Effective conjugation in conjugated polymers with strongly twisted backbones: a case study on fluorinated MEHPPV

Abstract

Conjugated polymers with strongly twisted backbones, such as MEHPPV with fluorinated vinylene units(F-MEHPPV), demand a redefinition of the all-important 'effective conjugation length' ECL, which weextract here by a facile graphical method. In MEHPPV (being essentially planar), the ECL coincideswith the 'maximum conducive chain length' MCC and extends over about n E 9 repetition units (RU). InF-MEHPPV, the MCC is similarly long with n E 8, but the ECL localizes on just one RU. The strong twistin F-MEHPPV persists in the excited state, broadening the emission spectrum and quenching thefluorescence with reduced radiative and enhanced non-radiative rates


Autore Pugliese

Tutti gli autori

  • R. Milad; J. Shi; A. Aguirre; A. Cardone; B. Medina; G.M. Farinola; M. Abderrabba; J. Gierschner

Titolo volume/Rivista

JOURNAL OF MATERIALS CHEMISTRY C


Anno di pubblicazione

2016

ISSN

2050-7526

ISBN

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Nessuna citazione

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Settori ERC

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Codici ASJC

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