Results 31 to 40 of about 45,771 (255)

Evaluating the Ability of Methyldiethanolamine/Piperazine Microemulsion in CO2 Absorption [PDF]

شیمی کاربردی روز, 2023
In this study CO2 absorption into aqueous droplets of N-methyl-diethanolamine (MDEA) in water-in-oil (w/o) and oil-in-water (o/w) emulsions were investigated in batch-stirred reactor at 298 K and different CO2 partial pressure in the range of 0.1-0.5 bar.
Masoud Nasiri, Monireh Zolfaghari, Ali Haghighi Asl   +2 more
doaj   +1 more source

Rearrangement of Imidazolidine to Piperazine Rings in the Presence of Dy^III

Chemistry Proceedings, 2022
The formation of imidazolidines from secondary amines and aldehydes is well known. This small cycle can act as a nitrogen donor, and it is usually stable when it coordinates to metal ions.
Julio Corredoira-Vázquez, Paula Oreiro-Martínez, Ana M. García Deibe, Jesús Sanmartín-Matalobos, Matilde Fondo   +4 more
doaj   +1 more source

Recent advances in photocatalytic hydrogen peroxide production

PhotoMat, EarlyView., 2023
We classify the representative photocatalytic materials for photosynthesis of hydrogen peroxide (H2O2) in recent years and discuss the related modification methods in detail, providing inspiration and insights for the future design of photocatalysts for H2O2 production.
Jinyu Yan, Yuan Li, Yunxiang Li, Shuxin Ouyang, Tierui Zhang   +4 more
wiley   +1 more source

4-(4-Methylphenylsulfonyl)piperazin-1-ium trifluoroacetate

Acta Crystallographica Section E, 2013
In the title salt, C11H17N2O2S+·CF3COO−, the cation is protonated at the secondary piperazine N atom. The dihedral angle between the benzene ring and the piperazine mean plane is 85.54 (10)°.
S. Sreenivasa, N. R. Mohan, T. Madhu Chakrapani Rao, P. A. Suchetan, B. S. Palakshamurthy, Vijithkumar   +5 more
doaj   +1 more source

Recent research progress and outlook on the bioactivities and mechanism of piperazine pesticides

Journal of Integrative Agriculture
Piperazine is a nitrogen-containing heterocyclic compound that is commonly used as an intermediate linking group in the structural derivation of compounds.
Yanju Wang, Baoan Song
doaj   +1 more source

Substanţele psihoactive noi şi riscurile consumului la copii şi adolescenţi [PDF]

Romanian Journal of Pediatrics, 2019
Conform definiției stabilite de Monitorul European pentru Droguri şi Toxicomanie (European Monitoring Centre for Drugs and Drug Addiction – EMCDDA), o „substanță psihoactivă nouă este considerată orice substanță narcotică sau psihotropă în formă pură sau
Viorela Nițescu
doaj   +1 more source

Piperazine-Grafted Magnetic Reduced Graphene Oxide (Fe₃O₄@rGO-NH) as a Reusable Heterogeneous Catalyst for Gewald Three-Component Reaction

, 2020
In recent years, interesting physical and chemical properties of graphene oxide (GO) have led to a great deal of excitement in the chemistry. One of the most promising results is the use of GO and the functionalized GOs as heterogeneous catalysts in ...
Behrooz Maleki (3610853), Morteza Bakhshi-Noroozi (8392329), Esmail Rezaei-Seresht (8392326)   +2 more
core   +1 more source

The crystal structures of two new coumarin derivatives: 2-(4-{2-[(2-oxo-2H-chromen-4-yl)oxy]acetyl}piperazin-1-yl)acetamide and N-(2,4-dimethoxybenzyl)-2-[(2-oxo-2H-chromen-4-yl)oxy]acetamide

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compounds, 2-(4-{2-[(2-oxo-2H-chromen-4-yl)oxy]acetyl}piperazin-1-yl)acetamide, C17H19N3O5, (I), and N-(2,4-dimethoxybenzyl)-2-[(2-oxo-2H-chromen-4-yl)oxy]acetamide, C20H19NO6, (II), are new coumarin derivatives.
S. Syed Abuthahir, M. NizamMohideen, V. Viswanathan, M. Govindhan, K. Subramanian   +4 more
doaj   +1 more source

Synthesis and Antimicrobial Activity of Some New Piperazine Derivaties Containing Aryl Sulfonyloxy Group

E-Journal of Chemistry, 2004
Novel N-substituted piperazine derivatives containing sulfonyloxy aniline moiety have been prepared. The various 4-sulfonyloxy aniline (SA) derivatives (2a-h) have been prepared by the condensation reaction of N-Acetyl Sulfanilyl chloride (ASC) and ...
H. S. Patel, H. D. Desai, H. J. Mistry
doaj   +1 more source

Piperazine-functionalized porous anion exchange membranes for efficient acid recovery by diffusion dialysis

, 2022
Piperazine-functionalized porous anion exchange membranes for efficient acid recovery by diffusion ...
S Pan (13147035), J Chen (80904), X You (11796512), Shuaifei Zhao (13094592), G Lu (7647290), L Teng (13354509), X Lin (7714988), J Lin (6951434)   +7 more
core