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Abstract
AbstractThe chiral sulfide Sm4InSbS9 was prepared from a stoichiometric mixture of the elements at 1223 K in an evacuated silica tube. It crystallizes in the chiral tetragonal space group P43212 with a = 10.0042(4) Å, c = 27.6810(15) Å, V = 2770.4(2) Å3, and Z = 8. The structure features infinite helical chains of [In2Sb2S1110–]∞ propagating along the c direction that are separated by Sm3+ cations and S2– anions. It shows the second harmonic generation with an intensity of 0.75 times that of benchmark AgGaS2 at 2.05 µm laser in type I phase matchable behavior. UV/Vis diffuse reflectance spectroscopy study shows its optical gap of around 2.13 eV.
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