胡月桥在Chemistry - A European Journal上发表题为：Direct Observation of Confined I-··· I₂··· I- Interactions in a MetalOrganic Framework: Iodine Capture and Sensing 的论文。

abstract :We report herein a strategy for capturing and sensing iodine by strong I–···I₂···I– interaction confined in a metal-organic framework, [Tb(Cu₄I₄)(ina)₃(DMF)](1) (ina = isonicotinate). As revealed by single-crystal X-ray crystallography, the uptaken I₂ molecules directly contact the {Cu₄I₄}n chains, forming virtually an electronically polarizable tetraiodide anion (I₄^2–) via strong I–···I₂···I– interaction. As such, a quasi-copper-iodide layer of {Cu₄I₅}n with semiconducting characteristics results, leading to a significant enhancement (Δσ = 10⁷ times) in electrical conductivity over the I₂-free 1. The effect observed is several orders of magnitude higher than those reported due to iodine···aromatic interactions (Δσ = 10² times) and by interactions between I₂ and a redox-active metal centre (Δσ = 10⁴ times). The drastic enhancement in electrical conductivity was used to switch on/off an LED bulb, suggesting the possibility of electrically sensing I₂.

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全文链接：DOI：10.1002/chem.201702087