Macrocycles, pseudorotaxanes and catenanes containing a pyrrolo-tetrathiafulvalene unit: absorption spectra, luminescence properties and redox behavior
2001
The photophysical properties of (i) three macrocycles (1–3) of different size, each one incorporating a bis(2,5-dimethylpyrrolo[3,4-d])tetrathiafulvalene (TTFP) and a 1,4-dimethoxybenzene (DMB) electron-donating unit,
(ii) the six pseudorotaxanes obtained by threading 1–3 with the electron acceptors dimethyldiazapyrenium (DMDAP2+)
and dibenzyldiazapyrenium (DBDAP2+) and (iii) the three catenanes obtained by interlocking 1–3 with the electron-accepting cyclophane cyclobis(paraquat-p-phenylene) (CBPQT4+) have been investigated. The monooxidized and dioxidized species obtained by oxidation with Fe(III) of the TTFP unit contained in the above compounds have
also been studied. The redox-driven dethreading/rethreading process has been investigated in the case of the pseudorotaxane
based on the macrocycle 2 and the DMDAP2+ dication. In the catenanes, oxidation of the TTFP unit causes strong spectral changes, but does not promote disruption of the interlocked structures.
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