Tag: 300-400

Synthesis and exfoliation of alkyl-pyridinium/Bi2212 nanohybrids was written by Iwasaki, M.;Enomoto, H.;Ozaki, H.;Lerner, M. M.. And the article was included in Journal of Physics: Conference Series in 2009.Computed Properties of C17H30BrN This article mentions the following:

Nanohybrids of superconducting Bi₂Sr₂CaCu₂O_8+d (Bi2212) with alkyl-pyridinium salts were synthesized by a stepwise intercalation method. HgBr₂ was intercalated into Bi2212 crystal to prepare a precursor before intercalation of alkyl-pyridinium ions. Alkyl-pyridinium (Py-C_nH_2n+1, where Py = pyridine and n = 4, 12 and 16) was adopted as guest intercalants. Nanohybrids were characterized by X-ray powder diffraction. It is found that the gallery height of Bi2212 host is expanded from 3.07 nm to 8.69 nm (Δc = 5.61 nm) in Py-C₁₆H₃₃/Bi2212. We were successful in preparing transparent colloid of Py-C₁₆H₃₃/Bi2212 nanohybrid in organic solvent. This colloid is found to be stable for 6 days. Ultrathin films assembled by the layer-by-layer technique from Bi2212 colloids with a cationic polymer were fabricated. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Computed Properties of C17H30BrN).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Computed Properties of C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

A Tetradentate Phosphonate Ligand-based Ni-MOF as a Support for Designing High-performance Proton-conducting Materials was written by Chakraborty, Debabrata;Ghorai, Arijit;Chowdhury, Avik;Banerjee, Susanta;Bhaumik, Asim. And the article was included in Chemistry – An Asian Journal in 2021.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

Developing a robust (MOF) which facilitates proton hopping along the pore channels is very demanding in the context of fabricating an efficient proton-conducting membrane for fuel cells. Herein, we report the synthesis of a novel tetradentate aromatic phosphonate ligand H8L (L=tetraphenylethylene tetraphosphonic acid) based Ni-MOF, whose crystal structure has been solved from single-crystal X-ray diffraction. Ni-MOF [Ni₂(H₄L)(H₂O)₉(C₂H₇SO)(C₂H₇NCO)] displays a monoclinic crystal structure with a space group of P 2₁/c, a=11.887 Å, b=34.148 Å, c=11.131 Å, α = γ =90°, γ =103.374°, where a nickel-hexahydrate moiety located inside the void space of the framework through several H-bonding interactions. Upon treatment of the Ni-MOF in different pH media as well as solvents, the framework remained unaltered, suggesting the presence of strong H-bonding interactions in the framework. High framework stability of Ni-MOF bearing H-bonding interactions motivated us to explore this metal-organic framework material as proton-conducting medium after external proton doping. Due to the presence of a large number of H-bonding interactions and the presence of water mols. in the framework we have carried out the doping of organic p-toluenesulfonic acid (PTSA) and inorganic sulfuric acid (SA) in this Ni-MOF and observed high proton conductivity of 5.28×10^-2 S cm^-1 at 90 °C and 98% relative humidity for the SA-doped material. Enhancement of proton conductivity by proton doping under humid conditions suggested a very promising feature of this Ni-MOF. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Application In Synthesis of 1-Dodecylpyridin-1-ium bromide).

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. 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.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of pyridinium ionic liquids in extraction of total flavonoids from seabuckthorn leaves was written by Zhao, San-hu;Wang, Ming-shan;Qiao, Yong-sheng;Dong, Zhi-yun;Liu, Gai-mei. And the article was included in Huaxue Shiji in 2018.Formula: C17H30BrN This article mentions the following:

In this work, six kinds of pyridinium ionic liquids were prepared and their aqueous solution was applied in extraction total flavonoids from seabuckthorn leaves. The results showed that using 1 mol/L aqueous solution of N-dodecyl pyridinium bromide as the extraction agent to extract the total flavonoids from the seabuckthorn leaves dried naturally, under the microwave irradiation at 50°C, the extraction rate 3.65% was obtained after 5 min. Based on the method of pharmacopoeia, using ethanol as extraction agent, the extraction rate was only 2.72% after 3 h. So the microwave-assisted extraction total flavonoid with pyridinium ionic liquids as extraction agents is an efficient and convenient method. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Formula: C17H30BrN).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. 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.Formula: C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The marine mammal class II major histocompatibility complex organization was written by de Sa, Andre Luiz Alves;Breaux, Breanna;Burlamaqui, Tiberio Cesar Tortola;Deiss, Thaddeus Charles;Sena, Leonardo;Criscitiello, Michael Frederick;Schneider, Maria Paula Cruz. And the article was included in Frontiers in Immunology in 2019.Safety of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

This study aims to characterize the organization of the marine mammal class II MHC using publicly available genomes. We located class II sequences in the genomes of one sirenian, four pinnipeds and eight cetaceans using NCBI-BLAST and reannotated the sequences using local BLAST search with exon and intron libraries. The manatee class II region shares overall synteny with other mammals, however most DR loci were translocated from the canonical location, past the extended class II region. Detailed anal. of the genomes of closely related taxa revealed that this presumed translocation is shared with all other living afrotherians. Other presumptive chromosome rearrangements in Afrotheria are the deletion of DQ loci in Afrosoricida and deletion of DP in E. telfairi. All cetaceans share the Cetartiodactyla inversion separating class II genes into two subregions: class IIa, with DR and DQ genes, and class IIb, with non-classic genes and a DRB pseudogene. These results point to three distinct and unheralded class II MHC structures in marine mammals: one canonical organization but lacking DP genes in pinnipeds; one bearing an inversion separating IIa and IIb subregions lacking DP genes found in cetaceans; and one with a translocation separating the most diverse class II gene from the MHC found in afrotherians and presumptive functional DR, DQ, and DP genes. Future functional research will reveal how these aquatic mammals cope with pathogen pressures with these divergent MHC organizations. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Safety of 1-Dodecylpyridin-1-ium bromide).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Safety of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Sodium triflate decreases interaggregate repulsion and induces phase separation in cationic micelles was written by Lima, Filipe S.;Cuccovia, Iolanda M.;Buchner, Richard;Antunes, Filipe E.;Lindman, Bjorn;Miguel, Maria G.;Horinek, Dominik;Chaimovich, Hernan. And the article was included in Langmuir in 2015.Category: pyridine-derivatives This article mentions the following:

Dodecyltrimethylammonium triflate (DTATf) micelles possess lower degree of counterion dissociation (α), lower hydration, and higher packing of monomers than other micelles of similar structure. Addition of sodium triflate ([NaTf] > 0.05 M) to DTATf solutions promotes phase separation This phenomenon is commonly observed in oppositely charged surfactant mixtures, but it is rare for ionic surfactants and relatively simple counterions. While the properties of DTATf have already been reported, the driving forces for the observed phase separation with added salt remain unclear. Thus, we propose an interpretation for the observed phase separation in cationic surfactant solutions Addition of up to 0.03 M NaTf to micellar DTATf solutions led to a limited increase of the aggregation number, to interface dehydration, and to a progressive decrease in α. The viscosity of DTATf solutions of higher concentration ([DTATf] ≥ 0.06 M) reached a maximum with increasing [NaTf], though the aggregation number slightly increased, and no shape change occurred. We hypothesize that this maximum results from a decrease in interaggregate repulsion, as a consequence of increased ion binding. This reduction in micellar repulsion without simultaneous infinite micellar growth is, probably, the major driving force for phase separation at higher [NaTf]. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Category: pyridine-derivatives).

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. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ionic liquids – reaction media and catalysts for synthesis of 1,4-dihydropyridines was written by Zicmanis, A.;Hinica, A.;Pavlovica, S.;Klavins, M.. And the article was included in Latvijas Kimijas Zurnals in 2009.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

Ionic liquids (ILs) were evaluated as tunable solvents for the Hantzsch synthesis of 1,4-dihydropyridines (DHP) from 1,3-dicarbonyl compounds and hexamethylenetetramine. Structure changes of both cations and anions in ionic liquids allow design of the most suitable structure for the particular DHP synthesis. Increasing the hydrophobicity of the cation in the IL results in decreased yield of DHP; aromatic and aliphatic cations show similar performance; aromatic anions are slightly better than aliphatic ones; and more nucleophilic anions provide higher yield than other anions. Addition of buffer substances to the reaction mixture has a clearly pos. impact on the yield of DHP. Increased temperature results in higher yields of DHP. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Application In Synthesis of 1-Dodecylpyridin-1-ium bromide).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) 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. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem