Cation–Cation Interactions between Neptunyl(VI) Units

The boric acid flux reaction of NpO2(ClO4)2 with NaClO4 affords Na­[(NpO2)4B15O24(OH)5(H2O)]­(ClO4)·0.75H2O (NaNpBO-1). NaNpBO-1 possesses a layered structure consisting of double neptunyl­(VI) borate sheets bridged by another NpVI site through cation–cation interactions. The sole presence of NpVI in NaNpBO-1 is supported by absorption and vibrational spectroscopy.高氯酸镎酰(VI)（NpO₂(ClO₄)₂）与高氯酸钠（NaClO₄）经硼酸助熔反应，可制得Na­[(NpO₂)₄B₁₅O₂₄(OH)₅(H₂O)]­(ClO₄)·0.75H₂O（命名为NaNpBO-1）。该化合物具有层状结构，其骨架由双层镎酰(VI)（neptunyl(VI)）硼酸盐片层构成，该片层通过另一Np(VI)位点借助阳离子-阳离子相互作用实现桥连。NaNpBO-1中仅存在Np(VI)的结论，得到了吸收光谱与振动光谱的佐证。