Tag: M.W=150-200

Xing, Hongjie published the artcileUltrasound-assisted synthesized BiFeO₃ as FeOH⁺ promoted peroxymonosulfate activator for highly efficient degradation of tetracycline, Application In Synthesis of 826-36-8, the publication is Journal of Alloys and Compounds (2021), 157281, database is CAplus.

A multiferroic BiFeO3 (BFO) catalyst was fabricated through a mild one-pot hydrothermal process with a bath-ultrasound assisted dissolution of Fe(NO3)3·9H2O for 30 min. X-ray photoemission spectroscopy revealed that the BFO (BFO-u) catalyst with US assisted dissolution of Fe(NO3)3·9H2O in the synthetic process exhibited high Fe2+ and OH- levels, which could be explained to be Fe3+ + H2O → Fe2+ + H+ + •OH. As a result, BFO-u catalyst activated potassium peroxymonosulfate (PMS) efficiently for degrading tetracycline hydrochloride. In particular, visible-light assisted activation of PMS over BFO-u catalyst exhibited the highest degradation rate constant, at 0.352 min-1. Species-trapping experiments revealed that the presence of PMS promoted the generation of •OH, •O-2 and 1O2 that all participated in degrading TCH, in which 1O2 was primarily contributed to the degradation Also, BFO-u catalyst was stable and recyclable and thus suitable for practical applications.

Journal of Alloys and Compounds published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C13H19Br2ClN2O, Application In Synthesis of 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Thomas, Aleena published the artcileTrichloroacetic acid fueled practical amine purifications, Quality Control of 826-36-8, the publication is Beilstein Journal of Organic Chemistry (2022), 225-231, database is CAplus and MEDLINE.

On out of equilibrium mol. machinery, using trichloroacetic acid (TCA), disclosed a purification technique considerably decreasing the number of operations and the waste generation required for such purifications. At first, TCA triggered the precipitation of the amines through their protonated salt formation, enabling the separation with the impurities. From these amine salts, simple decarboxylation of TCA liberated volatile CO₂ and chloroform afforded directly the pure amines. Through this approach, a broad range of diversely substituted amines were isolated with success.

Beilstein Journal of Organic Chemistry published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C13H26N2, Quality Control of 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Mohd Sarofil, Anith Dzhanxinah published the artcileToad egg-like bismuth nanoparticles encapsulated in an N-doped carbon microrod via supercritical acetone as anodes in lithium-ion batteries, Computed Properties of 826-36-8, the publication is Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) (2022), 128-141, database is CAplus.

A toad egg-inspired structure comprising bismuth (Bi) nanoparticles (NPs) contained in a carbon microrod shell (Bi@C) was synthesized via the one-pot supercritical acetone (scAct) route and subsequent carbonization. During the formation of Bi NPs in scAct in the presence of nitric acid, a few decomposed acetone mols. acted as carbon sources, which generated an albumen-like N-doped carbon microrod with an average shell thickness of 38 nm and were embedded with yolk-like Bi NPs having size in the range of 30-200 nm. The densely packed Bi NPs inside the carbon micron shell resulted in a high Bi loading of 78 wt%. When utilized for Li storage, the Bi@C delivered a high reversible capacity of 337 mAh g^-1 after 70 cycles at 0.05 A g^-1, long-term cyclability of 0.04 decay per cycle for 1000 cycles at 1 A g^-1, and high volumetric energy d. of 870 mAh cm^-3. The use of a mixed ether- and ester-based electrolyte in the Bi@C cell reduced the resistivity and increased the capacitive contribution, thereby resulting in a better high-rate performance and long-term stability than those obtained using conventional ester-based electrolytes.

Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Computed Properties of 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Yang, Xianglong published the artcileSuperoxide anion and singlet oxygen dominated faster photocatalytic elimination of nitric oxide over defective bismuth molybdates heterojunctions, Quality Control of 826-36-8, the publication is Journal of Colloid and Interface Science (2022), 248-258, database is CAplus and MEDLINE.

Establishing an ideal photocatalytic system with efficient reactive oxygen species (ROS) generation has been regarded as the linchpin for realizing efficient nitric oxide (NO) removal and unveiling the ROS-mediated mechanism. In this work, a novel oxygen-deficient 0D/1D Bi_3.64Mo_0.36O_6.55/Bi₂MoO₆ heterojunctions (BMO-12-H) were successfully synthesized under the enlightenment of clarified crystal growth mechanism of bismuth molybdates. Because of the synergies between defect-engineering and heterojunction-construction, BMO-12-H demonstrated improved photoelectrochem. properties and O₂ adsorption capacity, which in turn facilitated the ROS generation and conversion. The enhancement of •O_-2 and ¹O₂ endowed BMO-12-H with strengthened NO removal efficiency (59%) with a rate constant of 12.6*10^-2 min^-1. A conceivable NO removal mechanism dominated by •O_-2 and ¹O₂ was proposed and verified based on the theor. calculations and in-situ IR spectroscopy tests, where hazardous NO was oxidized following two different exothermic pathways: the •O_-2-induced NO → NO_-3 process and the ¹O₂-induced NO → NO₂ → NO_-3 process. This work offers a basic guideline for accelerating ROS generation by integrating defect-engineering and heterojunction-construction, and provides new insights into the mechanism of efficient NO removal dominated by •O_-2 and ¹O₂.

Journal of Colloid and Interface Science published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C10H10CoF6P, Quality Control of 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Wang, Xiaolei published the artcileEfficient activation of peroxymonosulfate by copper sulfide for diethyl phthalate degradation: Performance, radical generation and mechanism, HPLC of Formula: 826-36-8, the publication is Science of the Total Environment (2020), 142387, database is CAplus and MEDLINE.

Copper-containing minerals have been extensively used in Fenton-like processes for degradation of pollutants and have exhibited great potential for environmental remediation. This work reports the first use of copper sulfide (CuS), a typical Cu-mineral, for the activation of peroxymonosulfate (PMS) for pollutant degradation; the study also elucidates the underlying mechanism of these processes. Copper sulfide effectively activated PMS to degrade di-Et phthalate (DEP). ESR, free radical quenching, XPS, X-ray diffraction analyses and DFT calculations confirmed that Ξ Cu (I)/ ΞCu (II) cycling on the surface of CuS provided the main pathway to activate PMS to produce highly oxidative species. Unlike conventional sulfate radical-based PMS activation processes, hydroxyl radical (·OH) were found to be the dominant radical in the tested CuS/PMS system, which performed more efficiently than an alternative ·OH-based oxidation system (CuS/H₂O₂) for DEP degradation In addition, the presence of anions such Cl- and NO^-3 has limited inhibition effects on DEP degradation Overall, this study provides an efficient pathway for PMS-based environmental remediation as well as a new insight into the mechanism of PMS activation by Cu-containing minerals.

Science of the Total Environment published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C6H10O7, HPLC of Formula: 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Tanaka, Susumu published the artcileHighly Efficient Singlet Oxygen Generation and High Oxidation Resistance Enhanced by Arsole-Polymer-Based Photosensitizer: Application as a Recyclable Photooxidation Catalyst, Related Products of piperidines, the publication is Macromolecules (Washington, DC, United States) (2020), 53(6), 2006-2013, database is CAplus.

Photosensitizers have attracted considerable attention in various fields such as organic synthesis and medical care. For the development of high-performance photosensitizers, highly efficient and persistent singlet oxygen generators (¹O₂) having a high oxidation tolerance are strongly required. This study presents a detailed investigation of dithieno[3,2-b:2′,3′-d]arsole-fluorene copolymer for its ¹O₂ generation ability and application as a photooxidation catalyst in vital organic reactions. Photoirradiation of an air-saturated solution of the polymer generates ¹O₂, which was detected by ¹O₂ scavengers such as dihydronaphthoquinone and diphenylisobenzofuran. The polymer photosensitizer was completely stable in the presence of the strong oxidant ¹O₂. The photosensitizer showed the highest quantum yield of ¹O₂ generation (Φ = 0.54) in single-component main-chain type π-conjugated polymers. The quantum yield of the arsenic-free analog of the polymer-bithiophene-fluorene copolymer-was significantly lower (Φ = 0.14), suggesting that the heavy-atom effect of arsenic can improve the efficiency of intersystem crossing (ISC) from the singlet excited state to the triplet excited state of the photosensitizer. In addition, when utilized as a recyclable photocatalyst for the oxidation reaction, the photosensitizer exhibited excellent oxidation resistance without losing its recognizable catalytic activity. Finally, we demonstrated the release of ¹O₂ into the air by a film of the present polymer. Persistent ¹O₂ generation was observed on film irradiation without polymer decomposition These results suggested that the polymer exhibited excellent oxidation resistance in solution as well as in the solid state. The present mol. design concept of the photosensitizer using the main group element can facilitate the development of further functional optical materials.

Macromolecules (Washington, DC, United States) published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C12H15NO, Related Products of piperidines.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Martinez Porcel, Joaquin E. published the artcilePlasmonic silica-gold core-shell nanoparticles: Interaction with organic dyes for light-induced applications, Application of 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2022), 114016, database is CAplus.

The interaction of plasmonic nanoparticles with ground- and excited states of dyes can strongly affect the fluorescence of the organic mols., as well as the generation of reactive oxygen species (ROS). This interaction can be exploited in bioimaging and photodynamic therapy (PDT) of tumors. In this line, we prepare here gold-decorated silica nanoparticles (SiO₂@Au NPs) via a novel method, which combines the synthesis of gold nuclei through reduction of a Au³⁺ salt, with a photochem. route driving the growth of the metallic nuclei. In this hybrid nanomaterial, the surface groups of the silica particle can potentially act as adsorption sites for the dyes in a range close to the gold nanoparticles, favoring the interaction. The ability of SiO₂@Au NPs to enhance fluorescence and generation of ROS upon irradiation of riboflavin and Rose Bengal is evaluated. SiO₂@Au enhance the fluorescence emission of both dyes, although through different mechanisms. The excitation of the flavin is enhanced, whereas for Rose Bengal the radiative decay rate is increased by the nanoparticles. For neither of the two dyes, SiO₂@Au affect ROS generation as measured by ESR (EPR) spectroscopy. However, the increase in fluorescence emission observed for both dyes demonstrates the potential application of SiO₂@Au in fluorescence-sensing methods and bioimaging.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Application of 2,2,6,6-Tetramethylpiperidin-4-one.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Ye, Jian published the artcileInvestigation of catalytic self-cleaning process of multiple active species decorated macroporous PVDF membranes through peroxymonosulfate activation, Computed Properties of 826-36-8, the publication is Journal of Colloid and Interface Science (2021), 178-189, database is CAplus and MEDLINE.

Currently, carbon-based catalysts integrated with macroporous catalytic membrane have aroused considerable attention for environmental remediation because of its practicability and high efficiency. Herein, nitrogen doped carbon nanotube hybrids (Fe-Co@NC-CNTs) decorated with multiple active species (Fe₃Co₇/CoFe₂O₄@Fe/Co-N-C) were designed through N-mol. assisted pyrolysis of bimetallic (Fe/Co) metal-organic frameworks, and then immobilized on poly(vinylidene fluoride) (PVDF) membrane to construct macroporous Fe-Co@NC-CNTs/PVDF catalytic membrane via directional freezing technique, where active sites were efficiently exposed for oxidants and target pollutants. As expected, Fe-Co@NC-CNTs/PVDF membrane successfully achieved almost 100% bisphenol A (BPA) degradation after 40 min via PMS activation, which was significantly overperformed the majority of conventional carbon-based catalysts. Besides, we found that Fe-Co@NC-CNTs/PVDF membrane not only exhibited ideal catalytic and self-cleaning property in humic acid (HA)-BPA coexistence system, but also maintained the excellent reusability and ultrahigh water flux (10464.45 L m^-2 h^-1) even after 5 cycles. Notably, in EPR anal. and quenching experiments, it was found that sulfate radicals (SO₄·^– and ·OH) and singlet oxygen (¹O₂) participated the degradation process while ¹O₂ made a major contribution. More significantly, this study is very meaningful for the development of novel catalytic self-cleaning membranes with PMS activation.

Journal of Colloid and Interface Science published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C10H16Br3N, Computed Properties of 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Hong, Misun published the artcileSinglet Oxygen in Lithium-Oxygen Batteries, Related Products of piperidines, the publication is Batteries & Supercaps (2021), 4(2), 286-293, database is CAplus.

A review. Singlet oxygen (¹O₂) is one of the most critical species leading to parasitic side reactions and poor reversibility in non-aqueous Li-O₂ batteries. ¹O₂ is generated via the disproportionation of the superoxide radical (O₂.-) in O₂/Li₂O₂ electrochem. The mechanistic and computational studies on ¹O₂ formation revealed the significant roles of the associated cations, solvation ability of aprotic solvents, H⁺ source, and catalyst/electrode materials. Along with efforts to alleviate ¹O₂ production, trapping and eliminating ¹O₂ have been attempted using mol. agents. Anthracene derivatives trap ¹O₂ and form endoperoxides, which can be quant. detected using in situ fluorescence anal. Phys. quenchers that convert ¹O₂ to ³O₂ are desirable for cycling of Li-O₂ cells because quencher mols. are reusable. We highlight the recent reports on the formation and elimination of ¹O₂, and challenges and perspectives of suppressing the ¹O₂ effect on the performance of Li-O₂ cells.

Batteries & Supercaps published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Related Products of piperidines.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Liang, Huazhe published the artcilePolyamidoamine Immobilized TEMPO Mediated Oxidation of Cellulose: Effect of Macromolecular Catalyst Structure on the Reaction Rate, Oxidation Degree and Degradation Degree, Application In Synthesis of 826-36-8, the publication is Fibers and Polymers (2020), 21(6), 1251-1258, database is CAplus.

A series of polyamidoamine (PAMAM) immobilized TEMPO macromol. catalysts were prepared by condensation reduction reactions between carbonyl groups in 4-O-TEMPO and primary amines in PAMAM. The macromol. catalyst and NaBr/NaClO were used as catalytic system for selective oxidation of cellulose in aqueous medium. Effects of various factors, such as TEMPO loading ratios and PAMAM generations, were studied on the catalytic performances. Compared with free TEMPO, the macromol. catalyst with less than 50% TEMPO loading ratio had a higher reaction rate in the initial stage of the reaction. Especially, the reaction rate of G1.0 PAMAM with 30% TEMPO loading ratio was comparable to free TEMPO in the whole reaction process. Its cellulose oxidation degree (or catalytic activity) was also equivalent to the level of free TEMPO. Interestingly, the cellulose depolymerization degree of macromol. catalyst was not affected by the cellulose oxidation degree and was lower than that of free TEMPO. The macromol. catalyst could be recycled efficiently by the combination of supernatant circulation and salting-out extraction, and the recycling performance was excellent.

Fibers and Polymers published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Application In Synthesis of 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem