(Bi-_4I_(16))~(4-) Iodobismuthate Tetramer Directed by Viologen-like Template:Enhanced Absorption Behavior,Optical Gap and Photocurrent Response Property Induced by I···I Interactions

Based on the template of protonated BPDO(B PDO = 4,4'-bipyridine N,N'-dioxide), a new iodobismuthate hybrid with formula of(H_2 DPDO)2(Bi_4 I_(16))(1) was synthesized under solvothermal conditions. The Bi_4 I_(16)~(4-) tetramer is built from four edge-sharing BiI_6 octahedra. I···I interactions stabilize the structure and contribute to the structural extending from 0-D cluster to 1-D chain. The broader absorption band and lower energy gap of 1.76 eV are led by strong I···I interactions, so the small and rigid template can result in strong halogen···halogen interaction, which will be beneficial for its charge transfer. The photocurrent response property of this complex was discussed, and its mechanism has also been proposed.

(Bi4I16)4-Iodobismuthate Tetramer Directed by Viologen-like Template: Enhanced Absorption Behavior,Optical Gap and Photocurrent Response Property Induced by I…I Interactions