Tetraphenylethylene-based phosphine: tuneable emission and carbon dioxide fixation

Abstract

A tetraphenylethylene-based phosphine, 1,1,2,2-tetrakis((4-diphenylphosphino)phenyl)ethylene (TPE-P4), was synthesized and showed novel aggregation-induced and mechano-responsive emission. A mixture of TPE-P4 and Ag⁺ could fix atmospheric CO₂in situ as carbonate ions in neutral solution to yield a rare 3D metal–organic framework with zeolite-like SOD topology, [Ag₂(TPE-P4)CO₃]_x⊃nH₂O (Ag-TPE-P4). Ag-TPE-P4 showed turn-on luminescence of TPE-P4, emitting bright bluish green light in the solid state.