Mono- and multinuclear complexes of ruthenium and [n]cycloparaphenylene (CPP, n = 5 and 6) were synthesized in excellent yields through ligand exchange of the cationic complex [(Cp)Ru(CH3CN)3](PF6) with CPP. In the multinuclear complexes, ruthenium selectively coordinated to alternate paraphenylene units to give bis- and tris-coordinated Ru complexes for [5] and [6]CPPs, respectively. Single-crystal X-ray analysis revealed the Ru was coordinated with η(6)-hapticity on the convex surface of CPP.
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http://dx.doi.org/10.1002/anie.201508003 | DOI Listing |
Angew Chem Int Ed Engl
December 2024
Hubei University, School of Materials Science and Engineering, 368, Youyi Street, 430062, Wuhan, 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 ([(dppmAu2)2L1]•PF6-), and a hexadecanuclear cluster, C2 [(dppmAu2)6(Au4)(L1)4]•4PF6-, 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 PDFDalton Trans
December 2024
School of Natural Sciences, Faculty of Science and Engineering, Macquarie University, NSW, 2109, Australia.
The development of the trinuclear platinum(II) complex BBR3464 (also known as triplatin) in the late 1990s was meant to be a revolution in the field of platinum chemotherapy. What made it remarkable was that it defied many of the known structure-activity rules for platinums; it is cationic, has a single labile leaving group on each terminal platinum, and it binds DNA in ways different to mononuclear platinum drugs, like cisplatin and oxaliplatin. The flexible, long-range adducts the drug forms with DNA means that it showed activity in cancers not typically sensitive to platinums, and more importantly, BBR3464 demonstrated an ability to overcome acquired resistance to platinum drugs.
View Article and Find Full Text PDFMolecules
December 2024
School of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, UK.
A series of homoleptic rare earth (RE) complexes bearing phosphino-aryloxide ligands (, ) has been prepared. The complexes have been characterised using multinuclear NMR and IR spectroscopy, X-ray crystallography and elemental analysis. Structural characterisation highlighted the different RE-P interactions as a result of differing Lewis acidity and ionic size across the series, hinting at the possibility of FLP-type activity.
View Article and Find Full Text PDFDalton Trans
December 2024
Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India.
Electrochemical water oxidation holds immense potential for sustainable energy generation, splitting water into clean-burning hydrogen and life-giving oxygen. However, a key roadblock lies in the sluggish nature of the oxygen evolution reaction (OER). Finding stable, cost-effective, and environmentally friendly catalysts with high OER efficiency is crucial to unlock this technology's full potential.
View Article and Find Full Text PDFJ Phys Chem B
December 2024
Department of Materials Science and Engineering, University of California, Davis, California 95616, United States.
Silicate-based adsorbents offer significant advantages over traditional materials, particularly due to their superior thermal and chemical stability, enhanced regenerability, and the ability to endure more rigorous operating conditions. In this study, an amorphous Na-Ca-magnesium silicate adsorbent (SAAM) and its g-CN-modified counterpart (gCN-SAAM) were synthesized via alkali activation and a subsequent thermal process, respectively. The g-CN modification resulted in a novel hybrid adsorbent with a remarkable methylene blue (MB) adsorption capacity of 420 mg g, four times higher than the unmodified sample, setting a new benchmark.
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