Five facile designing routes for non-centrosymmetric NLO iodates are outlined, including polymerization, aliovalent substitution, fluorine substitution, and hybrid integration with π-conjugated or tetrahedral units.
Herein, the first F-containing iodate-phosphate, namely Ba2Ga2F6(IO3)(PO4), was prepared via a hydrothermal reaction, in which HPF6 (70 wt% solution in water) was used as the source of both fluoride and phosphate anions for the first time.
Ga(IO3)3 was successfully obtained with balanced performance between band gap and second harmonic generation response.
Two new vanadium oxyfluoride–iodate birefringent materials, Sr[VO2F(IO3)2] and Sr3F2(VO2F4)(IO3), have been successfully synthesized. These two compounds exhibit high birefringences with values of 0.250 and 0.406 at 550 nm, respectively.
Two novel tin iodates, Ba[Sn(IO3)6] and Ba[Sn(IO3)4F2], were synthesized, and fluoride regulation improved the birefringence and band gap of Ba[Sn(IO3)4F2], offering a strategy for high-performance birefringent materials.