Fig. 5 | Communications Chemistry

Fig. 5

From: Harmonic light scattering study reveals structured clusters upon the supramolecular aggregation of regioregular poly(3-alkylthiophene)

Fig. 5

Schematic representation of the supramolecular aggregation process of P3ATs from single chain to helical aggregate. Initially, P3AT chains are disolved in chloroform (good solvent). Upon addition of methanol (non-solvent for P3AT) chains assemble into structured micro-environments/clusters. Chloroform molecules between the single chains prevent the chains from planarizing. For a certain amount of methanol added, chloroform is expelled from the cluster causing the polymer backbone to planarize. The ordered structure present in the clusters is preserved during aggregation. The conformational change of the polymer backbone results in a red-shift and a bisignate CD response for these particular P3ATs. (In this representation, only the formation of clusters and aggregates is presented. Smaller species in equilbrium are omitted for clarity.)

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