Tag: M.W=150-200

Kim, Ji Hyeon published the artcileIsomeric sp²-C-conjugated porous organic polymer-mediated photo- and sono-catalytic detoxification of sulfur mustard simulant under ambient conditions, Application of 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Matter (2021), 4(11), 3774-3785, database is CAplus.

The development of efficient strategies for the sustainable detoxification of mustard gas simulants has longstanding demand for human safety. Here, we present for the first time a photo- and sono-catalyzed selective detoxification of mustard gas simulants under ambient conditions using conveniently prepared porous organic polymer (POP) catalysts. We developed a microwave-assisted synthesis of three isomeric tetraphenylethylene-based POPs (TP_o, TP_m, and TP_p) bearing fully sp²-hybridized carbon frameworks. Among the three isomers, TPm efficiently generated ¹O₂, whereas TP_p generated both O^.-₂ and HO. under visible light irradiation, both TP_m and TP_p efficiently generated ROS to selectively convert 2-chloroethyl Et sulfide (CEES) into nontoxic 2-chloroethyl Et sulfoxide (CEESO) in the atm. conditions, through a known conversion mechanism. TP_mand TP_p can also generate ¹O₂ under ultrasound irradiation This work provides insight into designing new POP photo- and sono-catalysts to generate ROS in widespread applications.

Matter 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

Huang, Zhiyan published the artcileDefect-rich carbon based bimetallic oxides with abundant oxygen vacancies as highly active catalysts for enhanced 4-aminobenzoic acid ethyl ester (ABEE) degradation toward peroxymonosulfate activation, Quality Control of 826-36-8, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2020), 124936, database is CAplus.

meeting severe environmental problems, highly efficient, environment-friendly, multiple reusable catalysts are demanding to develop. this work prepared C-based bimetallic oxides with O vacancies for peroxymonosulfate activation to degrade 4-aminobenzoic acid Et ester (ABEE). among different molar ratios of Fe₂⁺ and Mn ions, Fe₁Mn₁-Fe NC had the optimum catalytic performance. ABEE degradation should have free radical and non-free radical pathways. all sulfate, hydroxyl, and superoxide radicals and singlet oxygen were responsible for efficient ABEE degradation and mineralization. lattice O was the main reactive site for ABEE degradation electron transport provided a good synergistic redox reaction between Fe and Mn and promoted lattice O release. a proposed pathway for ABEE degradation included electrophilic and radical addition, H-abstraction reaction, and diazotization. this work was expected to provide rational design of bimetallic materials with oxygen vacancies for in-situ environmental remediation.

Chemical Engineering Journal (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, Quality Control of 826-36-8.

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

Zhang, Xiao-Cong published the artcileTurning thiophene contaminant into polymers from wastewater by persulfate and CuO, Synthetic Route of 826-36-8, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2020), 125351, database is CAplus.

turning heterocyclic pollutants into polymers from industrial wastewater is a promising method which opens a new door for feasible, cost effective aromatic wastewater treatment. CuO displayed high reactivity for the catalytic oxidation of thiophene by persulfate (PS) in pH-neutral conditions; the observed rate constant (k_obs) for the PS-CuO system was âˆ?0 times that of the PS-alone system at pH 7.0. the linear relationship between consumed PS and removed thiophene showed a complete removal of 1.0 mM thiophene from solution required 1.11 mM PS in the PS-CuO system, indicating thiophene has not been completely mineralized to CO₂ and water. quenching experiments and EPR anal. ruled out contributions of O₂â€?sup>- and ¹O₂ to thiophene oxidation, suggesting that although SO₄â€?sup>- and OH^– contribute to thiophene oxidation to some extent, they are not the primary oxidants in the PS-CuO system at pH 7.0. the presence of thiophene radical cation indicated electron abstraction from thiophene is an important oxidation pathway. produced thiophene radical cations are polymerized into polymers. solid characterizations further confirmed polythiophene-S,S-dioxide is the primary oxidation product. an electrochem. anal. indicated produced polythiophene-S,S-dioxide polymers showed pseudo-capacitive characteristics and can be used for capacitors.

Chemical Engineering Journal (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 C17H37NO3, Synthetic Route of 826-36-8.

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

Sun, Wenhao published the artcileDesigned polymeric conjugation motivates tunable activation of molecular oxygen in heterogeneous organic photosynthesis, Name: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Science Bulletin (2022), 67(1), 61-70, database is CAplus.

Herein, the first identification of tunable mol. oxygen activation induced by polymeric conjugation in nonmetallic conjugated microporous polymers (CMP) was reported. The conjugation between these can be achieved by the introduction of alkynyl groups. CMP-A with an alkynyl bridge facilitates the intramol. charge mobility while CMP-D, lacking an alkynyl group enhances the photoexcited carrier build-up on the surface from diffusion. These different processes dominate the directed ROS generation of the superoxide radical (·O^–₂) and singlet oxygen (¹O₂), resp. This theory is substantiated by the different performances of these CMPs in the aerobic oxidation of sulfides and the dehydrogenative coupling of amines, and could provide insight into the rational design of CMPs for various heterogeneous organic photosynthesis.

Science Bulletin 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 C15H16O3, Name: 2,2,6,6-Tetramethylpiperidin-4-one.

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

Bai, Rui published the artcileRapid and efficient removal of naproxen from water by CuFe₂O₄ with peroxymonosulfate, Safety of 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Environmental Science and Pollution Research (2020), 27(17), 21542-21551, database is CAplus and MEDLINE.

Abstract: Naproxen, a widely used nonsteroidal anti-inflammatory drug, has been detected in many environmental matrixes and is regarded as an emerging pollutant. Sulfate radical (SO₄·^–) -based advanced oxidation processes have attracted wide attention due to their high efficiency and applicability in the removal of emerging contaminants. In this study, CuFe₂O₄ was used as an efficient catalyst to activate peroxymonosulfate to oxidize naproxen. The results suggested that 92.3% of naproxen was degraded and 50.3% total organic carbon was removed in 60 min in the presence of 0.3 g·L^-1 CuFe₂O₄ and 2 mM peroxymonosulfate. This degradation system showed strong adaptability in a wide pH range from 4.0 to 10.0. Free radical scavenger experiments and ESR anal. indicated that ¹O₂, ·OH, and SO₄·^– are the main active species. Finally, the potential degradation pathways of naproxen were proposed by detecting and analyzing the degradation products with ultra-high-performance liquid chromatog. combined with mass spectrometry. The results of this study suggest that the CuFe₂O₄-activated peroxymonosulfate system is a promising technol. for the removal of naproxen from natural water.

Environmental Science and Pollution Research 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, Safety of 2,2,6,6-Tetramethylpiperidin-4-one.

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

Peng, Yanhua published the artcileA comparison of SMX degradation by persulfate activated with different nanocarbons: Kinetics, transformation pathways, and toxicity, Recommanded Product: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Applied Catalysis, B: Environmental (2022), 121345, database is CAplus.

Nanocarbon-based advanced oxidation processes (AOPs) are widely used in wastewater purification However, the properties of different carbon catalysts lead to differences in the organic degradation mechanism and toxicity of wastewater treatment. Herein, this study provides insight into the differences between the oxidation of sulfamethoxazole (SMX) by carbon nanotube (CNT)/peroxymonosulfate (PMS), nanodiamond (ND)/PMS and PMS-alone systems. The pseudo-first-order reaction constant of the reaction of the SO₄^·--dominated CNT/PMS system with SMX is 19-fold and 30-fold higher than those of the ¹O₂-dominated ND/PMS system and PMS direct oxidation system at pH= 7, resp. In addition, d. functional theory (DFT) calculations and product anal. show that SO₄^·- mainly attacks the aniline and sulfonyl groups, while oxidation of the aniline group is the dominant mode of PMS direct oxidation and ¹O₂ reactivity. The formation of nitro and nitroso byproducts after SMX degradation determines the toxicity difference, and the CNT/PMS system is even more advantageous.

Applied Catalysis, B: Environmental 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, Recommanded Product: 2,2,6,6-Tetramethylpiperidin-4-one.

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

Yao, Yujie published the artcileN-dependent ozonation efficiency over nitrogen-containing heterocyclic contaminants: A combined density functional theory study on reaction kinetics and degradation pathways, Name: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2020), 122708, database is CAplus.

Nitrogen-containing heterocyclic contaminants (NHCs) have aroused intense environmental issues in waterbody because of their high toxicity and strong recalcitrance against natural degradation In this study, ozonation degradation on four typical NHCs – benzotriazole (BTA), benzimidazole (BMZ), indazole (IDZ), and indole (IDO) was carried out to investigate the effects of N atoms on degradation efficiency. Global softness of the NHCs was calculated by d. functional theory (DFT) and correlated with ozonation efficiency. It was discovered that higher global softness of the NHCs resulted in the greater degradation efficiency. Mineralization results together with the quenching tests results suggested that NHCs with ortho-positioned N atoms in heterocyclic ring are easier to be mineralized, while the presence of para-positioned N atoms increased the recalcitrance for destruction. Apart from hydroxyl radicals, superoxide radicals and singlet oxygens were also identified by ESR (EPR) spectra. Condensed Fukui index was employed to probe the potential active sites for both direct ozone oxidation and radical-based attack. Single point energies were further calculated among these active sites to seek the initial-stage hydroxylation intermediates. Combined the calculation results with the identified intermediates from time-of-flight mass spectroscopy (TOF-MS), degradation routes of the NHCs were proposed. This study discovered structure-dependent behavior of NHCs on ozonation efficiency and envisaged a more accurate strategy for establishing the degradation pathway.

Chemical Engineering Journal (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 C6H17NO3Si, Name: 2,2,6,6-Tetramethylpiperidin-4-one.

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

Xi, Xiaomin published the artcileIncreased Varietal Aroma Diversity of Marselan Wine by Mixed Fermentation with Indigenous Non-Saccharomyces Yeasts, SDS of cas: 826-36-8, the publication is Fermentation (2021), 7(3), 133, database is CAplus.

The common use of com. yeasts usually leads to dull wine with similar aromas and tastes. Therefore, screening for novel indigenous yeasts to practice is a promising method. In this research, aroma discrepancies among six wine groups fermentated with indigenous yeasts were analyzed. Three Saccharomyces yeasts (FS36, HL12, YT28) and three matched non-Saccharomyces yeasts (FS31, HL9, YT2) were selected from typical Chinese vineyards. The basic oenol. parameters, aroma compounds, and sensory evaluation were analyzed. The results showed that each indigenous Saccharomyces yeast had excellent fermentation capacity, and mixed-strain fermentation groups produced more glycerol, contributing to sweeter and rounder taste. The results from GC-MS, principal components anal. (PCA), and sensory evaluation highlighted that the HL mixed group kept the most content of Marselan varietal flavors such as calamenene and β-damascone hereby ameliorated the whole aroma quality. Our study also implied that the indigenous yeast from the same region as the grape variety seems more conducive to preserve the natural variety characteristics of grapes.

Fermentation 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 C7H13NO2, SDS of cas: 826-36-8.

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

Sun, Jian published the artcileModulated construction of Fe-based MOF via formic acid modulator for enhanced degradation of sulfamethoxazole:Design, degradation pathways, and mechanism, Safety of 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Journal of Hazardous Materials (2022), 128299, database is CAplus and MEDLINE.

Metal-organic frameworks (MOFs) have attracted more attention because of their excellent environmental catalytic capabilities. Modulation approach as an advanced assistant strategy is vital essential to enhancing the performance of MOFs. In this study, the modulated method was used to successfully synthesize a group of Fe-based MOFs, with formic acid as the modulator on the synthesis mixture The most modulated sample Fe-MOFs-2 exhibit high sp. surface areas and higher catalytic activity, which could effectively degrade SMX via PS activation, with almost 95% removal efficiency within 120 min. The results revealed that the % RSE of modulated Fe-MOFs-2 increased from 2.31 to 3.27 when compared with the origin Fe-MOFs. This may be due to the addition of formic acid induces the formation of more coordinatively unsaturated metal sites in the catalyst, resulting in structural defects. In addition, the quenching experiment and EPR anal. verified SO^–₄·and·OH as the major active free radicals in the degradation process. Modulated Fe-MOFs-2 demonstrated good reusability and stability under fifth cycles. Finally, four possible degradation pathways and catalytic mechanism of Fe-MOFs-2 was tentatively proposed. Our work provides insights into the rational design of modulated Fe-MOFs as promising heterogeneous catalysts for advanced wastewater treatment.

Journal of Hazardous Materials 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 C15H23BO2, Safety of 2,2,6,6-Tetramethylpiperidin-4-one.

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

Zhou, Mingsong published the artcileSynthesis of a Hindered Amine-Grafted Lignin-Based Emulsifier and Its Application in a Green Emulsifiable Concentrate, Application of 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Journal of Agricultural and Food Chemistry (2019), 67(40), 11129-11136, database is CAplus and MEDLINE.

The 4-amion-2,2,6,6-tetramethylpiperidine (Temp) was grafted into the Sodium Lignosulfonate (SL) to obtain the hindered amine modified lignosulfonate (SL-Temp). Then the polymer surfactant (SL-Temp-CTAB) was prepared by using cetyltrimethylammonium bromide (CTAB) and SL-Temperature The obtained SL-Temp-CTAB was used as emulsifier to prepare green Emulsifiable Concentrate (EC) of avermectin (AVM), which shows good emulsifying property and storage stability. The prepared AVM green EC can form AVM-loaded microspheres with nanometer particle size distribution after emulsification in water. After UV irradiation for 70 h, the AVM retention rate of the green EC prepared using SL-Temp-CTAB was 75.8%, which is much higher than that of com. EC (0.4%) and the green EC prepared using unmodified SL (31.4%). Moreover, the AVM green EC prepared using SL-Temp-CTAB has slow-release performance, and the release equilibrium time is 5.3 times of the com. EC. Therefore, the newly prepared AVM green EC using lignin-based functional emulsifier shows good anti-photolysis and slow-release performance compared with the traditional EC.

Journal of Agricultural and Food 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 C4H6N2, Application of 2,2,6,6-Tetramethylpiperidin-4-one.

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