Tag: 300-400

The Association of Picrate Ions with Amphiphilic Cations in Water and Aqueous Solutions of Nonionic Surfactant and β-Cyclodextrin was written by Ziyatdinova, A. B.;Mirsaizyanova, S. A.;Saprykova, Z. A.;Amirov, R. R.. And the article was included in Colloid Journal in 2005.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

The interaction of cetyltrimethylammonium and cetylpyridinium bromides with picrate ions in H₂O and aqueous solutions of the nonionic surfactant Brij 35 was studied by spectrophotometry. Spectral characteristics of the associates of picrate ions with long-chain N-containing cations depend on the concentration of a cationic surfactant. When β-cyclodextrin is added, these associates decompose owing to the formation of the strong inclusion complexes of the guest-host type with amphiphilic ions of a cationic surfactant or Brij 35 mols. The conclusion is made that the driving force for the formation of pre-micellar aggregates involving picrate ions is the interactions between alkyl chains of surfactant cations. In the presence of various surfactants, as β-cyclodextrin concentration increases, 1st the mols. of nonionic surfactant and then amphiphilic cations bind with the receptor cavity. There is no interaction between polyethylene glycol and β-cyclodextrin in aqueous solution 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. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electrochemically driven organic monolayer formation on silicon surfaces using alkylammonium and alkylphosphonium reagents was written by Wang, Dong;Buriak, Jillian M.. And the article was included in Surface Science in 2005.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

The functionalization of Si surfaces with organic monolayers, bound through Si-C bonds, is an area of wide interest due to the technol. promise of organosilicon hybrid devices, but also to study fundamental surface reactivity. The use of alkylammonium and alkylphosphonium cations as sources of organic moieties to bind to hydrogen-terminated flat and porous Si is demonstrated. Tetraalkylammonium, tetraalkyl/arylphosphonium reagents, and alkyl pyridinium salts can be used, but trialkylammonium salts cannot as they yield substantial surface oxidation Under electrochem. conditions, either potentiostatic or galvanostatic modes, alkyl groups derived from the NH₄⁺ or phosphonium salts are grafted to the Si surface and are bound through Si-C bonds. Covalent attachment of the organic monolayers to the surface was demonstrated by XPS, AFM scribing, and FTIR. The mechanism may proceed via reduction of the NH₄⁺ salt yielding alkyl radicals, R^•, which may be reduced to R^– and attack surface Si-Si bonds, leading to Si-C bonds, or the formation of silyl anions (≡Si^–) under the cathodic conditions followed by nucleophilic attack on the trialkylammonium cation. 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. 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.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Quaternary ammonium surfactant structure determines selective toxicity towards bacteria: mechanisms of action and clinical implications in antibacterial prophylaxis was written by Inacio, Angela S.;Domingues, Neuza S.;Nunes, Alexandra;Martins, Patricia T.;Moreno, Maria J.;Estronca, Luis M.;Fernandes, Rui;Moreno, Antonio J. M.;Borrego, Maria J.;Gomes, Joao P.;Vaz, Winchil L. C.;Vieira, Otilia V.. And the article was included in Journal of Antimicrobial Chemotherapy in 2016.Electric Literature of C17H30BrN This article mentions the following:

Broad-spectrum antimicrobial activity of quaternary ammonium surfactants (QAS) makes them attractive and cheap topical prophylactic options for sexually transmitted infections and perinatal vertically transmitted urogenital infections. Although attributed to their high affinity for biol. membranes, the mechanisms behind QAS microbicidal activity are not fully understood. The authors evaluated how QAS structure affects antimicrobial activity and whether this can be exploited for use in prophylaxis of bacterial infections. Acute toxicity of QAS to in vitro models of human epithelial cells and bacteria were compared to identify selective and potent bactericidal agents. Bacterial cell viability, membrane integrity, cell cycle and metabolism were evaluated to establish the mechanisms involved in selective toxicity of QAS. QAS toxicity normalized relative to surfactant critical micelle concentration showed n-dodecylpyridinium bromide (C12PB) to be the most effective, with a therapeutic index of ∼10 for an MDR strain of Escherichia coli and >20 for Neisseria gonorrhoeae after 1 h of exposure. Three modes of QAS antibacterial action were identified: impairment of bacterial energetics and cell division at low concentrations; membrane permeabilization and electron transport inhibition at intermediate doses; and disruption of bacterial membranes and cell lysis at concentrations close to the critical micelle concentration In contrast, toxicity to mammalian cells occurs at higher concentrations and, as the authors previously reported, results primarily from mitochondrial dysfunction and apoptotic cell death. Thus, short chain (C₁₂) n-alkyl pyridinium bromides have a sufficiently large therapeutic window to be good microbicide candidates. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Electric Literature of C17H30BrN).

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·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). 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. Electric Literature of C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Solubilization of a water-insoluble dye in aqueous NaBr solutions of alkylpyridinium bromides and its relation to micellar size and shape was written by Fujio, Katsuhiko;Mitsui, Tsunehiro;Kurumizawa, Hiroshi;Tanaka, Yoshikazu;Uzu, Yuhei. And the article was included in Colloid and Polymer Science in 2004.COA of Formula: C17H30BrN This article mentions the following:

To investigate the effect of added salt on micelle size, shape, and structure the solubilization of Orange OT in aqueous NaBr solutions of decylpyridinium bromide (DePB), dodecylpyridinium bromide (DPB), tetradecylpyridinium bromide (TPB), and hexadecylpyridinium bromide (CPB) was examined The solubilization powers of DePB and DPB micelles increase with increasing NaBr concentration up to 2.86 and 3.07 mol dm^-3, resp., but above these concentrations remain unaltered. This suggests that spherical micelles of DePB and DPB can have a maximum and constant size at NaBr concentrations higher than these threshold concentrations On the other hand, the solubilization powers of TPB and CPB micelles increase in the whole range of NaBr concentration studied. The dependencies of the solubilization powers of their micelles on the counterion concentration change at 0.10 and 0.03 mol dm^-3 NaBr, resp., as suggests that TPB and CPB micelles undergo the sphere-rod transition at those concentrations Orange OT is a more suitable probe for detecting the presence of the maximum- and constant-size spherical micelle than Sudan Red B. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4COA of Formula: C17H30BrN).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) 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. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.COA of Formula: C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Preparation of Tin Dioxide Nanoparticles by the Reverse Micelle Method: Experiment and Preliminary Calculations was written by Khalidova, M. M.;Voznesenskii, M. A.;Karpov, V. V.;Bobrysheva, N. P.;Osmolovskii, M. G.;Osmolovskaya, O. M.. And the article was included in Russian Journal of General Chemistry in 2018.Product Details of 104-73-4 This article mentions the following:

Synthetic and computational experiments were carried out to study the influence of the nature and structure of surfactants, and also of the reaction medium on the size of tin dioxide nanoparticles obtained by the reverse micelle method. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Product Details of 104-73-4).

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·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). 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.Product Details of 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electronic Communication in Confined Space Coronas of Shell-by-Shell Structured Al₂O₃ Nanoparticle Hybrids Containing Two Layers of Functional Organic Ligands was written by Stiegler, Lisa M. S.;Hirsch, Andreas. And the article was included in Chemistry – A European Journal in 2019.Formula: C17H30BrN This article mentions the following:

A first series of examples for confined space interactions of electron-rich and electron-poor mols. organized in an internal corona of shell-by-shell (SbS)-structured Al₂O₃ nanoparticle (NP) hybrids is reported. The assembly concept of the corresponding hierarchical architectures relies on both covalent grafting of phosphonic acids on the NPs surface (SAMs formation; SAM=self-assembled monolayer) and exohedral interdigitation of orthogonal amphiphiles as the second ligand layer driven by solvophobic interactions. The electronic communication between the chromophores of different electron demand, such as pyrenes, perylenediimides (PDIs; with and without pyridinium bromide headgroups) and fullerenes was promoted at the layer interface. In this work, it is demonstrated that the efficient construction principle of the bilayer hybrids assembled around the electronically “innocent” Al₂O₃ core is robust enough to achieve control over electronic communication between electron-donors and -acceptors in the interlayer region. The electronic interactions between the electron-accepting and electron-donating moieties approaching each other at the layer interface were monitored by fluorescence measurements. 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 has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. 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

Adsorption of Brij 35-dodecylpyridinium bromide mixtures at air-aqueous solution and Teflon-aqueous solution interfaces was written by Pisaev, I. V.;Soboleva, O. A.;Ivanova, N. I.. And the article was included in Colloid Journal in 2009.Electric Literature of C17H30BrN This article mentions the following:

Tensiometry, spectrophotometry, the radioactive-tracer technique, and contact angle measurements are employed to study the adsorption of mixtures of a nonionic surfactant Brij 35 and a cationic surfactant dodecylpyridinium bromide (DDPB) at interfaces between their solutions and air or Teflon. It is established that adsorption layers at both of the interfaces are enriched with Brij 35. Brij 35 adsorption on Teflon is nearly independent of the presence of DDPB. On the contrary, DDPB adsorption is enhanced in the presence of Brij 35. Neg. deviations from the ideal behavior are revealed for mixtures with small fractions of Brij 35 with respect to a decrease in the interfacial tension in air-solution and Teflon-solution systems. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Electric Literature of C17H30BrN).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Electric Literature of C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Preparation and characterization of organo-bentonites modified by different surfactants was written by Zhou, Xiaojian;Wang, Xiaozhi;Jin, Cuili;Zhao, Bin;Yan, Feng;Feng, Ke. And the article was included in Asian Journal of Chemistry in 2012.Safety of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

Clay minerals with 2:1 type structure possess prodigious area of inner-surface in silicate interlayers. Inserting surfactants into the interlayers will change the characteristics of inner-surface from hydrophilic to hydrophobic ones, which significantly enlarges the capacity of clay minerals to adsorb organic pollutants. Surfactants on the inner-surface of silicates can affect the phys. and chem. properties of the inner-surface and the dimension of interspace. The array forms of the surfactant mols. on the inner-surface of minerals may also influence adsorption capacity to a special organic pollutant. In the present study four surfactants, cetyltrimethylammonium bromide (CTMAB), cetylpyridinium bromide (CPB), dodecyltrimethylammonium bromide (DTMAB) and dodecylpyridiniumbromide (DPB) were selected for production of organo-bentonite. With burning and X-radial diffraction (XRD) the amount of surfactants adsorbed on the inner-surface of bentonite were measured and the mol. array forms of surfactants on the inner-surface of bentonite were discussed. The results were as follows: (1) all surfactants tested could be adsorbed onto the inner-surface of bentonite, which increased the distance between layers of elemental cells; (2) for surfactants with same length of carbon chain, one with pyridinium head is more easily adsorbed on the inner-surface of bentonite than that with trimethylammonium; for surfactants with same head but different length of carbon chains, the one with greater length is more easily adsorbed onto inner-surface of bentonite; (3) The possible mol. array forms of cetyltrimethylammonium bromide and cetylpyridinium bromide, which possess carbon chain with 16 carbon atoms, was assumed to be a pseudo-trilayer lying on the inner-surface of bentonite and those for dodecyltrimethylammonium bromide and dodecylpyridiniumbromide, which possess carbon chain with 12 carbon atoms, were assumed to be a tightly-combined lateral bilayer; (4) with increasing concentration of surfactants the mol. array forms of surfactants on the inner-surface of bentonite became complex: monolayer → lateral bilayer → paraffin-type monolayer → pseudo-trilayer. 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. 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. Safety of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Dissolution of n-decane in aqueous solution of individual surfactants was written by Strel’tsova, O. O.;Volyuvach, O. V.. And the article was included in Ukrainskii Khimicheskii Zhurnal (Russian Edition) in 2005.Computed Properties of C17H30BrN This article mentions the following:

The dissolution of n-decane in aqueous solutions of cationic and anionic surfactants was investigated over a broad range of their concentrations The applicability of a formal second-order reaction kinetics to the kinetics of dissolution of n-decane in aqueous solutions of surfactants was shown for pre-micellization conditions. The distribution constants of n-decane between micelles and water and the free energy of solubilization were calculated 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’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. 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.Computed Properties of C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Photometric characteristics of de-sulfonated pyrocatechol violet and its application to the photometric determination of trace amounts of mercury was written by Chen, Zhaoguo;Chen, Xi. And the article was included in Lihua Jianyan, Huaxue Fence in 2001.Computed Properties of C17H30BrN This article mentions the following:

A method for the spectrophotometric determination of Hg was presented with de-sulfonated pyrocatechol violet (DSPV). In a slightly acidic medium of pH 4.5-6.5, a stable quaternary chelate was formed by DSPV, Hg(II), KBr and DPB. The absorption maximum of the chelate was at 586 nm, the apparent molar absorptivity 9.5 × 10⁵, the detection limit 0.8 ng mL^-1, and Beer’s law obeyed at 0.02-4.00 μg/25 mL. The interference of Cd²⁺ and Pb²⁺ can be masked by thiolactic acid, and that of Sn²⁺ eliminated by H₂O₂. The results obtained by this method agreed very well with those obtained by AAS method. The method was used in the determination of trace Hg in environmental water samples and foodstuff with the relative standard deviation 9.5-13.9% and the recovery 93-116%. 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. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Computed Properties of C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem