An original samarium(III) complex based on a triazacyclononane platform functionalized with a charge-transfer antenna chromophore exhibited optimized brightness and was successfully used as an emissive species for two-photon microscopy experiments in both the visible and near-infrared spectral ranges.
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Multi-electron redox reactivity of a samarium(ii) hydrido complex.
Chem Sci
July 2024
State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences No. 5625, Renmin Street Changchun 130022 China
Well-defined low-valent molecular rare-earth metal hydrides are rare, and limited to Yb and Eu centers. Here, we report the first example of the divalent samarium(ii) hydrido complex [(Cp)Sm(μ-H)(DABCO)] (4) (Cp = CAr, Ar = 3,5-Pr-CH; DABCO = 1,4-diazabicyclooctane) supported by a super-bulky penta-arylcyclopentadienyl ligand, resulting from the hydrogenolysis of the samarium(ii) alkyl complex [(Cp)Sm{CH(SiMe)}(DABCO)] (3). Complex 4 exhibits multi-electron redox reactivity toward a variety of substrates.
View Article and Find Full Text PDFinvestigations of circularly polarised luminescence in Samarium(III)-based complexes.
Phys Chem Chem Phys
February 2024
Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226, F-35000 Rennes, France.
The present study aims to gain insight into the circularly polarised luminescence (CPL) of lanthanide complexes through the angle of one of their elements, namely Samarium. The simulation of luminescent properties of Samarium(III) complexes remains a challenge for computational chemistry, considering the multiconfigurational character of the electronic structure, the importance of the spin-orbit coupling and the fact that its emissive level is high in energy and preceded by numerous states of various multiplicity. Herein, a methodology based on CASSCF/RASSI-SO calculations is exposed and applied to simulate the CPL properties of two different Samarium(III) complexes, presenting either a rigid or a flexible architecture around the centre ion.
View Article and Find Full Text PDFSynthesis, Crystal Structures, and Optical and Magnetic Properties of Samarium, Terbium, and Erbium Coordination Entities Containing Mono-Substituted Imine Silsesquioxane Ligands.
Inorg Chem
February 2023
Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383Wrocław, Poland.
Mono-substituted cage-like silsesquioxanes of the T-type can play the role of potential ligands in the coordination chemistry. In this paper, we report on imine derivatives as ligands for samarium, terbium, and erbium cations and discuss their efficient synthesis, crystal structures, and magnetic and optical properties. X-ray analysis of the lanthanide coordination entities [MCl(POSS)]·2THF [M = Er (), Tb (), Sm ()] showed that all three compounds crystallize in the same space group with similar lattice parameters.
View Article and Find Full Text PDFanticancer activity of parent and nano-encapsulated samarium(iii) complex towards antimicrobial activity studies and FS-DNA/BSA binding affinity.
RSC Adv
August 2020
Noncommunicable Diseases Research Center, Bam University of Medical Sciences Bam Iran.
Based on the potential anticancer properties of lanthanide complexes, the anticancer activity of the Sm(iii) complex containing a 2,2'-bipyridine ligand (bpy) and its interaction with FS-DNA (Fish-Salmon DNA) and BSA (Bovine Serum Albumin) were examined experimentally and by molecular docking in this paper. Absorption and fluorescence spectroscopic methods were used to define the thermodynamic parameters, binding constant ( ), and the probable binding mechanism. It was concluded that the Sm complex interacts with FS-DNA through a minor groove with a of 10 M.
View Article and Find Full Text PDFHeteroleptic Samarium(III) Chalcogenide Complexes: Opportunities for Giant Exchange Coupling in Bridging σ- and π-Radical Lanthanide Dichalcogenides.
Inorg Chem
June 2020
WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
The introduction of (N) radicals into multinuclear lanthanide molecular magnets raised hysteresis temperatures by stimulating strong exchange coupling between spin centers. Radical ligands with larger donor atoms could promote more efficient magnetic coupling between lanthanides to provide superior magnetic properties. Here, we show that heavy chalcogens (S, Se, Te) are primed to fulfill these criteria.
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