Host–Guest Conversion: Transformation of Diiodomethane within 1D-Ensemble Suprachannels into Triiodide–Iodine Channel via Photoreaction

摘要

Self-assembly of ZnBr_(2) with 2,7-bis(isonicotinoyloxy)naphthalene (L) yields one-dimensional (1D) zigzag chains of [ZnBr_(2)L] composition. This 1D chain ensemble forms unique suprachannels of 4.0 × 4.2 ?~(2) size via weak C–H···π and π···π interactions. A 350 nm ultraviolet irradiation affects host–guest conversion. Diiodomethane molecules within the suprachannel structure of CHCl_(3)·CH_(2)I_(2)@[ZnBr_(2)L] were transformed into an unprecedented triiodide–iodine channel skeleton, HL~(+)@[I_(3)·I_(2)]~(?). Specifically, two clear, quasi-reversible redox peaks were observed at +0.33 and +0.70 V versus Ag/AgCl in the anodic scan and at +0.19 and +0.62 V in the cathodic scan in acetonitrile for HL~(+)@[I_(3)·I_(2)]~(?).