Category: 78-50-2

Ascl, Yavuz Selim; Lalikoglu, Melisa published the article 《Development of New Hydrophobic Deep Eutectic Solvents Based on Trioctylphosphine Oxide for Reactive Extraction of Carboxylic Acids》. Keywords: deep eutectic solvent TOPO menthol reactive extraction carboxylic acid.They researched the compound: Tri-n-octylphosphine Oxide( cas:78-50-2 ).Application In Synthesis of Tri-n-octylphosphine Oxide. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:78-50-2) here.

Separation of carboxylic acids from their aqueous solutions by reactive extraction using a newly developed deep eutectic solvent (DES) was investigated. DESs were prepared using trioctylphosphine oxide (TOPO, T) and menthol (M) binary mixtures prepared in different mole ratios. 1H NMR, 31P NMR, and differential scanning calorimetry (DSC) analyses were performed to characterize the solvents that were obtained. The phys. properties of the DES formed were determined by measuring d., viscosity, and refractive index values. Extraction was carried out using the DESs with organic acids (formic, acetic, propionic, glycolic, lactic, malic, and citric acid) containing different numbers of hydroxyl and carboxyl groups. Extraction efficiency (E %) and distribution coefficient (D) values were calculated to evaluate the obtained results. Response surface methodol. was used to investigate the effects of the exptl. conditions on reactive extraction yield and to obtain model equations of the acids.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

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, Article, ChemPhysChem called Temperature and Composition Dependent Optical Properties of CdSe/CdS Dot/Rod-Based Aerogel Networks, Author is Rusch, Pascal; Pluta, Denis; Luebkemann, Franziska; Dorfs, Dirk; Zambo, Daniel; Bigall, Nadja C., which mentions a compound: 78-50-2, SMILESS is CCCCCCCCP(CCCCCCCC)(CCCCCCCC)=O, Molecular C24H51OP, HPLC of Formula: 78-50-2.

Employing nanocrystals (NCs) as building blocks of porous aerogel network structures allows the conversion of NC materials into macroscopic solid structures while conserving their unique nanoscopic properties. Understanding the interplay of the network formation and its influence on these properties like size-dependent emission is a key to apply techniques for the fabrication of novel nanocrystal aerogels. In this work, CdSe/CdS dot/rod NCs possessing two different CdSe core sizes were synthesized and converted into porous aerogel network structures. Temperature-dependent steady-state and time-resolved photoluminescence measurements were performed to expand the understanding of the optical and electronic properties of these network structures generated from these two different building blocks and correlate their optical with the structural properties. These investigations reveal the influence of network formation and aerogel production on the network-forming nanocrystals. Based on the two investigated NC building blocks and their aerogel networks, mixed network structures with various ratios of the two building blocks were produced and likewise optically characterized. Since the different building blocks show diverse optical response, this technique presents a straightforward way to color-tune the resulting networks simply by choosing the building block ratio in connection with their quantum yield.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Tri-n-octylphosphine Oxide, is researched, Molecular C24H51OP, CAS is 78-50-2, about Copper Nanocrystal Morphology That Determines the Viability of Molecular Surface Functionalization in Tuning Electrocatalytic Behavior in CO2 Reduction, the main research direction is copper nanocrystal morphol surface functionalization tuning; electrocatalysis carbon dioxide reduction.COA of Formula: C24H51OP.

Mol. surface functionalization of metallic catalysts is emerging as an ever-developing approach to tuning their catalytic performance. Here, the authors report the synthesis of hybrid catalysts comprising Cu nanocrystals (CuNCs) and an imidazolium ligand for the electrochem. CO2 reduction reaction (CO2RR). This organic modifier steers the selectivity of cubic CuNCs toward liquid products. A comparison between cubic and spherical CuNCs reveals the impact of surface reconstruction on the viability of surface functionalization schemes. Indeed, the intrinsic instability of spherical CuNCs leads to ejection of the functionalized surface atoms. Finally, also the more stable hybrid nanocrystal catalysts, which include cubic CuNCs, can be transferred into gas-flow CO2RR cells for testing under more industrially relevant conditions.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Product Details of 78-50-2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Tri-n-octylphosphine Oxide, is researched, Molecular C24H51OP, CAS is 78-50-2, about Green Emulsified Liquid Membrane for Hexavalent Chromium Extraction: Formulation and Process Optimization. Author is Anarakdim, Katia; Gutierrez, Gemma; Cambiella, Angel; Senhadji-Kebiche, Ounissa; Matos, Maria.

The influence of several formulation and operating conditions on hexavalent chromium extraction by green emulsified liquid membranes (GELMs) was studied. An excellent removal efficiency was achieved under optimized conditions. The optimum GELM formulation in terms of stability was obtained with tri-n-octylphosphine oxide (TOPO) as extractant, polyglycerol polyricinoleate (PGPR) and polyoxyethylene sorbitan monooleate (Tween 80) as stabilizers in sunflower oil. Optimum GELMs showed a monomodal distribution of sizes around 1.29μm. Results confimed that the use of a vegetable solvent and PGPR for GELM formulation is a promising alternative to petroleum organic solvents.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

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 Low-temperature synthesis of tetrapod CdSe/CdS quantum dots through a microfluidic reactor, published in 2021, which mentions a compound: 78-50-2, Name is Tri-n-octylphosphine Oxide, Molecular C24H51OP, COA of Formula: C24H51OP.

Tetrapod CdSe/CdS quantum dots (QDs) have attracted extensive research interest in light-emitting applications due to their anisotropic optical properties and large absorption cross-section. Traditional synthesis methods for tetrapod CdSe/CdS QDs usually employ fatty phosphonic acid ligands to induce the growth of wurtzite CdS arms on cubic CdSe QDs at high temperatures (350-380°C). Here, a low temperature (120°C) route was developed for the synthesis of tetrapod CdSe/CdS QDs using mixed amine ligands instead of phosphonic acid ligands. A study of the growth mechanism reveals that the amine ligands induce the orientation growth of cubic CdS arms on wurtzite CdSe QDs through a pyramid-shaped intermediate structure. The low reaction temperature facilitates the growth control of the tetrapod CdSe/CdS QDs through a microfluidic reactor. This study substantially simplifies the synthetic chem. for the anisotropic growth of CdS on CdSe QDs, paving the way for green and economic production of tetrapod CdSe/CdS QDs towards efficient light-emitting applications.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Tri-n-octylphosphine Oxide, is researched, Molecular C24H51OP, CAS is 78-50-2, about Recovery of iron from EAF smelter slags via hydrochloric acid leaching and solvent extraction using trioctyl phosphine oxide, the main research direction is trioctyl phosphine oxide iron hydrochloric acid leaching solvent extraction.Computed Properties of C24H51OP.

The recovery of iron from Elec. Arc Furnace (EAF) smelter slags via hydrochloric acid leaching and solvent extraction was investigated with a view to developing a simple hydrometallurgical route for the recovery of iron from secondary sources such as smelter slags. Slag samples obtained from a scrap iron processing plant in Ile-Ife, Nigeria was used in this study. Results from leaching tests indicated that the dissolution is chem. reaction controlled. Solvent extraction of Fe (III) from the leachate using trioctyl phosphine oxide indicated that the extraction of iron from chloride media depends on the chloride concentration and the media′s pH.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Application In Synthesis of Tri-n-octylphosphine Oxide. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Tri-n-octylphosphine Oxide, is researched, Molecular C24H51OP, CAS is 78-50-2, about Steady-state spectroscopy to single out the contact ion pair in excited-state proton transfer. Author is Grandjean, Alexander; Perez Lustres, J. Luis; Muth, Stephan; Maus, Daniel; Jung, Gregor.

Despite the outstanding relevance of proton transfer reactions, investigations of the solvent dependence on the elementary step are scarce. We present here a probe system of a pyrene-based photoacid and a phosphine oxide, which forms stable hydrogen-bonded complexes in aprotic solvents of a broad polarity range. By using a photoacid, an excited-state proton transfer (ESPT) along the hydrogen bond can be triggered by a photon and observed via fluorescence spectroscopy. Two emission bands could be identified and assigned to the complexed photoacid (CPX) and the hydrogen-bonded ion pair (HBIP) by a solvatochromism anal. based on the Lippert-Mataga model. The latter indicates that the difference in the change of the permanent dipole moment of the two species upon excitation is ~3 D. This implies a displacement of the acidic hydrogen by ~65 pm, which is in quant. agreement with a change of the hydrogen bond configuration from O-H···O to -O···H-O+.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Guleroglu, Gulhan; Unlu, Caner published the article 《Spectroscopic investigation of defect-state emission in CdSe quantum dots》. Keywords: cadmium selenide quantum dot surface defect emission; surface defect emission; two-phase synthesis method; Quantum dots.They researched the compound: Tri-n-octylphosphine Oxide( cas:78-50-2 ).Name: Tri-n-octylphosphine Oxide. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:78-50-2) here.

CdSe quantum dots are the most studied Cd-based quantum dots with their high quantum yield, high photostability, narrow emission band, and easy synthesis procedure. They are frequently used to develop light emitting diode (LED) due to their unique photophys. properties; however, their narrow emission band causes a challenge to design white LEDs because white light emission requires emission in multiple wavelengths with broad emission bands. Here in this study, we developed CdSe quantum dots with a narrow bandedge emission band and broad defect-state emission band through a modified two-phase synthesis method. Our results revealed that defect-state emission is directly linked to the surface of quantum dots and can be excited through exciting surfactant around the quantum dot. The effect of surfactant on emission properties of CdSe quantum dots diminished upon growing a shell around CdSe quantum dots; as a result, surface-dependent defect-state emission cannot be observed in gradient heterogeneous alloyed CdSxSe1 – x quantum dots.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Recommanded Product: 78-50-2. 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: Tri-n-octylphosphine Oxide, is researched, Molecular C24H51OP, CAS is 78-50-2, about Reversible sensing of nitrogen dioxide using photoluminescent CdSe/ZnS quantum dots and enhanced response by combination with noble metals. Author is Ando, Masanori; Inagaki, Kosuke; Kawasaki, Hideya; Shigeri, Yasushi.

We report here a novel, sensitive detection method for nitrogen dioxide (NO2) using thin films of CdSe/ZnS core-shell type quantum dots (QDs) with and without noble metal (NM) nanoparticles (Au, Pt, or Pt-Pd alloy) deposited on a glass substrate. The photoluminescence (PL) intensity of the QD-only film and NM-QD composite films with porous microstructure rapidly decreased on exposure to NO2 (1-100 ppm) in air, and it reversibly recovered after the atm. was changed back to air without NO2. Interestingly, the Au-QD, Pt-QD, and Pt-Pd-QD films showed higher sensitivity when compared with the QD-only film. The reversible responses of QD-only film, Au-QD film, Pt-QD film, and Pt-Pd-QD film to NO2 in air suggested that the CdSe/ZnS QD film and NM-QD films could be promising PL-based optical NO2 sensors. Furthermore, the high NO2 sensitivity, but low ozone sensitivity, in the Pt-Pd-QD film suggests the possibility of recognizing these two oxidizing gases by using the gas-selective catalytic activity of Pd.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

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.Weerathunga, Helapiyumi; Tang, Cheng; Brock, Aidan J.; Sarina, Sarina; Wang, Tony; Liu, Qiong; Zhu, Huai-Yong; Du, Aijun; Waclawik, Eric R. researched the compound: Tri-n-octylphosphine Oxide( cas:78-50-2 ).Name: Tri-n-octylphosphine Oxide.They published the article 《Nanostructure Shape-Effects in ZnO heterogeneous photocatalysis》 about this compound( cas:78-50-2 ) in Journal of Colloid and Interface Science. Keywords: zinc oxide nanostructure heterogeneous photocatalysis shape effects; Benzyl alcohol oxidation; Facet-dependent catalysis; Photocatalyst; Zinc oxide. We’ll tell you more about this compound (cas:78-50-2).

Selective oxidation of alcs. is an essential reaction for fine chem. production Here, the photocatalytic oxidation of benzyl alc. by zinc oxide (ZnO) nanocrystals was investigated to clarify the mechanism of selective oxidation with this process. Reactivity when in contact with three distinct ZnO nanocrystal shapes: nanocones, nanorods and nanoplates, was studied in order to compare crystal facet-specific effects in the reaction system. The same non-hydrothermal and non-hydrolytic aminolysis method was used to synthesize all three nanocrystal shapes. The ZnO catalysts were characterized using by a range of techniques to establish the key properties of the prominent ZnO crystal facets exposed to the reaction medium. The ZnO nanocrystals photocatalyzed the benzyl alc. oxidation reaction when irradiated by a 370 – 375 nm LED output and each ZnO crystal morphol. exhibited different reaction kinetics for the oxidation reaction. ZnO nanocones displayed the highest benzyl alc. conversion rate while nanorods gave the lowest. This established a facet-dependent kinetic activity for the benzyl alc. reaction of (1011) > (0001) > (1010). Exptl. and d. functional theory computation results confirm that the {1011} facet is a surface that exposes undercoordinated O atoms to the reaction medium, which explains why the reactant benzyl alc. adsorption on this facet is the highest. Light irradiation can excite valence band electrons to the conduction band, which are then captured by O2 mols. to yield superoxide (O2·-). In a non-aqueous solvent, the photogenerated holes oxidise benzyl alc. to form a radical species, which reacts with O2·- to yield benzaldehyde. This results in 100% product selectivity for benzaldehyde, rather than the carboxylic acid derivative

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method