Sangen Zhao

Breaking the tetrahedral constraint of tetracoordination: Square-planar [ICl 4 ] enables unprecedented birefringence in [C(NH 2 ) 3 ][ICl 4 ]

Birefringent crystals are indispensable for optoelectronic applications, yet commercially available crystals still suffer from the drawback of insufficient birefringence. Meanwhile, tetracoordination units—traditionally confined to a tetrahedral geometry—have long been sidelined...

Record‐High Birefringence Achieved by Linearly Extended π‑Conjugated Building Blocks in Metal‐Free Sulfate

ABSTRACT The advancement of birefringent materials is critical for next‐generation integrated photonics, yet conventional systems face intrinsic limitations in birefringence magnitude. Sulfate crystals offer a promising platform but have been hindered by their dependence on speci...