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Four homodinuclear complexes of Ni(II)-Ni(II), Cu(II)-Cu(II), Co(II)-Co(II) and Co(III)-Co(II) and five heterodinuclear complexes of Co(III)-Zn(II), Co(III)-Cu(II), Co(III)-Ni(II), Cu(II)-Zn(II) and Zn(II)-Cu(II) with the octadentate Schiff base compartmental ligand 1,8-N-bis(3-carboxy)disalicylidene-3,6-diazaoctane-1,8-diamine (H4fsatrien) have been synthesized. The complexes have been characterized with the help of elemental analyses, molecular weights, molar conductances, magnetic susceptibilities and spectroscopic (UV-vis, IR, ESR) data. Cryomagnetic data also helped to elucidate the structural features of the Cu(II) complexes.
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http://dx.doi.org/10.1016/j.saa.2008.06.002 | DOI Listing |
Chem Sci
August 2025
Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT) Kaiserstr. 12 Karlsruhe 76131 Germany
Recently, we discovered that silaiminyl-silylene, [LSi-Si(NDipp)L] (L = PhC(NBu), Dipp = 2,6-diisopropylphenyl), can be converted from a mono-silylene to bis-silylene by using Lewis acids. This revelation led us to further use silaiminyl-silylene as a silylene-based ligand, which can coordinate to one metal center and later, on demand, release one more silylene center to coordinate to a second metal. Furthermore, an insight into the mechanism of this unusual rearrangement reaction is presented.
View Article and Find Full Text PDFACS Org Inorg Au
August 2025
Université Grenoble Alpes, UMR CNRS 5250, Département de Chimie Moléculaire, 38000 Grenoble, France.
With the aim of enhancing the HER activity of the previously described bioinspired [NiFe]-hydrogenase complex [LNiFeCp-(CO)] (, with L = 2,2'-(2,2'-bipyridine-6,6'-diyl)-bis-(1,1'-diphenylethanethiolate) and Cp = cyclopentadienyl), the electronic structure of the L site has been fine-tuned. In , the bipyridine (Bpy) unit was substituted with methoxy electron-donating groups, while in , the Bpy unit was replaced with the 1,10-phenanthroline backbone. These complexes were fully characterized, and their HER activity was investigated.
View Article and Find Full Text PDFAcc Chem Res
August 2025
School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Guangdong 518107, P. R. China.
ConspectusPhotodynamic therapy (PDT), which uses a photosensitizer (PS) to produce reactive oxygen species (ROS), has attracted great attention for cancer therapy. However, the hypoxic microenvironment within solid tumors strongly inhibits the PDT efficiency. Therefore, developing novel phototherapeutic strategies is urgently needed.
View Article and Find Full Text PDFChem Sci
July 2025
Organic Chemistry and Catalysis, Institute for Sustainable and Circular Chemistry, Faculty of Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
We report the synthesis, isolation, and characterisation of an N-heterocyclic germylene (NHGe) derived from a two-electron reduced Mg-synthon of the redox-active NBA ligand. This NHGe features a vacant binding pocket capable of coordinating various metals, which enables the formation of heterobimetallic Ge-Zn and Ge-Mg complexes. Electronic structure calculations reveal that the Ge-Zn interactions are weak, whilst the interactions between the metals found for the heterodinuclear Ge-Mg complex are stronger.
View Article and Find Full Text PDFJ Am Chem Soc
June 2025
Department of Molecular Chemistry (DCM), UMR 5250, Université Grenoble Alpes (UGA), 38000 Grenoble, France.
Developing efficient photocatalytic systems for sustainable H production is a crucial step toward reducing dependence on fossil fuels. While extensive research over the past two decades has focused on bioinspired FeFe catalysts, NiFe-based systems remain largely unexplored. This study addresses that gap by introducing the first heterodinuclear NiFe complex capable of catalyzing H production under photoassisted conditions.
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