Article
Energy & Fuels
Ewelina Kruszczak, Hanna Kierzkowska-Pawlak
Summary: The study investigated the rates of CO2 absorption in aqueous solutions of N-methyl-1,3-propanediamine (MAPA) and its mixture with N,N-diethylethanolamine (DEEA). The results showed that low concentrations of MAPA in DEEA solutions significantly accelerated the rate of CO2 absorption, indicating its potential as an efficient CO2 absorbent.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Inorganic & Nuclear
Dohyun Moon, Jong-Ha Choi
Summary: The crystal structure of cis-[Cr(NCS)(cyclam)(mu-NCS)ZnCl3] was determined, showing a distorted octahedral geometry for the chromium(III) ion coordinated by cyclam and NCS groups, and a slightly distorted tetrahedral environment for the zinc(II) ion coordinated by Cl ions and a bridged thiocyanate group. The crystal packing is stabilized by intermolecular hydrogen bonds, with H···Cl/Cl···H, H···H, H···S/S···H, and H···C/C···H interactions playing important roles.
JOURNAL OF COORDINATION CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Andriani G. G. Chaidali, Ioannis N. N. Lykakis
Summary: A facile green synthetic protocol for the synthesis of several substituted N-(pyridin-2-yl)imidates was reported. The method involved the in situ formation of alpha-iminonitriles under the Lewis acid catalysis and subsequent conversion into the desired imidates using Cs2CO3 in alcoholic media. The synthetic protocol was also scalable and successfully applied for the synthesis of N-heterocycles.
Article
Crystallography
Lesetja V. Ramoba, Orbett T. Alexander, Frederick P. Malan, Amanda-Lee E. Manicum
Summary: The crystal structure of the compound is triclinic, with lattice parameters a = 7.4939(2) Å, b = 10.1316(2) Å, c = 13.8351(3) Å, α = 103.453(2)°, β = 101.992(2)°, γ = 107.880(2)°. The volume of the unit cell is 926.98(4) Å^3, and it contains 2 molecules. The final R-factor for the refined structure is 0.0341.
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
(2023)
Article
Chemistry, Inorganic & Nuclear
Xiong Wang, Rui Li, Mingming Wei, Jingming Li, Zhenhua Li, Honghao Wang, Xia Li
Summary: A new metal-organic coordination polymer, [Co(2,3'-oba)(dpp)](n), was synthesized by hydrothermal method, showing single-molecule magnet behavior and excellent catalytic properties in dye degradation.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Medicinal
Chengbin Yang, Yi Chen, Tianze Wu, Yunjian Gao, Xiaofeng Liu, Yongtai Yang, Yun Ling, Yu Jia, Mingli Deng, Jianxin Wang, Yaming Zhou
Summary: The PI3K-Akt-mTOR pathway is highly activated in human hematological malignancies and has shown promise as a potential target for acute myeloid leukemia (AML) therapy. In this study, we synthesized a series of 7-azaindazole derivatives as potent dual inhibitors of PI3K/mTOR, with compound FD274 showing excellent inhibitory activity. In vitro and in vivo studies demonstrated the potential of FD274 as a targeted anti-AML drug candidate.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Florian Ritter, Karl N. McCabe, Laurent Maron, Thomas P. Spaniol, Jun Okuda
Summary: Selective protonolysis of polymeric zinc dihydride using the conjugate acid of TMPDA yielded stable molecular zinc hydride cations, with further reactions forming dimeric zinc hydride or dizinc trihydride cations.
Article
Crystallography
Alassane Saidou Diallo, Ibrahima Elhadji Thiam, Mbosse Gueye-Ndiaye, Moussa Dieng, James Orton, Coles Simon, Mohamed Gaye
Summary: This article presents the molecular structure of a non-symmetric tetranuclear copper complex, which contains two ligand molecules connecting copper ions in different modes. A chair-like Cu3O3 structure is formed in the crystal, and multiple hydrogen bonds are observed.
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS
(2022)
Article
Thermodynamics
Pan Zhang, Yanxi Ji, Wenya Li, Lihua Xu, Lemeng Wang, Dong Fu
Summary: This study measured and analyzed the viscosities, activation energies, and CO2 diffusion coefficients of different amine compounds in DEAE solutions. The results showed that the DEAE-BDA absorbent has lower viscosity, higher CO2 diffusion coefficient, and lower activation energy, indicating better application potential.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2022)
Article
Chemistry, Physical
Thomas H. Speak, Diogo J. Medeiros, Mark A. Blitz, Paul W. Seakins
Summary: Emissions of amines and amides have significant impact on the atmosphere, and OH reaction rate coefficients with these compounds can be estimated using structure-activity relationships. This study measured the reaction rate coefficients of three compounds using various experimental methods, revealing temperature and structural dependencies in the reactions with OH. Supporting ab initio calculations were also conducted to provide additional insight into the reaction mechanisms.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Luis M. S. Garcia, Priscilla J. Zambiazi, Khaoula Chair, Tuan Duy Doan, Andrezza S. Ramos, Julio Nandenha, Rodrigo F. B. De Souza, Larissa Otubo, Adam Duong, Almir O. Neto
Summary: This study investigates the ideal relationship between the nanostructure of a palladium complex and carbon to obtain a stable, conductive, and functional reagent diffusion electrode for the partial oxidation of methane to methanol. The results suggest that a 20% mass concentration of the palladium complex supported on carbon is the most active, exhibiting lower open-circuit and power density but higher efficiency in methanol production.
Article
Chemistry, Physical
Khaoula Chair, Cesar Augusto Luna Caceres, Sanil Rajak, Olivier Schott, Gustavo E. Ramirez-Caballero, Thierry Maris, Garry S. Hanan, Adam Duong
Summary: Carbon dioxide is an important trace gas in the atmosphere and its high concentration leads to serious issues. The use of solar energy for the photochemical reduction of CO2 is a promising strategy, but it faces challenges that need to be addressed for it to become a sustainable alternative for fuel and chemical generation. In this study, molecular photocatalysts were designed and demonstrated remarkable photocatalytic properties for CO2 reduction to CO. The mechanistic pathways of the reaction were investigated using a combination of structural characterization, experimental data, and density functional theory calculations.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Roman Rusnac, Olga Garbuz, Yurii Chumakov, Victor Tsapkov, Christelle Hureau, Dorin Istrati, Aurelian Gulea
Summary: A thiosemicarbazone-type ligand containing a paracetamol structural unit was synthesized for the first time. Five new coordination compounds based on copper(II) salts were obtained and characterized. The synthesized compounds demonstrated promising antibacterial, antifungal, and antioxidant activities.
Article
Chemistry, Organic
Hong-Yan Bi, Qing-Yan Wu, Xiao-Mei Zhou, Hui-Juan Xu, Cui Liang, Dong-Liang Mo, Xiao-Pan Ma
Summary: By employing N-hydroxypyridin-2-ones as the oxygen and nitrogen sources, arylboronic acids were difunctionalized successfully to prepare various N-(2-hydroxyaryl)pyridin-2-ones in good yields through a copper(II)-catalyzed Chan-Lam reaction and subsequent BF3 promoted selective 1,3-rearrangement. Mechanistic studies revealed that the selectivity of the 1,3-rearrangement is controlled by the formation of the key aryloxypyridinium salt. The obtained products can be easily converted to various useful pyridin-2-one scaffolds.
Article
Chemistry, Organic
Shih-Yun Chen, Rong Chang, Zhong-Xin Lin, Chien-Wen Lin, Li-Ching Shen, Andrew C. -H. Sue, Mei-Chun Tseng, Jean-Ho Chu
Summary: In this study, a facile synthetic method to produce N-(CH2-aryl/alkyl)-substituted N-(pyridin-2-yl)benzamides via palladium-mediated C(sp(3))-H bond activation was presented. The structures of the dinuclear palladacycle intermediates, which were formed by reacting the N-methyl-N-(pyridin-2-yl)benzamide precursor with palladium(II) acetate, were elucidated by various analyses. The subsequent C(sp(3))-H bond functionalizations on the N-methyl group of the starting substrate showed easy productions of the desired N-(CH2-aryl/alkyl)-substituted N-(pyridin-2-yl)benzamides with good functional group tolerance. A plausible mechanism was proposed based on computational calculations and kinetic isotope effect experiments. Furthermore, the successful transformation of the prepared N-(CH2-aryl)-N-(pyridin-2-yl)benzamides to N-(CH2-aryl)-2-aminopyridine was demonstrated.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
