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1. Exploring the Threshold between Fullerenes and Nanotubes: Characterizing Isomerically Pure, Empty-Caged, and Tubular Fullerenes D _5h -C ₉₀ and D _5d -C ₁₀₀

   https://doi.org/10.1021/jacs.2c02442  

   Schüßlbauer, Christoph M.; Krug, Marcel; Ullrich, Tobias; Franklin, Hannah M.; Stevenson, Steven; Clark, Timothy; Guldi, Dirk M. (June 2022, Journal of the American Chemical Society)
2. Semiconducting and Metallic [5,5] Fullertube Nanowires: Characterization of Pristine D _5h (1)-C ₉₀ and D _5d (1)-C ₁₀₀

   https://doi.org/10.1021/jacs.0c11357  

   Stevenson, Steven; Liu, Xiaoyang; Sublett, D. Mathew; Koenig, Ryan M.; Seeler, Tiffany L.; Tepper, Katelyn R.; Franklin, Hannah M.; Wang, Xiaoling; Huang, Rong; Feng, Xu; et al (March 2021, Journal of the American Chemical Society)

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3. H/D exchange under mild conditions in arenes and unactivated alkanes with C ₆ D ₆ and D ₂ O using rigid, electron-rich iridium PCP pincer complexes

   https://doi.org/10.1039/D0SC02694H  

   Smith, Joel D.; Durrant, George; Ess, Daniel H.; Gelfand, Benjamin S.; Piers, Warren E. (January 2020, Chemical Science)

   The synthesis and characterization of an iridium polyhydride complex ( Ir-H4 ) supported by an electron-rich PCP framework is described. This complex readily loses molecular hydrogen allowing for rapid room temperature hydrogen isotope exchange (HIE) at the hydridic positions and the α-C–H site of the ligand with deuterated solvents such as benzene-d 6 , toluene-d 8 and THF-d 8 . The removal of 1–2 equivalents of molecular H 2 forms unsaturated iridium carbene trihydride ( Ir-H3 ) or monohydride ( Ir-H ) compounds that are able to create further unsaturation by reversibly transferring a hydride to the ligand carbene carbon. These species are highly active hydrogen isotope exchange (HIE) catalysts using C 6 D 6 or D 2 O as deuterium sources for the deuteration of a variety of substrates. By modifying conditions to influence the Ir-Hn speciation, deuteration levels can range from near exhaustive to selective only for sterically accessible sites. Preparative level deuterations of select substrates were performed allowing for procurement of >95% deuterated compounds in excellent isolated yields; the catalyst can be regenerated by treatment of residues with H 2 and is still active for further reactions. 

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4. Magnetic properties of the Ising-like rare earth pyrosilicate: D-Er ₂ Si ₂ O ₇

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5. Enhanced Superconductivity in Monolayer T _d -MoTe ₂

   https://doi.org/10.1021/acs.nanolett.0c04935  

   Rhodes, Daniel A.; Jindal, Apoorv; Yuan, Noah F.; Jung, Younghun; Antony, Abhinandan; Wang, Hua; Kim, Bumho; Chiu, Yu-che; Taniguchi, Takashi; Watanabe, Kenji; et al (March 2021, Nano Letters)

   Kim, Philip (Ed.)

   Crystalline two-dimensional (2D) superconductors (SCs) with low carrier density are an exciting new class of materials in which electrostatic gating can tune superconductivity, electronic interactions play a prominent role, and electrical transport properties may directly reflect the topology of the Fermi surface. Here, we report the dramatic enhancement of superconductivity with decreasing thickness in semimetallic Td-MoTe2, with critical temperature (Tc) increasing up to 7.6 K for monolayers, a 60-fold increase with respect to the bulk Tc. We show that monolayers possess a similar electronic structure and density of states (DOS) as the bulk, implying that electronic interactions play a strong role in the enhanced superconductivity. Reflecting the low carrier density, the critical temperature, magnetic field, and current density are all tunable by an applied gate voltage. The response to high in-plane magnetic fields is distinct from that of other 2D SCs and reflects the canted spin texture of the electron pockets. 

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