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Updated: Dec 29, 2025
Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
One-Dimensional Double Chains in Sodium-Based Quaternary Chalcogenides Displaying Intriguing Red Emission and Large
Ya Yang1, Kui Wu1, Bingbing Zhang1
1Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science , Hebei University , Baoding 071002 , China.
Abstract:
A new family of Na3AgSnQ4 (Q = S or Se) and Na3MIIInS4 (MII = Cd or Hg) was successfully synthesized in vacuum-sealed silica tubes for the first time. They exhibit similar isolated one-dimensional (1D) double chains {[AgSnQ4] vs [(MII/In)S4]} in their structures. After the detailed survey on the Inorganic Crystal Structure Database, title compounds can be described as the first discovered examples exhibiting novel 1D double-chain configurations in the known 171 (MIB and MIVA) or 48 (MIIB and MIIIA) element-based quaternary A-MIB/MIIB-MIVA/MIIIA-Q chalcogenides. In addition, their dimensionalities on the mode of connection between two anionic groups are closely related to the empirical A/(IB+IVA) and A/(IIB+IIIA) in the unit cell or the (IB+IVA)/Q and (IIB+IIIA)/Q ratios, which may produce a good way to predict and design new chalcogenides with low-dimensional structures. Photoluminescence measurement shows that Na3CdGaS4 and Na3CdInS4 display strong red emission (648 and 647 nm) at room temperature that also agrees well with the change in color from yellow to red under the irradiation of an ultraviolet lamp. Moreover, all of the title crystals exhibit a large optical anisotropy (Δn@1064 nm ≥ 0.13), and isolated 1D double chains may produce a huge effect to enhance optical anisotropy based on the first-principles calculations, which also gives us a feasible way to design new birefringent materials.
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