Efficient intrachain charge transport ensures that charge carriers are rapidly transported to PF5 sites, despite the fact that there are few of them relative to PFO monomers in each chain.
While the quintessential quadruple hydrogen-bonding UPy unit was present in a protected form, no inter- or intrachain hydrogen bonding occurred and the polymer adopted a random coil conformation.
The scheme representing these interactions is shown in Figure 41. The presence of interchain and intrachain (including intra-unit) hydrogen bonds depends on the steric factor - dislocation of ...