The scandium analogue of the flexible terephthalate MIL-53 yields a novel closed pore structure upon removal of guest molecules which has unusual thermal behaviour and stepwise opening during CO(2) adsorption. By contrast, the nitro-functionalised MIL-53(Sc) cannot fully close and the structure possesses permanent porosity for CO(2).
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http://dx.doi.org/10.1039/c1dt11729g | DOI Listing |
J Am Chem Soc
September 2024
Department of Chemistry, University of California, Irvine, California 92697-2025, United States.
Treatment of the scandium(II) metallocene CpSc (Cp = CHBu) with CO or the isocyanide CNXyl (Xyl = CHMe-2,6) yields the carbonyl complex CpSc(CO), , or the isocyanide complex CpSc(CNXyl), , which were identified by X-ray crystallography. Isotopic labeling with CO shows the CO stretch of at 1875 cm shifts to 1838 cm in . The CN stretch in is shifted to 1939 cm compared to 2118 cm for the free isocyanide.
View Article and Find Full Text PDFStructure
October 2024
European Molecular Biology Laboratory, 71 avenue des Martyrs, CS 90181, 38042 Grenoble, France. Electronic address:
Enzymes facilitating the transfer of phosphate groups constitute the most extensive protein families across all kingdoms of life. They make up approximately 10% of the proteins found in the human genome. Understanding the mechanisms by which enzymes catalyze these reactions is essential in characterizing the processes they regulate.
View Article and Find Full Text PDFEJNMMI Phys
July 2024
Institute of Radiology and Nuclear Medicine, Luzerner Kantonsspital - LUKS, Lucerne, Switzerland.
Background: Several research groups have explored the potential of scandium radionuclides for theragnostic applications due to their longer half-lives and equal or similar coordination chemistry between their diagnostic and therapeutic counterparts, as well as lutetium-177 and terbium-161, respectively. Unlike the gallium-68/lutetium-177 pair, which may show different in-vivo uptake patterns, the use of scandium radioisotopes promises consistent behaviour between diagnostic and therapeutic radiopeptides. An advantage of scandium's longer half-life over gallium-68 is the ability to study radiopeptide uptake over extended periods and its suitability for centralized production and distribution.
View Article and Find Full Text PDFInorg Chem
July 2024
Center for Computational Quantum Chemistry, University of Georgia, Athens 30602, United States.
The B3LYP and M06-L functionals with the cc-pVTZ basis set are used to study lantern-type binuclear complexes of all the first-row (3d block) metals scandium to zinc in various low-energy spin states, out of which the ground states are predicted. These complexes are studied as models using mostly the unsubstituted formamidinate ligand. For each metal, metal-metal (MM) bond lengths are related to the formal MM bond orders (zero to five), derived by MO analysis and by electron counting.
View Article and Find Full Text PDFInt J Mol Sci
May 2024
Postgraduate Research Institute of Science, Technology, Environment and Medicine, 3021 Limassol, Cyprus.
Scandium (Sc) isotopes have recently attracted significant attention in the search for new radionuclides with potential uses in personalized medicine, especially in the treatment of specific cancer patient categories. In particular, Sc-43 and Sc-44, as positron emitters with a satisfactory half-life (3.9 and 4.
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