A crystalline germanate with mesoporous 30-ring channels.

A novel germanate |C6N2H18|30[Ge9O18X4]6[Ge7O14X3]4[Ge7O14.42X2.58]8[GeX2]1.73 (X = OH, F) with 30-ring channels built from Ge7O14X3 (Ge7) and Ge9O18X4 (Ge9) clusters was obtained under solvothermal conditions. It has a mesoporous pore of 13.0 × 21.4 A2, which represents the largest pore ring found in crystalline open-framework materials. The framework can be described as a 3-D net structure and viewed as introducing Ge7 and Ge9 clusters into the 4,8-heterocoordinated csq net.