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1. Ni 2 P‐Modified Ta 3 N 5 and TaON for Photocatalytic Nitrate Reduction

   https://doi.org/10.1002/cnma.202000174  

   Wei, Lin ; Adamson, Marquix A. S. ; Vela, Javier ( May 2020 , ChemNanoMat)

   Self‐sustaining photocatalytic NO₃⁻reduction systems could become ideal NO₃⁻removal methods. Developing an efficient, highly active photocatalyst is the key to the photocatalytic reduction of NO₃⁻. In this work, we present the synthesis of Ni₂P‐modified Ta₃N₅(Ni₂P/Ta₃N₅), TaON (Ni₂P/TaON), and TiO₂(Ni₂P/TiO₂). Starting with a 2 mM (28 g/mL NO₃⁻−N) aqueous solution of NO₃⁻, as made Ni₂P/Ta₃N₅and Ni₂P/TaON display as high as 79% and 61% NO₃⁻conversion under 419 nm light within 12 h, which correspond to reaction rates per gram of 196 μmol g⁻¹ h⁻¹and 153 μmol g⁻¹ h⁻¹, respectively, and apparent quantum yields of 3–4%. Compared to 24% NO₃⁻conversion in Ni₂P/TiO₂, Ni₂P/Ta₃N₅and Ni₂P/TaON exhibit higher activities due to the visible light active semiconductor (SC) substrates Ta₃N₅and TaON. We also discuss two possible electron migration pathways in Ni₂P/semiconductor heterostructures. Our experimental results suggest one dominant electron migration pathway in these materials, namely: Photo‐generated electrons migrate from the semiconductor to co‐catalyst Ni₂P, and upshift its Fermi level. The higher Fermi level provides greater driving force and allows NO₃⁻reduction to occur on the Ni₂P surface.

    

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2. Visualizing the alignment of lone pair electrons in La 3 AsS 5 Br 2 and La 5 As 2 S 9 Cl 3 to form an acentric or centrosymmetric structure

   https://doi.org/10.1039/D3CE00834G  

   Cicirello, Andrea ; Swindle, Andrew ; Wang, Jian ( November 2023 , CrystEngComm)

   Heteroanionic chalcohalides La₃AsS₅Br₂and La₅As₂S₉Cl₃exhibit a good example of how alignment of lone pair electrons affects the formation of acentric crystal structure.

    

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3. Single crystal synthesis and properties of the two-dimensional van der Waals frustrated magnets, Mn 2 In 2 Se 5 and Mn 2 Ga 2 S 5

   https://doi.org/10.1039/D3TC03550F  

   Williams, Archibald J ; Reifsnyder, Alexander ; Yu, Bowen ; Moore, Curtis E ; Susner, Michael A ; Windl, Wolfgang ; McComb, David W ; Goldberger, Joshua E ( February 2024 , Journal of Materials Chemistry C)

   We establish the synthesis, physical properties, and highly-frustrated magnetism of Mn₂In₂Se₅and Mn₂Ga₂S₅van der Waals crystals.

    

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4. Crystal and Electronic Structure and Optical Properties of AE 2 SiP 4 ( AE = Sr, Eu, Ba) and Ba 4 Si 3 P 8

   https://doi.org/10.1002/zaac.201800430  

   Mark, Justin ; Dolyniuk, Juli‐Anna ; Tran, Nhon ; Kovnir, Kirill ( November 2018 , Zeitschrift für anorganische und allgemeine Chemie)

   Three new compounds in theAE‐Si‐P (AE= Sr, Eu, Ba) systems are reported. Sr₂SiP₄and Eu₂SiP₄, the first members of their respective ternary systems, are isostructural to previously reported Ba₂SiP₄and crystallize in the noncentrosymmetricI42d(no. 122) space group. Ba₄Si₃P₈crystallizes in the new structure type, inP2₁/c(no. 14) space group,mP‐120 Pearson symbol, Wyckoff sequencee³⁰. In the crystal structures of Sr₂SiP₄and Eu₂SiP₄all SiP₄tetrahedral building blocks are connected via formation of P–P bonds forming a three‐dimensional framework. In the crystal structure of Ba₄Si₃P₈, Si‐P tetrahedral chains formed by corner‐sharing, edge‐sharing, and P–P bonds are surrounded by Ba cations. This results in a quasi‐one‐dimensional structure. Electronic structure calculations and UV/Vis measurements suggest that theAE₂SiP₄(AE= Sr, Eu, Ba) are direct bandgap semiconductors with bandgaps of ca. 1.4 eV and have potential for thermoelectric applications.

    

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5. Facile Synthesis of (C 6 F 5 ) 2 BBr and (C 6 F 5 ) 2 BX(OEt 2 ) (X=Cl, Br) using Hydrogen Halides and Piers’ Borane

   https://doi.org/10.1002/zaac.202300007  

   Wong, Anthony ; Alcántara, Gustavo ; Avalos, Matthew ; Wu, Guang ; Ménard, Gabriel ( March 2023 , Zeitschrift für anorganische und allgemeine Chemie)

   We report the facile and efficient synthesis of common electrophilic haloboranes via a protonolysis reaction between Piers’ borane, HB(C₆F₅)₂, and H−X (X=Cl, Br). This route benefits from fast reaction times, easy setup, and minimal workup to yield the analytically pure etherates, (C₆F₅)₂BCl(OEt₂) (1) and (C₆F₅)₂BBr(OEt₂) (2), as well as the ether‐free tri‐coordinate species, (C₆F₅)₂BBr (3).

    

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