Abstract
The effect of cucurbit[7]uril (CB7) complexation on the solubility, thermal, optical, electrochemical, morphological, and electrical properties of poly(3,4‐ethylenedioxythiophene) (PEDOT) was investigated. For this purpose, PEDOT polypseudorotaxane (PEDOT·CB7‐PS) was synthesized by the chemical oxidation of the corresponding 3,4‐ethylenedioxythiophene (EDOT) inclusion complex with CB7 (EDOT·CB7) in water by using FeCl3 as catalyst. PEDOT·CB7‐PS is converted into the polyrotaxane (PEDOT·CB7‐PR) by end capping of the PEDOT backbones with bulky pyrene groups. The binding affinity (Ka = 1.5 × 104 m–1) confirmed sizeable binding of EDOT to CB7. FT‐IR, 1H NMR, ESI‐MS, and DFT calculations were used to characterize the synthesized compounds. PEDOT·CB7‐PR showed interesting electrochemical characteristics, which are consistent with the optical and surface‐morphological results. In particular, the material exhibited n‐ and p‐doping processes and semiconducting properties. SAXS and TEM analyses of PEDOT·CB7‐PR indicated a tendency to self‐assemble.
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