Stereochemically active lone-pair-driven giant enhancement of birefringence from three-dimensional CsZn<sub>4</sub>Ga<sub>5</sub>Se<sub>12</sub> to two-dimensional CsZnAsSe<sub>3</sub>
Chao Zhang, Mao‐Yin Ran, Xin Chen, Shenghua Zhou, Hua Lin, Yi Liu
Abstract
A novel 2D quaternary thioarsenate, CsZnAsSe 3 , was obtained by a stereochemically active lone pair (SCALP) induction strategy, which exhibits a 28-fold increase in birefringence compared to the known 3D framework CsZn 4 Ga 5 Se 12 .
Topics & Concepts
Lone pairBirefringenceMaterials scienceCrystallographyOptically activeChemistryOpticsPhysicsMoleculeOrganic chemistryCrystal Structures and PropertiesPerovskite Materials and ApplicationsSolid-state spectroscopy and crystallography