Yb8Ge3Sb5 is a nonclassical Zintl phase with metallic properties arising from the electropositive "spectator" cations of Yb. This compound contains the new Zintl anion 1infinity(Ge3)4- and is stabilized via a combination of Yb2+ and Yb3+ ions.
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http://dx.doi.org/10.1021/ja0395487 | DOI Listing |
ACS Omega
January 2025
Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.
Zintl compounds have garnered research interest due to their diverse technological applications. Utilizing first-principles calculations, we performed a systematic study of ABX (A = Li, Na, K, Rb, or Cs; B = Si, Ge, Sn, or Pb; and X = P, As, Sb, or Bi) Zintl materials with the 6 KSnSb-type structure. Notably, six ABX Zintl compounds (RbSiBi, CsSiBi, LiGeBi, KGeBi, RbGeBi, and CsGeBi) were found to have topologically nontrivial phases, as demonstrated by the invariant computed using the hybrid functional HSE06.
View Article and Find Full Text PDFNat Commun
December 2024
Department of Chemistry, TUM School of Natural Sciences, Technical University of Munich (TUM), Lichtenbergstraße 4, D-85748, Garching, Germany.
Silicon is by far the most important semiconducting material. However, solution-based synthetic approaches for unsaturated silicon-rich molecules require less efficient multi-step syntheses. We report on a straightforward access to soluble, polyhedral Si clusters from the binary phase KSi, which contains both [Si] and [Si] clusters.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Ernst-Berl-Institute of Technical and Macromolecular Chemistry, Technical University of Darmstadt, Peter-Grünberg-Straße 8, 64287 Darmstadt, Germany.
Hyper-cross-linked polymers (HCPs) enable the tailored synthesis of functionalized materials and provide a versatile design strategy for porous macroligands. Based on the prototypical triphenylphosphine (PPh) monomer, we investigate the role of the involved cross-linking reagents in the formation of polyphosphines and evaluate structure-activity relations for application in the catalytic CO hydrogenation: namely by varying the Friedel-Crafts catalyst, the cross-linker unit and the degree of cross-linking. The study of monomeric reactivities shows that phosphines are insufficiently activated by iron chloride catalyzed cross-linking and that the stronger aluminum chloride is required to ensure PPh incorporation.
View Article and Find Full Text PDFChem Mater
December 2024
Department of Chemistry, University of California, One Shields Ave, Davis, California 95616, United States.
Compositional diversity and intriguing structural features have made Zintl phases excellent candidates as thermoelectric materials. Zintl phase with 21-4-18 composition has shown high thermoelectric performance in the mid- to high-temperature ranges. The complex crystal structure and favorable transport properties of these compounds indicate the potential for high thermoelectric efficiency.
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