In the title compound, [PdCl(2)(C(6)H(6)N(2)O(2))(2)], the Pd(II) atom is coordinated in a distorted square-planar geometry by two N atoms from two 4-nitro-aniline ligands and two Cl atoms in a trans arrangement. Inter-molecular N-H⋯Cl hydrogen bonds involving the amino groups and chloride anions lead to a chain along [100]. These chains are further self-assembled into a three-dimensional network through N-H⋯O and N-H⋯Cl hydrogen bonds.
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http://dx.doi.org/10.1107/S1600536812042134 | DOI Listing |
J Nat Prod
January 2025
Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States.
(-)-Cryptanoside A () was identified previously as a major cytotoxic component of the stems of collected in Laos, which mediates its activity by targeting Na/K-ATPase (NKA), with hydrogen bonds formed between its 11- and 4'-hydroxy groups and NKA being observed in its docking profile. In a continuing investigation, and its 17-epimer, (-)-17--cryptanoside A (), and the new (+)-2-hydroxyandrosta-4,6-diene-3-one-17-carboxylic acid () and the known (+)-2,21-dihydroxypregna-4,6-diene-3,20-dione or 2-hydroxy-6,7-didehydrocortexone () pregnane-type steroids were isolated from . In addition, (-)-11,4'-di--acetylcryptanoside A () has been synthesized from the acetylation of .
View Article and Find Full Text PDFPLoS One
January 2025
Chemistry and Biochemistry, University of St. Thomas, Houston, TX, United States of America.
Cardiovascular disease (CVD) remains the leading cause of morbidity and mortality globally, with oxidative stress playing a pivotal role in its progression. Free radicals produced via oxidative stress contribute to lipid peroxidation, leading to subsequent inflammatory responses, which then result in atherosclerosis. Antioxidants inhibit these harmful effects through their reducing ability, thereby preventing oxidative damage.
View Article and Find Full Text PDFJ Phys Chem A
January 2025
Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay UMR 8214, 91405 Orsay, France.
This study deals with the understanding of hydrogen atom scattering from graphene, a process critical for exploring C-H bond formation and energy transfer during atom surface collision. In our previous work [Shi, L.; 2023, 159, 194102], starting from a cell with 24 carbon atoms treated periodically, we have achieved quantum dynamics (QD) simulations with a reduced-dimensional model (15D) and a simulation in full dimensionality (75D).
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
Department of Chemistry, Brandeis University, 415 South St., Waltham, Massachusetts 02454, United States.
Despite their critical role in context-dependent interactions for protein functions, intrinsically disordered regions (IDRs) are often overlooked for designing peptide assemblies. Here, we exploit IDRs to enable context-dependent heterotypic assemblies of intrinsically disordered peptides, where "context-dependent" refers to assembly behavior driven by interactions with other molecules. By attaching an aromatic segment to oppositely charged intrinsically disordered peptides, we achieve a nanofiber formation.
View Article and Find Full Text PDFACS Nano
January 2025
WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6102, Australia.
Quadruple perovskite oxides have received extensive attention in electronics and catalysis, owing to their cation-ordering structure and intriguing physical properties. However, their repertoires still remain limited. In particular, piezoelectricity from quadruple perovskites has been rarely reported due to the frustrated symmetry-breaking transition in A-site-ordered perovskite structures, disabling their piezoelectric applications.
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