Xue Mei

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...