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Discovery, Characterization, and Anti-XOD Activity of Calcium Metallophore from .
Org Lett
January 2025
School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.
In this work, coixalkyne A (), a natural polynuclear calcium complex with a novel cross-shaped molecular architecture, was isolated from L. along with the undescribed analogue coixalkyne B (). Their structures were identified by means of NMR spectroscopy, ECD calculations, and single-crystal X-ray diffraction.
View Article and Find Full Text PDFPhotocatalytic Hydroxylation and Oxidative Coupling Reactions Mediated by Multinuclear Au(I) Supramolecular Clusters.
Angew Chem Int Ed Engl
December 2024
Key Laboratory of Green Preparation and Application for Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Science, School of Materials Science and Engineering, Hubei University, Wuhan, Hubei, 430062, P. R. China.
Polynuclear Au(I) cluster photocatalysts, known for their high activity and stability, hold substantial potential in organic synthetic chemistry. This study synthesized two Au(I) supramolecular cluster catalysts with different nuclearities: a tetranuclear cluster, C1 ([(dppmAu)L] • PF ), and a hexadecanuclear cluster, C2 [(dppmAu)(Au)(L)] • 4PF , through a multicomponent stepwise self-assembly approach. Both cluster structures feature aurophilicity interaction motifs that endow them with exceptional photocatalytic performance, exhibiting optical band gaps of 2.
View Article and Find Full Text PDFAssembling Di- and Polynuclear Cu(I) Complexes with Rigid Thioxanthone-Based Ligands: Structures, Reactivity, and Photoluminescence.
Inorg Chem
December 2024
Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
Thioxanthone (TX) molecules and their derivatives are well-known photoactive compounds. Yet, there exist only a handful of luminescent systems combining TX with transition metals. Recently, we reported a TX-based PSP pincer ligand () that appears as a promising platform for filling this niche.
View Article and Find Full Text PDFHeterochiral Self-Discrimination Driven Dimerization of Polynuclear Gold(I)-Sulfido Complexes with Enhanced Phosphorescence.
Angew Chem Int Ed Engl
December 2024
Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry, and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, 999077, P. R. China.
Article Synopsis
- Researchers have created decanuclear chiral gold(I) sulfido clusters (S-Au and R-Au) using specialized SDP ligands.
- Mixing these chiral clusters in a 1:1 ratio yields an achiral heterodimer icosanuclear meso-cluster (meso-Au), which exhibits intense near-infrared luminescence with a peak at around 750 nm.
- The study highlights the significant increase in photoluminescence quantum yield for meso-Au (25%) compared to the chiral clusters (8%), and shows that the clustering process is influenced by solvent polarity and diphosphine ligand configuration, aiding the understanding of self-sorting in chiral assemblies.
Polymerization potential of a bacterial CotA-laccase for β-naphthol: enzyme structure and comprehensive polymer characterization.
Front Microbiol
November 2024
Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
Introduction: Laccases are blue-multicopper containing enzymes that are known to play a role in the bioconversion of recalcitrant compounds. Their role in free radical polymerization of aromatic compounds for their valorization remains underexplored. In this study, we used a pBAD plasmid containing a previously characterized CotA laccase gene (abbreviated as -Lacc) from strain ATCC 9945a to express this enzyme and explore its biotransformation/polymerization potential on β-naphthol.
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