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The reaction between dipyriamethyrin and copper(II) acetate [Cu(OAc)] afforded what is, to our knowledge, the first transition metal-dipyriamethyrin complex. Molecular and electronic characterization of this binuclear Cu(II) complex via EPR, UV-vis, and single crystal X-ray diffraction analysis revealed marked differences between the present constructs and previously reported binuclear copper(II) hexaphyrin species. UV-vis titration analyses provided evidence for a homotropic positive allosteric effect, wherein the binuclear species is formed without significant intermediacy of a monomeric complex.
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http://dx.doi.org/10.3390/molecules25061446 | DOI Listing |
Sci Rep
August 2025
Department of Biopharmaceutics and Clinical Pharmacy, School of Pharmacy, The University of Jordan, Amman, 11942, Jordan.
Two new Schiff base ligands (L1 and L2) were synthesized by condensing thiocarbohydrazide (TCH) with o-anisaldehyde or p-anisaldehyde in ethanol. Their mono- and bi-nuclear complexes with Sn(II), Zn(II), and Fe(II) were prepared for potential fluorescence and biological applications. Characterization was performed using FT-IR, NMR, UV-Vis spectroscopy, mass spectrometry, molar conductance, TGA, X-ray diffraction and SEM.
View Article and Find Full Text PDFDalton Trans
August 2025
Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1000-049 Lisboa, Portugal.
In this work, new copper(I) complexes of borane-functionalized bis(3,5-dimethylpyrazolyl)methane ligands were synthesized, characterized and used as catalysts for the cycloaddition of phenylacetylene and azides. Reaction of the allylated bis(3,5-dimethylpyrazolyl)methane proligand (La) with CuCl or [Cu(NCMe)]BF gave rise to the neutral copper chloride complex [(La)CuCl] (1a) or the binuclear cationic copper complex [(La)Cu(NCMe)]2(BF4)2 (2a2), respectively. The same reactions using a borane-functionalized bis(3,5-dimethylpyrazolyl)methane proligand (Lb) led to the isolation of complexes [(Lb)CuCl] (1b) and [(Lb)Cu(NCMe)2]BF4 (2b).
View Article and Find Full Text PDFNat Commun
August 2025
Institute of Frontier Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Qingdao, Shandong, PR China.
Selective hydrogenation of CO into methanol offers an ideal route for the utilization of greenhouse gas, but it remains a great challenge to be carried out under mild conditions due to the intrinsic chemical stability of CO. Here, we report sulfur-bridged cooperative molybdenum binuclear sites anchored on covalent triazine frameworks (denoted as Mo-S-Mo/CTF), as highly efficient active sites for CO hydrogenation to methanol at room temperature. Under near-ambient conditions (30 °C, 0.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
August 2025
Institute for Plant-Human Interface, Northeastern University, Boston, MA, 02115, USA.
DUF3328 is a protein family widely found in fungal natural product biosynthesis pathways. Although DUF3328 proteins have long been implicated in diverse modifications of inert C(sp)─H bonds, including halogenation, hydroxylation, and macrocyclization, the biochemical properties and catalytic mechanisms of DUF3328 proteins remain elusive. Here, we report the characterization of the DUF3328 protein CctR, which catalyzes C(sp)─H hydroxylation of fungal cyclic peptide cyclochlorotine.
View Article and Find Full Text PDFBioorg Chem
August 2025
Department of Biochemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan.
NHC-containing compounds are well known for their diverse and promising bioactivities. Incorporation of a metal center into a heterocyclic framework can significantly enhance the bioactivity, leading to improved efficiency. In this scenario, three new bi-imidazolium salts (ZS1-ZS3) and their respective organoselenium compounds (ZC4-ZC6) were synthesized and characterized using various techniques, including UV-visible, FTIR and FT-NMR (H and C) spectroscopy.
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