KRb2(NO3)2Cl: a new birefringent crystal exhibiting a perovskite-related framework and a short cutoff edge

The combination of π-conjugated groups [NO3] and Cl-centered polyhedra generates a new birefringent crystal with a perovskite-related framework, KRb2(NO3)2Cl, which is the first alkali metal nitrate chloride synthesized by a mild hydrothermal method. It crystallizes in the orthorhombic space group p...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2023-10, Vol.52 (40), p.14303-14308
Main Authors: Zhang, Zhiyuan, Xu, Die, Wu, Zhencheng, Hu, Mei, Su, Xin, Huang, Yineng
Format: Article
Language:English
Subjects:
Birefringence
Crystals
Hydrothermal crystal growth
Perovskites
Triangles
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Summary:The combination of π-conjugated groups [NO3] and Cl-centered polyhedra generates a new birefringent crystal with a perovskite-related framework, KRb2(NO3)2Cl, which is the first alkali metal nitrate chloride synthesized by a mild hydrothermal method. It crystallizes in the orthorhombic space group pbam (no. 55). In addition, KRb2(NO3)2Cl crystals with dimensions up to 7 × 1.5 × 1 mm3 were grown. Notably, KRb2(NO3)2Cl has a short UV cut-off edge (below 228 nm) and a significantly enhanced birefringence (Δn = 0.084 at 1064 nm). Theoretical calculations indicate that the birefringence enhancement mainly derives from π-conjugated [NO3] plane triangles.
ISSN:1477-9226
1477-9234
DOI:10.1039/d3dt02952b