Relaxation processes in thiophene-based random copolymers

G. Bongiovanni, M.A. Loi, A. Mura, A. Piaggi, S. Luzzati, M. Catellani

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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 languageEnglish
Pages (from-to)749 - 754
Number of pages6
JournalChemical Physics Letters
Issue number5
Publication statusPublished - 1998

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