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Mercury(II) halide complex of -[( BuNH)(Se)P(μ-N Bu)P(Se)(NH Bu)].
Acta Crystallogr E Crystallogr Commun
October 2024
Department of Chemistry and Biochemistry Lamar University, 4400 MLK Blvd Beaumont Texas 77710 USA.
The mercury(II) halide complex [1,3-di--butyl-2,4-bis-(-butyl-amino)-1,3,2λ,4λ-di-aza-diphosphetidine-2,4-diselone-κ ,']di-iodido-mercury(II),-di-methyl-formamide monosolvate, [HgI(CHNPSe)]·CHNO or ()HgI, , containing -[( BuNH)(Se)P(μ-N Bu)P(Se)(NH Bu)] () was synthesized and structurally characterized. The crystal structure of confirms the chelation of chalcogen donors to HgI with a natural bite angle of 112.95 (2)°.
View Article and Find Full Text PDFChelating Properties of NO-Donors Toward Cu(II) Ions: Speciation in Aqueous Environments and Catalytic Activity of the Dinuclear Complexes.
Molecules
December 2024
Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy.
This study focuses on the use of three isostructural NO donor ligands, specifically known to form complexes with copper ions, to chelate Cu(II) from aqueous solutions. The corresponding Cu(II) complexes feature a dinuclear copper core mimicking the active site of natural superoxide dismutase (SOD) enzymes while also creating a coordination environment favorable for catalase (CAT) activity, being thus appealing as catalytic antioxidant systems. Given the critical role of copper dysregulation in the pathophysiology of Alzheimer's disease (AD), these complexes may help mitigate the harmful effects of free Cu(II) ions: the goal is to transform copper's reactive oxygen species (ROS)-generating properties into beneficial ROS-scavenging action.
View Article and Find Full Text PDFSynthesis, Structure, and Properties of 2D Lanthanide(III) Coordination Polymers Constructed from Cyclotriphosphazene-Functionlized Hexacarboxylate Ligand.
Molecules
November 2024
Hubei Key Laboratory of Radiation Chemistry and Functional Materials, School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning 437100, China.
The design and synthesis of novel lanthanide-based coordination polymers (Ln-CPs) from flexible organic ligands is still attractive and challenging. In this work, two isostructural Ln-CPs with a unique 2D network, namely, [Ln(HL)(DMF)]] (Ln = Dy for , Tb for ) based on a flexible polycarboxylic acid ligand hexakis(4-carboxylato-phenoxy)cyclotriphosphazene (HL), have been solvothermally synthesized and structurally characterized. Significantly, it is the first observation of polycarboxylic acid ligands participating in coordination in the construction of coordination polymers in the form of semi-deprotonation.
View Article and Find Full Text PDFInsights into Structural Diversity and Morphotropic Evolution in ATh(WO) (A=Li, Na, K, Rb and Cs) Family.
Chemistry
December 2024
Institute of Energy Technologies (IET-1), Forschungszentrum Jülich GmbH, Jülich, Germany.
A series of four new thorium tungstates, ATh(WO) (A=Li, K, Rb, Cs), were synthesized using high-temperature solid-state method. Structural studies of the materials reveal distinct structural changes with underlying similarities influenced by the nature of A-site cations. LiTh(WO) exhibits a two-dimensional corrugated sheet structure stabilized by Li cations, crystallizing in P space group.
View Article and Find Full Text PDFBridge editing of spin-flip emitters gives insight into excited state energies and dynamics.
Chem Sci
December 2024
Department of Chemistry, Johannes Gutenberg University Mainz Duesbergweg 10-14 55128 Mainz Germany
Six-coordinate chromium(iii) complexes with high spin-flip (SF) photoluminescence quantum yields and lifetimes (molecular rubies) have attracted huge interest in the past years due to their applicability in sensing, photocatalysis or circularly polarised emission. However, clearcut design rules for high quantum yields and lifetimes are still lacking due to the multidimensional problem of the non-radiative decay of the SF states. Based on an isostructural series of complexes differing in the ligand backbone, we disentangle decisive structural and electronic features for SF excited state energies and non-radiative decays promoted by spin-orbit coupling, Jahn-Teller distortions and (thermally activated) multiphonon relaxation.
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