Category: 2834-05-1

Quality Control of 11-Bromoundecanoic acid. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 11-Bromoundecanoic acid, is researched, Molecular C11H21BrO2, CAS is 2834-05-1, about Molecular Conformation in Charge Tunneling across Large-Area Junctions. Author is Du, Chuanshen; Norris, Sean R.; Thakur, Abhishek; Chen, Jiahao; VanVeller, Brett; Thuo, Martin.

Self-assembled monolayers are predicated on thermodn. equilibrium; hence, their properties project accessible relaxation pathways. Herein, we demonstrate that charge tunneling correlates with conformational degrees of freedom(s). Results from open chain and cyclic head groups show that, as expected, distribution in tunneling data correlates with the orientation of the head group, akin to the odd-even effect and more importantly the degree of conformational freedom, but fluctuates with applied bias. Trends in nature of distributions in c.d. illuminate the need for higher statistical moments in understanding these rather dynamic systems. We employ skewness, kurtosis, and estimation plots to show that the conformational degree of freedom in the head group significantly amplifies the odd-even effect and may lead to enhanced or perturbed tunneling based on whether the head group is on an odd- or even-parity spacer.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Related Products of 2834-05-1. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 11-Bromoundecanoic acid, is researched, Molecular C11H21BrO2, CAS is 2834-05-1, about Castor oil biorefinery: Conceptual process design, simulation and economic analysis. Author is Dimian, Alexandre C.; Iancu, Petrica; Plesu, Valentin; Bonet-Ruiz, Alexandra-Elena; Bonet-Ruiz, Jordi.

The paper presents the conceptual design of a castor oil biorefinery. Castor oil contains over 90% ricinoleic acid (12-hydroxy-9-octadecenoic) triglyceride, a versatile functional mol. Fatty Me ricinoleic ester (FAMRE) is the key building block. This can be valorised as biodiesel, but more profitable is making biochems., namely high-value polyamides. The goal is the conceptual design, simulation and economic anal. of a biorefinery processing 80 ktpy castor oil, equally shared between biodiesel and biochems. The process synthesis work is based on research papers and patents, supported by simulation with Aspen Plus . The biorefinery involves three plants: transesterification, pyrolysis and amination. Two innovative technologies are developed for transesterification, by heterogeneous catalysis in variable-time PFR and by homogeneous catalysis in reactive-extraction device. The reactors are simulated by employing detailed kinetics such that the ester composition fulfils the specifications set by the quality norms for biodiesel. Both methods result in compact and low energy processes, but the first delivers more valuable high-purity glycerol. FAMRE pyrolysis supplies heptanal, a valuable intermediate for specialties, and Me undecenoate, converted further to ω-aminoundecanoic acid. Energy saving of 77% is achieved by employing mech. vapor recompression. The amination is complex as chem. and processing, involving aqueous solutions and solids. The economic anal. estimates capital costs and min. product prices for 20% ROI. The performance and contribution of each process is highlighted. The bottleneck in design is the amination plant, capital-intensive and handling large amounts of process water. This stage makes necessary high equipment and energy costs but delivers a high-value monomer that boost the profitability. The result is that at equal throughput the biochems. bring 2.5 times more revenues than biodiesel. By a synergy effect, high-value biochems. sustain the profitability of commodity biodiesel, which in turn offers a broader market and secures stable revenues for farmers.

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Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Redox-responsive comparison of diselenide micelles with disulfide micelles》. Authors are Zhang, Longshuai; Liu, Yuancheng; Zhang, Kui; Chen, Yuanwei; Luo, Xianglin.The article about the compound:11-Bromoundecanoic acidcas:2834-05-1,SMILESS:O=C(O)CCCCCCCCCCBr).Application In Synthesis of 11-Bromoundecanoic acid. Through the article, more information about this compound (cas:2834-05-1) is conveyed.

Redox-responsive block copolymer micelles have been studied extensively as drug carriers. In this study, tri-block copolymers, methoxyl poly(ethylene glycol)-b-poly(ε-caprolactone)-SeSe-b-poly(ε-caprolactone)-b-methoxyl-poly(ethylene glycol) (mPEG-PCL-SeSe-PCL-mPEG) and methoxyl poly(ethyleneglyco)-b-poly(ε-caprolactone)-SS-b- poly(ε-caprolactone)-b-methoxyl-poly(ethylene glycol) (mPEG-PCL-SS-PCL-mPEG), were synthesized to investigate the redox sensitivity differences between diselenide and disulfide micelles. The changes of micelles in size and structure were investigated under conditions with glutathione (GSH) or H2O2. The results showed that the size and PDI of (mPEG-PCL-Se)2 micelles presented more significant variations under redox condition in comparison with (mPEG-PCL-S)2 micelles. The DOX released faster and more from diselenide micelles than disulfide micelles. The half maximal inhibitory concentration (IC50) of (mPEG-PCL-Se)2/DOX micelles was lower than that of (mPEG-PCL-S)2/DOX micelles against 4T1 and Hela cells. The amount of intracellular drug release from diselenide micelles was higher than from disulfide micelles in Hela cells with GSH 4.6 mM. Therefore, the (mPEG-PCL-Se)2 micelles similar to (mPEG-PCL-S)2 micelles are stimuli-responsive and may be more sensitive drug carriers.

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Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Wang, Yiqiong; Huang, Fei; Zhang, Songlin researched the compound: 11-Bromoundecanoic acid( cas:2834-05-1 ).HPLC of Formula: 2834-05-1.They published the article 《Intramolecular Cyclization of Brominated Oxime Ether Promoted with Ytterbium(0) to the Synthesis of Cyclic Imines》 about this compound( cas:2834-05-1 ) in European Journal of Organic Chemistry. Keywords: cyclic imine preparation intramol cyclization brominated oxime ether; Ytterbium catalyzed intramol cyclization brominated oxime ether. We’ll tell you more about this compound (cas:2834-05-1).

The first utility of ytterbium(0) as a mediating-metal in the intramol. cyclization of brominated oxime ether was reported in this paper. In contrast to the prior methods, the N-O bond was used as a receptor of nucleophilic reagent, rather than as a source of N-centered radicals. Cyclic imines were obtained in this one-pot reaction with a broad scope of substrates and feasible reaction conditions.

The article 《Intramolecular Cyclization of Brominated Oxime Ether Promoted with Ytterbium(0) to the Synthesis of Cyclic Imines》 also mentions many details about this compound(2834-05-1)HPLC of Formula: 2834-05-1, you can pay attention to it, because details determine success or failure

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 2834-05-1, is researched, SMILESS is O=C(O)CCCCCCCCCCBr, Molecular C11H21BrO2Journal, Materials Today Communications called A newly synthesized ionic liquid as an effective corrosion inhibitor for carbon steel in HCl medium: A combined experimental and computational studies, Author is Ozturk, Serkan; Gerengi, Husnu; Solomon, Moses M.; Gece, Gokhan; Yildirim, Ayhan; Yildiz, Mesut, the main research direction is tricationic surfactant ionic liquid steel corrosion inhibitor acid medium.Recommanded Product: 11-Bromoundecanoic acid.

Surfactants present exciting adsorption chem. due to their dual nature, i.e the present of the hydrophobic and hydrophilic parts in their structures. However, the inhibition performance of surfactants is influenced by their chem. structure as well as the nature of the electrolyte. In acidic media, high concentration of tri-cationic surfactants is required for effective surface protection. Herein, we report the synthesis of a novel tri-cationic surfactant containing three quaternized nitrogen atoms and its corrosion inhibitive effect for carbon steel in 1 M aqueous HCl medium. The mol. structure of the surfactant was elucidated by 1H NMR and 13C NMR spectroscopic techniques and its anti-corrosion activity was investigated by electrochem. impedance spectroscopy, potentiodynamic polarization and dynamic electrochem. impedance spectroscopy methods. The results obtained from the corrosion studies show that the synthesized surfactant is quite effective against the low carbon steel corrosion and at low inhibitor concentration The inhibition efficiency obtained at 5 mg/L concentration is above 90%, showing that the anti-corrosion effect of the synthesized surfactant on the metal surface is strong even at low inhibitor concentration Moreover, some physicochem. parameters namely, the critical micelle concentration, surface tension, micelle formation free energy, and emulsion stability have been calculated and used to explain the correlation with the corrosion inhibition mechanism. Addnl., to support the results from the electrochem. measurements, surface morphol. examination using energy dispersive X-ray spectroscopy (EDAX) and scanning electron microscope (SEM) methods have been performed. The EDAX and SEM results prove the adsorption of the tri-cationic surfactant mol. on the metal surface. The adsorption followed the Langmuir adsorption isotherm and calculated Kads (equilibrium constant of the adsorption process) value reflects strong interaction. More so, d. functional theory (DFT) results corroborate the exptl. results. The synthesized tri-cationic surfactant is a potential candidate for the formulation of acid corrosion inhibitor for acid cleaning applications.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 11-Bromoundecanoic acid( cas:2834-05-1 ) is researched.Formula: C11H21BrO2.Fontanesi, Claudio; Como, Enrico Da; Vanossi, Davide; Montecchi, Monica; Cannio, Maria; Mondal, Prakash Chandra; Giurlani, Walter; Innocenti, Massimo; Pasquali, Luca published the article 《Redox-Active Ferrocene grafted on H-Terminated Si(111): Electrochemical Characterization of the Charge Transport Mechanism and Dynamics》 about this compound( cas:2834-05-1 ) in Scientific Reports. Keywords: hydrogen terminated silicon ferrocene electrode charge transport mechanism. Let’s learn more about this compound (cas:2834-05-1).

Electroactive self-assembled monolayers (SAMs) bearing a ferrocene (Fc) redox couple were chem. assembled on H-terminated semiconducting degenerate-doped n-type Si(111) substrate. This allows to create a Si(111)|organic-spacer|Fc hybrid interface, where the ferrocene moiety is covalently immobilized on the silicon, via two alkyl mol. spacers of different length. Organic monolayer formation was probed by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) and XPS measurements, which were also used to estimate thickness and surface assembled monolayer (SAM) surface coverage. Atomic force microscopy (AFM) measurements allowed to ascertain surface morphol. and roughness. The single electron transfer process, between the ferrocene redox probe and the Si electrode surface, was probed by cyclic voltammetry (CV) measurements. CVs recorded at different scan rates, in the 10 to 500 mV s-1 range, allowed to determine peak-to-peak separation, half-wave potential, and charge-transfer rate constant (KET). The exptl. findings suggest that the electron transfer is a one electron quasi-reversible process. The present demonstration of surface engineering of functional redox-active organometallic mol. can be efficient in the field of mol. electronics, surface-base redox chem., opto-electronic applications.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Active mechanisorption driven by pumping cassettes, published in 2021, which mentions a compound: 2834-05-1, Name is 11-Bromoundecanoic acid, Molecular C11H21BrO2, Formula: C11H21BrO2.

Over the past century, adsorption has been investigated extensively in equilibrium systems, with a focus on the van der Waals interactions associated with physisorption and electronic interactions in the case of chemisorption. In this study, we demonstrate mechanisorption, which results from nonequilibrium pumping to form mech. bonds between the adsorbent and the adsorbate. This active mode of adsorption has been realized on surfaces of metal-organic frameworks grafted with arrays of mol. pumps. Adsorbates are transported from one well-defined compartment, the bulk, to another well-defined compartment, the interface, thereby creating large potential gradients in the form of chem. capacitors wherein energy is stored in metastable states. Mechanisorption extends, in a fundamental manner, the scope and potential of adsorption phenomena and offers a transformative approach to control chem. at surfaces and interfaces.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Mangaiyarkarasi, R.; Priyanga, M.; Santhiya, N.; Umadevi, S. published an article about the compound: 11-Bromoundecanoic acid( cas:2834-05-1,SMILESS:O=C(O)CCCCCCCCCCBr ).HPLC of Formula: 2834-05-1. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:2834-05-1) through the article.

A simple and an efficient approach for in situ preparation of palladium nanoparticles (Pd NPs) in ionic liquid crystal (ILC) microemulsion is described. Microemulsion was formed by using a ternary mixture of triton X-100/ILC/water (in the ratio of 1.4:0.1:8.5). Three such microemulsions-1, 2 and 3 were formed by using three different ILCs namely ammonium ILC containing a cholesterol core (ILC-1), imidazolium ILC bearing a cholesterol core (ILC-2) and imidazolium ILC containing a biphenyl core (ILC-3), resp. The Pd NPs were characterized using UV-vis spectroscopy, transmission electron microscopy and X-ray diffraction studies. Among the three, microemulsion-2 which was prepared using ILC-2 yielded stable NPs with an average particle size of ∼20 nm. The NPs prepared in all three emulsions were examined as catalyst for Heck reaction. The catalytic efficiency was analyzed for four cross-coupling reactions involving iodobenzene with different substituted alkenes namely Me acrylate, Et acrylate, Bu acrylate and styrene. The coupling reactions were completed in a shorter period with good yields. Further, the recyclability test of Pd NPs revealed that the particles showed good activity until third catalytic cycle. The Pd NPs prepared in microemulsion-2 showed better activity compared to those prepared in microemulsions-1 and -3.

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Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 2834-05-1, is researched, SMILESS is O=C(O)CCCCCCCCCCBr, Molecular C11H21BrO2Journal, Water, Air, & Soil Pollution called Recovery of Fuels Using the Supramolecular Gelation Ability of a Hydroxybenzoic Acid Bisamide Derivative, Author is Zapien-Castillo, Samuel; Montes-Patino, Jorge Jesus; Perez-Sanchez, Josue Francisco; Lozano-Navarro, Jessica Ismale; Melo-Banda, Jose Aaron; Mesini, Philippe J.; Diaz-Zavala, Nancy Patricia, the main research direction is hydroxybenzoic acid bisamide derivative fuel gelation.Application In Synthesis of 11-Bromoundecanoic acid.

In order to remedy the environmental pollution caused by oil spills, new materials with gelation capacity of organic solvents and fuels have been synthesized during the recent years. Among them, some of the most promising materials contain amide groups, which are often incorporated into the chem. structure of organogelators due to their effectiveness in gelling organic solvents through hydrogen bonds. A bisamide derivative of hydroxybenzoic acid (Bis-HUB1) was designed and synthesized in two steps and is able to congeal organic solvents. Gelation tests, critical gelation concentrations, and gel-sol transition temperatures were discussed in terms of its supramol. interactions. Intermol. hydrogen bonds and π-π stacking were studied through variable-temperature FTIR and UV-visible spectroscopy, while the structural characterization was performed via freeze-fracture TEM. Interestingly, Bis-HUB1 showed the ability to gel gasoline and diesel from monophasic and biphasic systems, which implies its potential use as a remediation agent in fuel spills. The results encourage further research.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Chinese Journal of Chemistry called Phase Behaviors of Multi-tailed B2AB2-Type Regio-isomeric Giant Surfactants at the Columnar-Spherical Boundary, Author is Shao, Yu; Han, Di; Yan, Xiaojin; Hou, Bo; Li, Yiwen; He, Jinlin; Fu, Qiang; Zhang, Wen-Bin, which mentions a compound: 2834-05-1, SMILESS is O=C(O)CCCCCCCCCCBr, Molecular C11H21BrO2, COA of Formula: C11H21BrO2.

We report herein the precision synthesis and phase behaviors of multi-tailed B2AB2-type regio-isomeric giant surfactants consisting of a hydrophilic polyhedral oligomeric silsesquioxane (POSS) head tethered with four hydrophobic polystyrene (PS) tails. The synthesis was accomplished through two sequential “”click”” reactions to give a series of regio-isomeric giant surfactants S2DS2 (where S is short for PS tails and D for hydroxyl-functionalized POSS) in para-, meta-, and ortho-configurations. Their phase structures and phase behaviors at the columnar-spherical boundary were investigated with a single PS tail mol. weight of 1.4 kDa. Specifically, the para- and meta-isomers show hexagonally packed cylinders phases with slightly different order-disorder transition temperatures (~120°C and ~130°C) and the ortho-isomer exhibits an order-order transition from a kinetically favored, metastable do decagonal quasi-crystal phase to a thermodynamically stable sigma phase at ~120°C, as well as a further transition into the disordered state at ~140°C. The phase diagram was constructed and their differences were rationalized based on the calculated interfacial area per mol. This work demonstrates that tiny structural disparity could not only lead to unconventional phase formation in single-component macromols., but also render dynamic and rich phase behaviors in these macromol. assemblies.

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Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI