Polymers of Intrinsic Microporosity derived from a carbocyclic analogue of Tröger's base

摘要: Troger's base (TB) is often used as a building block for the synthesis of Polymers Intrinsic Microporosity (PIMs) due to its rigid bicyclic V-shaped structure. In this study TB component in structure PIM replaced by 2,3:6,7-dibenzobicyclo[3.3.1]nonane, purely carbocyclic analogue TB. This modification results only slightly reduced amount microporosity determined using nitrogen adsorption. Further comparisons with previously reported PIMs indicate that unit (and therefore TB) significantly less effective generation intrinsic than spirobisindane, commonly structural synthesis. It appears V-shape 2,3:6,7-dibenzobicyclo[3.3.1]nonane and units allows closer contact between polymer chains thereby enhancing packing efficiency.