Organically templated metal germanate: ionothermal synthesis of (C8H24N4)[NbOGe6O13(OH)2F].

A very rare organically templated niobium germanate was synthesized and structurally characterized by single-crystal X-ray diffraction. The crystal shows an intense second harmonic generation signal. It is the first example of the synthesis of organically templated metal germanate using an ionic liquid as a solvent.