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Magnetization and Anisotropy of Magnetic Susceptibility of a Liquid Crystal Doped with Chlorophylls a, b and Carotenoids.
ACS Omega
January 2025
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50/38 Akademgorodok, Krasnoyarsk 330036, Russia.
The magnetization and anisotropy of magnetic susceptibility of a 5CB nematic liquid crystal doped three extracts containing chlorophylls a and b and carotenoids in different weight percentage has been studied. The extracts have been dissolved in the liquid crystal matrix at a concentration of 2%. The magnetic susceptibility of the substances has been measured by the Faraday-Curie balance method.
View Article and Find Full Text PDFDiverse Behaviors of N on Mo Centers Bearing POCOP-Pincer Ligands and the Role of π-Electron Configuration in Regulating the Pathway of N Activation.
J Am Chem Soc
January 2025
School of Chemistry, Dalian University of Technology, No. 2 Linggong Rd., 116024 Dalian, Liaoning, China.
Activation of N through transition-metal complexes has emerged as a powerful strategy for N fixation under mild conditions. Dissociative route and associative route are considered as two major routes for N transformation on transition-metal complexes. Homolysis of N between two metal fragments is the crucial step of the dissociative route and has been proven to be an efficient approach to the terminal metal nitride, which is the key intermediate for both routes.
View Article and Find Full Text PDFAnalogy of C-Pt and C-O Chemical Bonding in the Diatomic CPt and CO.
J Phys Chem A
December 2024
School of Geographical Sciences, Shanxi Normal University, No. 339, Taiyu Road, Taiyuan, Shanxi 030031, People's Republic of China.
The conjugate-pair molecules of CO and CPt provide a prototype of the autogenic isolobal relationship between the O and Pt atoms that can rationalize the structure and reactivity trends of platinum carbides. Herein, the photoelectron detachment at 532 nm has been recorded for the gas-phase CPt by using the photoelectron velocity-map imaging spectroscopy. The vibrationally resolved ground-state transition reveals a wealth of information concerning the electronic ground states of CPt.
View Article and Find Full Text PDFReversible Electrocatalytic NAD/NADH Interconversion Mediated by a Pyrazine-Amidate Iridium Complex.
J Am Chem Soc
December 2024
Department of Chemistry, Biology, and Biotechnology, Università degli Studi di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy.
Herein, we report reversible electrocatalytic NAD/NADH interconversion mediated by [Cp*Ir(pyza)Cl] (, pyza = pyrazine amidate). was designed through a rational approach aimed at lowering the overpotential of NAD to NADH reduction with respect to that observed for electrocatalyst [Cp*Ir(pica)Cl] (, pica = picolinamidate). The peculiar properties of pyza, which is substantially less σ electron-donator and more π electron-acceptor than pica, resulted in an easier bielectronic reduction process occurring at -0.
View Article and Find Full Text PDFOrigin of Regioselectivity Inversion Tuned by Substrate Electronic Properties in Co(III)-Catalyzed Annulation of N-Chlorobenzamide with Alkenes.
Chempluschem
November 2024
Department of Interventional Medicine and Minimally Invasive Oncology, The Second Hospital of Shandong University, The Institute of Interventional Oncology Shandong University, Jinan, Shandong, 250033, P. R. China.
Article Synopsis
- - The study focuses on how Co(III) acts as a catalyst in reactions between N-chlorobenzamide and various olefins, analyzing how different electron properties of these olefins affect the reaction outcomes.
- - A key finding is that the step where the alkene inserts into the reaction dictates the overall regioselectivity, meaning it influences which products are formed.
- - The energy decomposition analysis (EDA) reveals that when using styrene, a specific insertion is favored due to less repulsion between the particles involved, while a different insertion pathway is preferred with vinyltrimethylsilane because of its higher electron density enhancing stabilizing interactions.
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