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1. Z -selective dimerization of terminal alkynes by a (PNNP)Fe ^II complex

   https://doi.org/10.1039/D4CC00469H  

   Stevens, Jeremiah E; Miller, Justin D; Fitzsimmons, Matthew C; Moore, Curtis E; Thomas, Christine M (May 2024, Chemical Communications)

   A (PNNP)Fe^IIcomplex is shown to catalyze the dimerization of terminal alkynesviaa metal–ligand cooperative mechanism. 

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2. Site-Differentiated Mn ^II Fe ^II Complex Reproducing the Selective Assembly of Biological Heterobimetallic Mn/Fe Cofactors

   https://doi.org/10.1021/jacs.2c11930  

   Poptic, Anna L.; Chen, Ying-Pin; Chang, Tieyan; Chen, Yu-Sheng; Moore, Curtis E.; Zhang, Shiyu (February 2023, Journal of the American Chemical Society)
3. Electronic Structure of Three-Coordinate Fe ^II and Co ^II β-Diketiminate Complexes

   https://doi.org/10.1021/acs.inorgchem.3c03388  

   Nagelski, Alexandra L; Ozerov, Mykhaylo; Fataftah, Majed S; Krzystek, J; Greer, Samuel M; Holland, Patrick L; Telser, Joshua (March 2024, Inorganic Chemistry)
4. Charge transfer and slow magnetic relaxation in a series of cyano-bridged FeIII4MII2 (M = Fe ^II , Co ^II , Ni ^II ) molecules

   https://doi.org/10.1039/c8qi01245h  

   Wang, Jin-Hua; Vignesh, Kuduva R.; Zhao, Jia; Li, Zhao-Yang; Dunbar, Kim R. (February 2019, Inorganic Chemistry Frontiers)

   The synthesis, single-crystal structures and magnetic properties of three new cyano-bridged complexes [FeIII4MII2] (M = Fe II , Co II , Ni II ) are reported. Electronic absorption spectroscopy reveals the occurrence of intervalence charge transfer for [FeIII4FeII2]. Field-induced slow magnetic relaxation behavior is exhibited for [FeIII4CoII2] and [FeIII4NiII2] which originates from the ferromagnetic interactions between Fe III and M II spin centers of the square. 

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5. Encapsulation of tricopper cluster in a synthetic cryptand enables facile redox processes from Cu ^I Cu ^I Cu ^I to Cu ^II Cu ^II Cu ^II states

   https://doi.org/10.1039/D0SC05441K  

   Zhang, Weiyao; Moore, Curtis E.; Zhang, Shiyu (March 2021, Chemical Science)

   null (Ed.)

   One-pot reaction of tris(2-aminoethyl)amine (TREN), [Cu I (MeCN) 4 ]PF 6 , and paraformaldehyde affords a mixed-valent [ TREN4 Cu II Cu I Cu I (μ 3 -OH)](PF 6 ) 3 complex. The macrocyclic azacryptand TREN4 contains four TREN motifs, three of which provide a bowl-shape binding pocket for the [Cu 3 (μ 3 -OH)] 3+ core. The fourth TREN caps on top of the tricopper cluster to form a cryptand, imposing conformational constraints and preventing solvent interaction. Contrasting the limited redox capability of synthetic tricopper complexes reported so far, [ TREN4 Cu II Cu I Cu I (μ 3 -OH)](PF 6 ) 3 exhibits several reversible single-electron redox events. The distinct electrochemical behaviors of [ TREN4 Cu II Cu I Cu I (μ 3 -OH)](PF 6 ) 3 and its solvent-exposed analog [ TREN3 Cu II Cu II Cu II (μ 3 -O)](PF 6 ) 4 suggest that isolation of tricopper core in a cryptand enables facile electron transfer, allowing potential application of synthetic tricopper complexes as redox catalysts. Indeed, the fully reduced [ TREN4 Cu I Cu I Cu I (μ 3 -OH)](PF 6 ) 2 can reduce O 2 under acidic conditions. The geometric constraints provided by the cryptand are reminiscent of Nature's multicopper oxidases (MCOs). For the first time, a synthetic tricopper cluster was isolated and fully characterized at Cu I Cu I Cu I ( 4a ), Cu II Cu I Cu I ( 4b ), and Cu II Cu II Cu I ( 4c ) states, providing structural and spectroscopic models for many intermediates in MCOs. Fast electron transfer rates (10 5 to 10 6 M −1 s −1 ) were observed for both Cu I Cu I Cu I /Cu II Cu I Cu I and Cu II Cu I Cu I /Cu II Cu II Cu I redox couples, approaching the rapid electron transfer rates of copper sites in MCO. 

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