axial ligands, monomer 1 and green dimer 2 can be reversibly converted by ascorbic acid and oxygen, resp., in aqueous solution More importantly, the oxo-bridged “green dimer” 2 was found to take water nucleophilic attack for oxygen evolution, in contrast to monomer 1 via radical coupling pathway for O-O bond formation. This is the first report of an amphiphilic oxo-bridged catalyst, which possesses a new oxygen evolution pathway of Ru-bda catalysts. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2COA of Formula: C5H5NO).

Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Pyridine derivatives are also useful as small-molecule 浼?helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.COA of Formula: C5H5NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Periodic Hexagonal Mesostructured Chalcogenides Based on Platinum and [SnSe₄]^4- and [SnTe₄]^4- Precursors. Solvent Dependence of Nanopore and Wall Organization was written by Trikalitis, Pantelis N.;Bakas, Thomas;Kanatzidis, Mercouri G.. And the article was included in Journal of the American Chemical Society in 2005.Related Products of 104-73-4 This article mentions the following:

Mesostructured chalcogenide-based materials with long-range order and semiconducting properties can be prepared using suitable mol. building blocks, linkage metal ions and surfactant mols. In this paper we present surfactant templated, open framework platinum tin selenide and telluride materials assembled using K₄SnQ₄ (Q = Se, Te) salts and K₂PtCl₄ as precursors and a study of pore and wall organization. We find that materials prepared in water exhibit disordered pore organization, whereas those prepared in formamide are long-range ordered with hexagonal symmetry. In formamide the [SnQ₄]^4- anions undergo condensation-oligomerization reactions that produce different chalcogenido mol. species, whereas in water the anions remain intact. In addition to solvent, the pore organization and overall quality of the mesostructured materials strongly depend on the surfactant mols., i.e., chain length and headgroup size. For example, highly ordered mesostructured platinum tin selenides with hexagonal symmetry were obtained using the hydroxyl-functionalized surfactants C_nH_2n+1N(CH₃)(CH₂CH₂OH)₂Br (n = 16, 18, and 20), but when the headgroup was triethylammonium, hexagonal pore order was achieved only for n = 20 and not for n = 16 and 18. The exptl. results imply that in order to achieve highly ordered chalcogenide frameworks a single building anionic block might be insufficient. Finally, we also report the first examples of hexagonal mesostructured Pt/Sn/Te materials based on K₄SnTe₄ as the precursor. The tellurides behave differently for their selenium analogs and have very low energy band gaps, in the range 0.5-0.7 eV. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Related Products of 104-73-4).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Related Products of 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Nickel hydroxide nanoparticles decorated naphthalene sulfonic acid-doped polyaniline nanotubes as efficient catalysts for nitroarene reduction was written by Sypu, Venkata Satyanarayana;Bhaumik, Madhumita;Raju, Kumar;Maity, Arjun. And the article was included in Journal of Colloid and Interface Science in 2021.Computed Properties of C6H6N2O3 This article mentions the following:

Nanosize nickel hydroxide decorated 2-naphthalene sulfonic acid-doped polyaniline nanotubes nanocomposites (Ni(OH)₂@NSA-PANI NCs) were successfully developed for the catalytic reduction of aromatic nitro compounds The Ni(OH)₂@NSA-PANI NCs were synthesized by depositing Ni(OH)₂ nanoparticles onto 2-naphthalene sulfonic acid doped PANI nanotubes surface. The resulting material was characterized using field emission SEM (FE-SEM), high resolution transmission electron microscopy (HR-TEM), powder X-ray diffraction (P-XRD), Fourier-transform IR spectroscopy (FT-IR), and XPS. The prepared nanocomposite showed a remarkable ability to catalytically hydrogenate aromatic nitro compounds using sodium borohydride (NaBH₄) as hydrogen source in aqueous medium at room temperature Kinetic studies were performed using 4-nitrophenol (4-NP) as the model substrate, using the Langmuir-Hinshelwood model. The catalyst showed pseudo-first-order kinetics, with rate constants estimated between 0.08287 and 0.3649 min^-1. Catalyst recyclability without reduced activity was demonstrated over 10 successive cycles. The optimized nanocomposite catalyst demonstrated a low activation energy barrier towards 4-NP reduction In the experiment, the researchers used many compounds, for example, 3-Hydroxy-6-methyl-2-nitropyridine (cas: 15128-90-2Computed Properties of C6H6N2O3).

3-Hydroxy-6-methyl-2-nitropyridine (cas: 15128-90-2) belongs to pyridine derivatives. Pyridine has a conjugated system of six 锜?electrons that are delocalized over the ring. The molecule is planar and, thus, follows the H鐪塩kel criteria for aromatic systems. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C閳ユ弻 in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Computed Properties of C6H6N2O3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem