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1. Electronic stabilization by occupational disorder in the ternary bismuthide Li 3–x–y In x Bi ( x  ≃ 0.14, y  ≃ 0.29)

   https://doi.org/10.1107/S2053229620006439  

   Ovchinnikov, Alexander ; Bobev, Svilen ( June 2020 , Acta Crystallographica Section C Structural Chemistry)

   null (Ed.)

   A ternary derivative of Li 3 Bi with the composition Li 3– x – y In x Bi ( x  ≃ 0.14, y  ≃ 0.29) was produced by a mixed In+Bi flux approach. The crystal structure adopts the space group Fd \overline{3} m (No. 227), with a = 13.337 (4) Å, and can be viewed as a 2 × 2 × 2 superstructure of the parent Li 3 Bi phase, resulting from a partial ordering of Li and In in the tetrahedral voids of the Bi fcc packing. In addition to the Li/In substitutional disorder, partial occupation of some Li sites is observed. The Li deficiency develops to reduce the total electron count in the system, counteracting thereby the electron doping introduced by the In substitution. First-principles calculations confirm the electronic rationale of the observed disorder. 

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2. 2D Homologous Series SrFM n BiS n+2 (M = Pb, Ag 0.5 Bi 0.5 ; n = 0, 1) and Commensurately Modulated Sr 2 F 2 Bi 2/3 S 2

   https://doi.org/10.1021/acs.inorgchem.2c00663  

   Chen, Haijie ; McClain, Rebecca ; Shen, Jiahong ; He, Jiangang ; Malliakas, Christos D. ; Spanopoulos, Ioannis ; Zhang, Chi ; Zhao, Chendong ; Wang, Yang ; Li, Qiang ; et al ( May 2022 , Inorganic Chemistry)
3. Dimetalloylene (M‐E‐M) Complexes of Heavier Main Group Elements Ge, Sn, Pb, Bi via Cleavage of E‐X Bonds (X=N(SiMe 3 ) 2 , O t Bu) with an Iridium Hydride

   https://doi.org/10.1002/chem.202301863  

   Saint‐Denis, Tyler G. ; Zhang, Bowen ; Settineri, Nicholas S. ; Handford, Rex C. ; Hall, Michael B. ; Tilley, T. Don ( July 2023 , Chemistry – A European Journal)

   Reactions of the Ir^Vhydride [^MeBDI^Dipp]IrH₄{BDI=(Dipp)NC(Me)CH(Me)CN(Dipp); Dipp=2,6‐iPr₂C₆H₃} with E[N(SiMe₃)₂]₂(E=Sn, Pb) afforded the unusual dimeric dimetallotetrylenes ([^MeBDI^Dipp]IrH)₂(μ₂‐E)₂in good yields. Moreover, ([^MeBDI^Dipp]IrH)₂(μ₂‐Ge)₂was formed in situ from thermal decomposition of [^MeBDI^Dipp]Ir(H)₂Ge[N(SiMe₃)₂]₂. These reactions are accompanied by liberation of HN(SiMe₃)₂and H₂through the apparent cleavage of an E−N(SiMe₃)₂bond by Ir−H. In a reversal of this process, ([^MeBDI^Dipp]IrH)₂(μ₂‐E)₂reacted with excess H₂to regenerate [^MeBDI^Dipp]IrH₄. Varying the concentrations of reactants led to formation of the trimeric ([^MeBDI^Dipp]IrH₂)₃(μ₂‐E)₃. The further scope of this synthetic route was investigated with group 15 amides, and ([^MeBDI^Dipp]IrH)₂(μ₂‐Bi)₂was prepared by the reaction of [^MeBDI^Dipp]IrH₄with Bi(NMe₂)₃or Bi(OtBu)₃to afford the first example of a “naked” two‐coordinate Bi atom bound exclusively to transition metals. A viable mechanism that accounts for the formation of these products is proposed. Computational investigations of the Ir₂E₂(E=Sn, Pb) compounds characterized them as open‐shell singlets with confined nonbonding lone pairs at the E centers. In contrast, Ir₂Bi₂is characterized as having a closed‐shell singlet ground state.

    

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4. Optical thermal insulation via the photothermal effects of Fe 3 O 4 and Fe 3 O 4 @Cu 2−x S thin films for energy-efficient single-pane windows

   https://doi.org/10.1557/mrc.2020.4  

   Lin, Jou ; Zhao, Yuan ; Shi, Donglu ( March 2020 , MRS Communications)

   To address critical energy issues in civic structures, we have developed a novel concept of optical thermal insulation (OTI) without relying on a conventional thermal intervention medium, such as air or argon, as often used in conventional window systems. We have synthesized the photothermal (PT) materials, such as the Fe 3 O 4 and Fe 3 O 4 @Cu 2− x S nanoparticles, that exhibit strong UV and near-infrared (NIR) absorptions but with good visible transparency. Upon coating the inner surface of the window glass with a PT film, under solar irradiation, the inner surface temperature rises due to the PT effect. Subsequently, the temperature difference, Δ T , is reduced between the single pane and room interior. This leads to lower the thermal loss through a window, reflected by the U -factor, resulting in considerable energy saving without double- or triple-glazing. Comparing with the Fe 3 O 4 coatings, Fe 3 O 4 @Cu 2− x S is spectrally characterized with a much stronger NIR absorbance, contributing to an increased PT efficiency under simulated solar irradiation (0.1 W/cm 2 ). PT experiments are carried out via both white light and monochromic NIR irradiations (785 nm). The parameters associated with the thermal performance of the PT films are calculated, including PT conversion efficiency, specific absorption rate (SAR), and U -factor. Based on the concept of OTI, we have reached an optimum U -factor of 1.46 W/m 2 K for a single pane, which is satisfactory to the DOE requirement (<1.7 W/m 2 K). 

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5. a -axis YBa 2 Cu 3 O 7−x /PrBa 2 Cu 3 O 7−x /YBa 2 Cu 3 O 7−x trilayers with subnanometer rms roughness

   https://doi.org/10.1063/5.0034648  

   Suyolcu, Y. Eren ; Sun, Jiaxin ; Goodge, Berit H. ; Park, Jisung ; Schubert, Jürgen ; Kourkoutis, Lena F. ; Schlom, Darrell G. ( February 2021 , APL Materials)

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