[CH3NH3]4Ga4SbS9S0.28O0.72H: A Three-Dimensionally Open-Framework Heterometallic Chalcogenidoantimonate Exhibiting Ni2+ Ion-Exchange Property

Graphical Why don′t you give me a nickel? An organically templated three-dimensional Ga-Sb-S compound is reported that exhibits a Ni 2+ ion-exchange property, namely, [CH 3 NH 3 ] 4 Ga 4 SbS 9 QH (Q=S/O) ( 1 ). An open-framework chalcogenidoantimonate, namely, [CH 3 NH 3 ] 4 Ga 4 SbS 9 S 0.28 O 0.72 H ( 1 ), has been solvothermally synthesized and structurally characterized. Interestingly, 1 showed Ni 2+ ion-exchange properties and wide pH resistance, with a maximum exchange capacity of 76.9 mg g −1 . To the best of our knowledge, this is the first example of amine-directed three-dimensional (3D) heterometallic chalcogenidometalates for highly selective Ni 2+ ion capture with a high distribution coefficient ( K d =1.65×10 5 mL g −1 ).