Category: 104-73-4

Homogeneous epoxidation of lipophilic alkenes by aqueous hydrogen peroxide: catalysis of a Keggin-type phosphotungstate-functionalized ionic liquid in amphipathic ionic liquid solution was written by Wang, Sa-Sa;Liu, Wei;Wan, Qing-Xia;Liu, Ye. And the article was included in Green Chemistry in 2009.Formula: C17H30BrN This article mentions the following:

The ionic liquid compositions (ILC) composed of the Keggin-type phosphotungstate-functionalized ionic liquid of [Dopy]₃[PW₁₂O₄₀] and the amphipathic IL mixture of [Bpy]BF₄ and [Dopy]BF₄, were constructed as an effective catalytic system and ideal reaction medium for alkene epoxidation by aqueous H₂O₂, in which the real homogeneous catalysis was fulfilled with advantages of high activity, simplified work-up and available recyclability. The designing concept of the ILC and the IL effect on the activity/stability were discussed herein. 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. 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. Formula: C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Interaction between nonpolar surfaces in solutions of cationic and nonionic surfactant mixtures was written by Ivanova, N. I.;Parfenova, A. M.;Amelina, E. A.. And the article was included in Vestnik Moskovskogo Universiteta, Seriya 2: Khimiya in 2007.Computed Properties of C17H30BrN This article mentions the following:

The influence of the concentration of cationic (dodecylpyridinium bromide) and nonionic (Triton X-100) surfactants on the interaction energy between hydrophobic silica particles in aqueous solutions was investigated. It is shown that the effect of synergism in mixed surfactant solutions manifests in a reduction of the surfactant concentration required to reach a given interaction energy in comparison to the concentration required to reach the same interaction energy in solutions of individual surfactants. The parameters of interaction between surfactant mols. in their mixtures were calculated based the Rosen model. Chain-chain interactions between nonionic and cationic surfactants are assumed to be the main reason for the observed synergism. 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 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 C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Effects of Chain Length and Electrolyte on the Adsorption of n-Alkylpyridinium Bromide Surfactants at Sand-Water Interfaces was written by Paria, Santanu;Yuet, Pak K.. And the article was included in Industrial & Engineering Chemistry Research in 2006.Application of 104-73-4 This article mentions the following:

The kinetic and equilibrium studies of the adsorption of four cationic surfactants (pyridinium bromide) with different chain lengths (C₁₆, C₁₄, C₁₂, and C₁₀) onto sand are presented here. The adsorption and desorption behavior in the absence and presence of different electrolytes (NaCl, CaCl₂, and Na₂SO₄) are compared in batch and continuous column experiments The kinetic studies show that the rates of adsorption of pyridinium bromide surfactants on sand surfaces are very high (閳?0% of saturation adsorption occurs in 30 s) and are almost the same at low concentration (0.5 mM) for different chain lengths. The amount of surfactant adsorbed is enhanced by the presence of electrolyte because of a reduction in electrostatic repulsion among the headgroups, whereas the effect of the valence of coion does not appear to be important. Desorption studies based on column experiments show that a lower amount of surfactant is retained when eluted with electrolyte solution instead of pure water. 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. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Application of 104-73-4

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

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

Effect of some pyridinium based compounds on the hydrolysis of carboxylate ester was written by Singh, Namrata;Ghosh, Kallol K.;Marek, Jan;Kuca, Kamil. And the article was included in Indian Journal of Chemistry in 2012.Quality Control of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

Nucleophilic reactivity of some pyridinium based compounds towards hydrolysis of p-nitrophenyl acetate (PNPA) has been studied at pH 9.0 and temperature 27鎺矯. The nucleophilic reactivity of newly synthesized pyridinium compounds has been compared with com. available pyridinium based compounds such as pralidoxime and dodecylpyridinium bromide. It has been observed that with an increase in the concentration of these compounds there is an increase in the first order rate constant of the reaction. The apparent acid dissociation constant (pK_a) of some compounds have also been determined spectrophotometrically. Oximate ions released from 3-hydroxyiminomethyl-1-dodecylpyridinium bromide (3-HIDDPB) and pralidoxime have proved to be better nucleophilic agents for cleavage of carboxylate ester. Present investigation explores the structure-activity relationship of some pyridinium based compounds with same alkyl tail length. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Quality Control of 1-Dodecylpyridin-1-ium bromide).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) 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. 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. Quality Control of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Study of polyelectrolyte-ionic surfactant interactions was written by Barany, Sandor;Bader, Imre;Pakhar, Tatyana. And the article was included in Magyar Kemiai Folyoirat in 2002.Quality Control of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

Using viscosity, elec. conductivity, light transmittance and electrophoresis methods, the interactions between cationic/anionic polyelectrolytes of different charge d. and mol. mass and ionic surfactants in aqueous and electrolyte solutions were studied. Strong interactions between components are observed due to electrostatic attraction between oppositely charged polymers and surfactants, which are manifested by a substantial reduction of solution viscosity and light transmittance as well as by a relative decease in conductivity of the systems. With increasing the surfactant content, the formed polyelectrolyte-tenside complexes precipitate and then dissolve again. For highly charged polyelectrolytes a wide destabilization zone is observed and at high surfactant concentrations only partial dissolution of insoluble complexes takes place. In this region the ratio between charges of surfactant and polyelectrolyte reaches 3-4. With increasing the C atom numbers in the surfactant mol., the concentration of the surfactant at which reduction in system viscosity and light transmittance occurs diminishes. This is an evidence of the important role of hydrophobic interactions in binding and cooperation between adsorbed surfactant mols. As a result of operation of these forces also interactions between high mol. anionic polyelectrolytes and anionic surfactants take place. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Quality Control of 1-Dodecylpyridin-1-ium bromide).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ璺痬ol閳? in pyridine vs. 150 kJ璺痬ol閳? in benzene). Pyridine derivatives are also useful as small-molecule 浼?helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Quality Control of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ultrastructure of the dentin-adhesive interface after acid-base challenge. was written by Tsuchiya, Satoko;Nikaido, Toru;Sonoda, Hidekazu;Foxton, Richard M;Tagami, Junji. And the article was included in The journal of adhesive dentistry in 2004.Formula: C17H30BrN This article mentions the following:

PURPOSE: To observe the ultrastructure of the dentin-adhesive interface after in vitro sequential challenge by acidic and basic chemicals around adhesive restorations. MATERIALS AND METHODS: Box-shaped cavities were prepared in bovine root dentin and restored as follows: Reactmer Bond and Reactmer Paste (RB/RP), Clearfil SE Bond and Clearfil AP-X (SE/APX), ABF (experimental) and APX (ABF/APX), Single Bond and APX (SB/APX). After the specimens were stored in water for 1 week, the integrity of the bonds tested by sequential immersion were placed in an artificial demineralizing solution (pH 4.5) for 20 min and in 5% NaOCl for 20 min. The specimens were sectioned, polished, then argon-ion etched for 7 min, and gold sputter coated for SEM examination of the dentin-adhesive interface. RESULTS: The morphological results indicated tight bonding between the cavity wall dentin and the adhesive. For the fluoride-releasing restoration, RB/RP, a thick acid-resistant zone was clearly observed adjacent to the restoration; however, the bonding resin, RB, was partially degraded by the acid-base challenge. For SE/APX, ABF/APX and SB/APX, the bonding resins were resistant to the acid-base challenge. With the self-etching adhesive systems, SE and ABF, a thin band of acid-base resistant dentin less than 1 microm thick was observed beneath the hybrid layer. With the wet bonding system, SB, the hybrid layer was partially degraded by the acid-base challenge. CONCLUSION: SEM observation is useful for observing the reactions of adhesives to acid-base challenge. Prevention of secondary caries around a restoration may be influenced by the physical properties of the restorative and adhesive materials, quality of the hybrid layer, and fluoride-release. 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. 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, 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. Formula: C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Modeling of the Effects of Ion Specificity on the Onset and Growth of Ionic Micelles in a Solution of Simple Salts was written by Koroleva, Sofia V.;Victorov, Alexey I.. And the article was included in Langmuir in 2014.Reference of 104-73-4 This article mentions the following:

A mol. thermodn. model has been developed that takes into account the effect of ion specificity on the free energy of aggregation. The specificity of salt is reflected by differences in the bare ionic sizes and polarizabilities leading to the difference in the dispersion interaction of ions with the aggregate. The model also contains parameters that characterize the compactness of ionic pairs formed between a mobile ion and surfactant’s headgroup. The values of these parameters show that more chaotropic heads form tighter pairs with chaotropic ions whereas more cosmotropic heads form more compact pairs with cosmotropic ions. The formation of compact pairs in the micelle corona diminishes the preferable curvature of the aggregates and promotes their growth. The model has been applied to aqueous solutions of cationic (alkyltrimethylammonium, alkyldimethylammonium, and alkylpyridinium) and anionic (alkylsulfate and alkylcarboxylate) surfactants in the presence of simple 1:1 salts. With a single set of parameter values, the model reproduces the critical micelle concentration-salinity curves and the sphere-to-rod transitions or the absence of thereof and describes the aggregate growth for different simple salts, in good agreement with experiment In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Reference 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. 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.Reference of 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Interactions between quaternary ammonium surfactants and polyethylenimine at high pH in film forming systems was written by Jaber, Robben;Wasbrough, Matthew J.;Holdaway, James A.;Edler, Karen J.. And the article was included in Journal of Colloid and Interface Science in 2015.Application of 104-73-4 This article mentions the following:

Film formation and film structure in films formed on solutions of cationic surfactants with polyethylenimine is affected by the surfactant structure, including both the tail length and the nature of the headgroup, which alter the micelle properties. A series of cationic surfactants were synthesized and conductivity measurements were used to compare the critical micelle concentrations for these surfactants and their behavior with and without polyethylenimine at high pH. Small angle neutron scattering measurements were used to characterize the size and shape of the micelles in the presence and absence of the polymer. Film formation between polyethylenimine and the various surfactants was trialled, and the interfacial film structures measured using neutron reflectivity. Film formation is shown to depend on surfactant tail length, with thicker films forming for surfactants with longer hydrophobic tails. The surfactant headgroup structure affects counterion binding to the micelles, and in the case of the aromatic headgroups, the headgroup affects the extent of micellar growth when polymer is added. Films with the greatest mesostructural ordering were grown using hexadecylpyridinium bromide 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. 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, 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. Application of 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem