More Like this

1. Large magnetic anisotropy of a decorated spin-chain system K 2 Co 3 (MoO 4 ) 3 (OH) 2

   https://doi.org/10.1039/D4DT00203B  

   Patel, Bhakti K ; Ye, Feng ; Liyanage, W_L_N C ; Buchanan, C Charlotte ; Gilbert, Dustin A ; Kolis, Joseph W ; Sanjeewa, Liurukara D ( April 2024 , Dalton Transactions)

   The paper presents the hydrothermal synthesis, magnetic properties, and magnetic structure characterization of K₂Co₃(MoO₄)₃(OH)₂half sawtooth chains.

    

   more » « less
2. 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.

    

   more » « less
3. 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.

    

   more » « less
4. Electronic Structure of trans‐ [V II Cl 2 (E(CH 3 ) 2 CH 2 CH 2 E(CH 3 ) 2 ) 2 ], E=N, P

   https://doi.org/10.1002/ejic.202400395  

   Jafari, Mehrafshan G ; Zolnhofer, Eva M ; Fehn, Dominik ; Heinemann, Frank W ; Opalade, Adedamola A ; Carroll, Patrick J ; Meyer, Karsten ; Krzystek, J ; Ozarowski, Andrew ; Mindiola, Daniel J ; et al ( November 2024 , European Journal of Inorganic Chemistry)

   Coordination complexes of general formulatrans‐[MX₂(R₂ECH₂CH₂ER₂)₂] (M^II=Ti, V, Cr, Mn; E=N or P; R=alkyl or aryl) are a cornerstone of coordination and organometallic chemistry. We investigate the electronic properties of two such complexes,trans‐[VCl₂(tmeda)₂] andtrans‐[VCl₂(dmpe)₂], which thus representtrans‐[MX₂(R₂ECH₂CH₂ER₂)₂] where M=V, X=Cl, R=Me and E=N (tmeda) and P (dmpe). These V^IIcomplexes haveS=3/2 ground states, as expected for octahedral d³. Their tetragonal distortion leads to zero‐field splitting (zfs) that is modest in magnitude (D≈0.3 cm⁻¹) relative to analogousS=1 Ti^IIand Cr^IIcomplexes. This parameter was determined from conventional EPR spectroscopy, but more effectively from high‐frequency and ‐field EPR (HFEPR) that determined the sign ofDas negative for the diamine complex, but positive for the diphosphine, which information had not been known for anytrans‐[VX₂(R₂ECH₂CH₂ER₂)₂] systems. The ligand‐field parameters oftrans‐[VCl₂(tmeda)₂] andtrans‐[VCl₂(dmpe)₂] are obtained using both classical theory andab initioquantum chemical theory. The results shed light not only on the electronic structure of V^IIin this environment, but also on differences between N and P donor ligands, a key comparison in coordination chemistry.

    

   more » « less
5. 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.

    

   more » « less