Uncovering Backbone Conformation for Rigid DPP-Based Donor-Acceptor Conjugated Polymer Using Deuterium Labeling and Neutron Scattering.

ABSTRACT: The conjugated polymer's backbone conformation dictates the delocalization of electrons, ultimately affecting its optoelectronic properties. Most conjugated polymers can be viewed as semirigid rods with their backbone embedded among long alkyl side chains. Thus, it is challenging to experimentally quantify the conformation of a conjugated backbone. Here, we performed contrast variation neutron scattering on rigid conjugated donor-acceptor (D-A) diketopyrrolopyrrole (DPP) polymers with selectively deuterated side chains to measure the conjugated backbone conformation. We first synthesized DPP-based polymers with deuterated side chains, confirmed by NMR and FTIR. Using contrast variation neutron scattering, we found that the DPP-based conjugated polymers are much more rigid than poly(3-alkyl

SUBMITTER: Cao Z 

PROVIDER: S-EPMC11562799 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature