Abstract
The relaxation dynamics of soluble polyalkylthiophenes obtained by the random copolymerisation of 3,4-dibutylthiophene and 3-butylthiophene monomers is investigated. In these systems, the effective conjugation length, the optical gap and the non-radiative decay rate are controlled by varying the content of disubstituted monomers, the steric hindrance of which induces a twisting angle between thiophene rings. Several indications are reported in favour of spectral diffusion of the photoexcitations. Migration processes mainly occur within a few tens of picoseconds.
| Original language | English |
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| Pages (from-to) | 749 - 754 |
| Number of pages | 6 |
| Journal | Chemical Physics Letters |
| Volume | 288 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1998 |