Synthesis, Structure, and Properties of a New Family of Mixed‐Framework Chalcohalide Semiconductors: CdSbS₂X (X: Cl, Br), CdBiS₂X (X: Cl, Br), and CdBiSe₂X (X: Br, I).

Abstract

Chalcohalide Semiconductors: CdSbS2X (X: Cl, Br), CdBiS2X (X: Cl, Br), and CdBiSe2X (X: Br, I). -The new title semiconductors are synthesized by solid state reactions in an intermediate temperature range of 400-430°C. As revealed by single crystal XRD, CdSbS2Cl, CdBiS2Cl, and CdBiSe2Br crystallize in the orthorhombic space group Pnma with Z = 4 and CdSbS 2 Br, CdBiS 2 Br, and CdBiSe 2 I in the monoclinic space group C2/m with Z = 4. Both structure types have slabs built of corner and edge shared Cd-centered CdQ6-xXx (Q: S, Se; X: Cl, Br, I; x = 0, 2, 4) octahedra that resemble the (110) plane of a distorted NaCl-type structure. FTIR spectroscopy indicates that the compounds are transparent in the mid-IR region. UV/VIS spectroscopy reveals band gaps ranging from 1.3 to 2.2 eV, showing a red shift with respect to the corresponding binary cadmium chalcogenides. -(WANG, L.; HUNG, Y.-C.; HWU*, S.-J.; KOO, H.-J.; WHANGBO, M.-H.; Chem.

Partial Geometric Frustration in Inorganic Supramolecular Spin Systems with One-Dimensional Trigonally Aligned Magnetic Chains ∞1(MCl4)2− (M = Fe2+, Co2+)

“…Although lots of metal chalcohalides have been found181920, rare work on magnetic assemblies has been reported in such systems, except MnPnQ 2 X (Pn = Sb, Bi; Q = S, Se; X = Cl, Br, I)21, Ce 53 Fe 12 S 90 × 3 (X = Cl, Br, I)22, Ba 4 Fe 2 I 5 S 4 23, and (Hg 3 Te 2 )(UCl 6 )13.…”