New Organically Templated Gallium and Indium Selenites or Selenates with One-, Two-, and Three-Dimensional Structures

The first organically templated gallium and indium selenites or selenates have been synthesized by hydro/solvothermal
methods and structurally characterized. The structure of [H2DABCO][Ga2F6(SeO3)] (1) (DABCO = triethylenediamine) features a
one-dimensional (1D) [Ga2F6(SeO3)]2- chain built from Ga3F3 trinuclear units each capped by a selenite group. The isostructural
compounds [H2en][MF3(SeO3)] (en = ethylenediamine; M = Ga (2), In(3)) contain two-dimensional (2D) inorganic layers of
[MF3(SeO3)]2- anions (M = Ga, In). The structure of [H2pip][GaF(SeO3)(C2O4)]·H2O (4) (pip = piperazine) features a 1D inorganic−organic hybrid chain of [GaF(SeO3)(C2O4)]2- anions in which the oxalate anion is bidentate chelating and the selenite anion is
tridentate bridging. The structure of [H2DABCO]2[Ga4F2(SeO3)6(C2O4)]·4H2O (5) exhibits a three-dimensional (3D) pillared layered
architecture in which the fluorinated gallium selenite layers are further interconnected by bridging oxalate anions (the pillar). [H2en][InF3(SeO4)] (6) features a 1D inorganic chain of [InF3(SeO4)]2- anions. The structure of the indium oxalate-selenate, [H2en]0.5[In(SeO4)(C2O4)(H2O)2] (7), contains a 1D [In(SeO4)(C2O4)(H2O)2]2- anionic chain. The template cations in all compounds are
located at structural voids and are involved in hydrogen bonding (except in compound 4). Compounds 6 and 7 exhibit broad emission
bands at 421 and 434 nm, respectively.