Presented is an antimony-based photoluminescent material, namely [Bmim]₂SbCl₅, exhibiting bright yellow and white light photoluminescence with quantum yield as high as 86.3%.

A layered thiostannate with remarkable Cs⁺ and Sr²⁺ ion-exchange performance was synthesized on a large scale by a facile, one-pot, economical solvothermal method.

Radiocesium remediation is desirable for ecological protection, human health and sustainable development of nuclear energy. Effective capture of Cs⁺ from acidic solutions is still challenging, mainly due to the low stability of the adsorbing materials and the competitive adsorption of protons. Herein, the rapid and highly selective capture of Cs⁺ from strongly acidic solutions is achieved by a robust K⁺-directed layered metal sulfide KInSnS₄ (InSnS-1) that exhibits excellent acid and radiation resistance. InSnS-1 possesses high adsorption capacity for Cs⁺ and can serve as the stationary phase in ion exchange columns to effectively remove Cs⁺ from neutral and acidic solutions. The adsorption of Cs⁺ and H₃O⁺ is monitored by single-crystal structure analysis, and thus the underlying mechanism of selective Cs⁺ capture from acidic solutions is elucidated at the molecular level.