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Showing 1–6 of 6 results
Advanced filters: Author: George E. Cutsail Clear advanced filters

  • While most biological and biomimetic mixed-valent [2Fe-2S]+ clusters exhibit a S = 1/2 ground spin state, substitutions with Se and Te significantly perturb the electronic structure and yield clear S = 3/2 spin state signatures. Here, the authors probe the vibrational dynamics of the Fe and Te centers using 57Fe and 125Te nuclear resonance vibrational spectroscopy and DFT calculations.

    • Aleksa Radović
    • Justin T. Henthorn
    • George E. Cutsail III
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-14

  • Despite extensive investigations of mixed-valence complexes, molecules with intermediate spin states have remained elusive. Now, selenium- and tellurium-bridged mixed-valent iron dimers have been prepared in which a balance of Heisenberg exchange and double-exchange coupling of the unpaired electron, combined with moderate vibronic contributions, stabilizes S = 3/2 ground spin states.

    • Justin T. Henthorn
    • George E. Cutsail III
    • Serena DeBeer
    ResearchOpen Access
    Nature Chemistry
    Volume: 14, P: 328-333

  • Radicals of heavy main-group elements represent important intermediates in chemical synthesis, yet few have been isolated. Here the authors stabilize neutral stibinyl and bismuthinyl radicals using gallium-based ligands, and reduce the former to afford a Ga=Sb double bond-containing complex.

    • Chelladurai Ganesamoorthy
    • Christoph Helling
    • Stephan Schulz
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-8

  • By obtaining structural snapshots of the catalytic cycle of NADH:quinone oxidoreductase from Vibrio cholerae, the authors uncover its mechanism. They show how electrons are shuttled and determine the importance of the [2Fe-2S] cluster in the movement of the electron transfer switch.

    • Jann-Louis Hau
    • Susann Kaltwasser
    • Günter Fritz
    ResearchOpen Access
    Nature Structural & Molecular Biology
    Volume: 30, P: 1686-1694

  • Chalcogenide radical cations are usually short-lived intermediates, making their isolation challenging. Here, the authors report the stabilization of these species by using the MSFluind (dispiro[fluorene-9,3’-(1’,1’,7’,7’-tetramethyl-s-hydrindacen-4’-yl)-5’,9”-fluorene]) substituent to produce [MSFluindPhE][B(C6F5)4] (E = S, Se, Te) radical cation salts, which they characterize using electron paramagnetic spectroscopy, cyclic voltammetry, optical absorption spectroscopy, single crystal X-ray diffraction and quantum mechanical computations.

    • Pascal Komorr
    • Corina Stoian
    • Jens Beckmann
    ResearchOpen Access
    Communications Chemistry
    Volume: 8, P: 1-8

  • Lytic polysaccharide monooxygenases (LPMOs) are mono copper enzymes with outstanding industrial applicability. Here, the authors investigate the “hole hopping” mechanism in a bacterial LPMO and show that a strictly conserved tryptophan is critical for radical formation and hole transference, as well as reveal a correlation between the efficiency of hole transference and enzyme performance under oxidative stress.

    • Iván Ayuso-Fernández
    • Tom Z. Emrich-Mills
    • Vincent G. H. Eijsink
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-15