Truncated conjugation in fused heterocycle-based conducting polymers: when greater planarity does not enhance conjugation.

ABSTRACT: One of the main assumptions in the design of new conjugated polymer materials for their use in organic electronics is that higher coplanarity leads to greater conjugation along the polymer backbone. Conventionally, a more planar monomer structure induces a larger backbone coplanarity, thus leading to a greater overlap of the carbon π-orbitals and therefore a higher degree of π-electron delocalisation. However, here we present a case that counters the validity of this assumption. Different diselenophene-based polymers were studied where one polymer possesses two selenophene rings fused together to create a more rigid, planar structure. The effects of this greater polymer coplanarity were examined using Raman spectroscopy and theoretical calculations. Raman spectra showed a large difference

SUBMITTER: Marin-Beloqui JM 

PROVIDER: S-EPMC9890783 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature