Tag: M.W=150-200

Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH2–) and one amine bridge (–NH–). 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. It is a colorless liquid with an odor described as objectionable, and typical of amines. Quality Control of 2403-88-5.

Asif, Muhammad Bilal;Ji, Bingxuan;Maqbool, Tahir;Zhang, Zhenghua research published 《 Algogenic organic matter fouling alleviation in membrane distillation by peroxymonosulfate (PMS): Role of PMS concentration and activation temperature》, the research content is summarized as follows. Membrane distillation (MD) has attracted significant attention in recent years; however, MD membrane fouling is still a big issue. For the first time, this study explored the performance of a standalone direct contact membrane distillation (DCMD) and an integrated peroxymonosulfate (PMS)/DCMD for the treatment of surface water mainly containing algogenic organic matter (AOM) to elucidate pollutant removal as well as fouling propensity and mitigation. The results indicated that the overall conductivity and dissolved organic carbon (DOC) removals by the standalone DCMD and PMS/DCMD were comparable (98-99.8%). However, permeate flux of the standalone DCMD reduced by 62% due to severe membrane fouling. After pre-treatment at 60°C, flux reduction of 27-40% and no flux decline were observed at PMS concentrations of 1-5 mM and 10-15 mM, resp. The optimum PMS concentration of 10 mM was also demonstrated to be effective for membrane fouling mitigation at 40 and 50°C. Characterization of AOM indicated the presence of protein-like and high MW (≥10 kDa) compounds, which were readily degraded by the reactive species (OH. and ¹O₂) generated by heat-activated PMS. Characterization of fouled MD membrane confirmed that fouling was mainly caused by protein-like compounds, consequently affecting permeate flux and membrane properties.

Quality Control of 2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., 2403-88-5.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Piperidine the name comes from the genus name Piper, which is the Latin word for pepper. 2403-88-5, formula is C9H19NO, Name is 2,2,6,6-Tetramethyl-4-piperidinol. Although piperidine is a common organic compound, it is best known as a representative structure element within many pharmaceuticals and alkaloids, such as natural-occurring solenopsins. Formula: C9H19NO.

Barrios, Benjamin;Mohrhardt, Benjamin;Doskey, Paul V.;Minakata, Daisuke research published 《 Mechanistic Insight into the Reactivities of Aqueous-Phase Singlet Oxygen with Organic Compounds》, the research content is summarized as follows. Singlet oxygen (¹O₂) is a selective reactive oxygen species that plays a key role for the fate of various organic compounds in the aquatic environment under sunlight irradiation, engineered water oxidation systems, atm. water droplets, and biomedical systems. While the initial rate-determining charge-transfer reaction mechanisms and kinetics of ¹O₂ have been studied extensively, no comprehensive studies have been performed to elucidate the reaction mechanisms with organic compounds that have various functional groups. In this study, we use d. functional theory calculations to determine elementary reaction mechanisms with a wide variety of organic compounds The theor. calculated aqueous-phase free energies of activation of single electron transfer and ¹O₂ addition reactions are compared to the exptl. determined rate constants in the literature to determine linear free-energy relationships. The theor. calculated free energies of activation for the groups of phenolates and phenols show excellent correlations with the Hammett constants that accept electron densities by through-resonance. The dominant elementary reaction mechanism is discussed for each group of compounds As a practical implication, we demonstrate the fate of environmentally relevant organic compounds induced by photochem. produced intermediate species at different pH and evaluate the impact of predicting rate constants to the half-life.

2403-88-5, 2,2,6,6-Tetramethyl-4-piperidinol(TEMPO) is a useful research compound. Its molecular formula is C9H19NO and its molecular weight is 157.25 g/mol. The purity is usually 95%.
TEMPO is an intermediate used in the preparation of Piperidinyloxy free radical derivatives.
TEMPO is an organic compound that acts as a radical scavenger. It is stable in the presence of water and air and can be used for the inhibition of bacterial growth. TEMPO reacts with reactive intermediates to form non-reactive substances and terminate chain reactions. This process is optimal at temperatures between 0°C and 40°C and pH values between 3.5 and 7.5. TEMPO has been shown to inhibit the growth of bacteria by reacting with reactive molecules such as amines, chlorides, or low energy radicals in aqueous solution. TEMPO also has genotoxic activity that inhibits DNA synthesis in bacterial cells through oxidation of guanine residues on DNA molecules., Formula: C9H19NO

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem