Zhang Zhiyuan, Xu Die, Wu Zhencheng, Hu Mei, Su Xin, Huang Yineng
Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics, College of Physical Science and Technology, Yili Normal University, Yining, Xinjiang, 835000, China.
Xinjiang Key Laboratory of Solid State Physics and Devices, School of Physical Science and Technology & School of Chemical Engineering and Technology, Xinjiang University, 777 Huarui Street, Urumqi 830017, China.
Dalton Trans. 2023 Oct 17;52(40):14303-14308. doi: 10.1039/d3dt02952b.
The combination of π-conjugated groups [NO] and Cl-centered polyhedra generates a new birefringent crystal with a perovskite-related framework, KRb(NO)Cl, which is the first alkali metal nitrate chloride synthesized by a mild hydrothermal method. It crystallizes in the orthorhombic space group (no. 55). In addition, KRb(NO)Cl crystals with dimensions up to 7 × 1.5 × 1 mm were grown. Notably, KRb(NO)Cl has a short UV cut-off edge (below 228 nm) and a significantly enhanced birefringence (Δ = 0.084 at 1064 nm). Theoretical calculations indicate that the birefringence enhancement mainly derives from π-conjugated [NO] plane triangles.
π共轭基团[NO]与以Cl为中心的多面体相结合，生成了一种具有钙钛矿相关骨架的新型双折射晶体KRb(NO)Cl，这是通过温和水热法合成的第一种碱金属硝酸氯化物。它结晶于正交空间群（编号55）。此外，还生长出了尺寸达7×1.5×1毫米的KRb(NO)Cl晶体。值得注意的是，KRb(NO)Cl具有较短的紫外截止边缘（低于228纳米）和显著增强的双折射（在1064纳米处Δ = 0.084）。理论计算表明，双折射增强主要源于π共轭[NO]平面三角形。
