Raman Fingerprints of ?-Electron Delocalization in Polythiophene-Based Insulated Molecular Wires

13Citations
Citations of this article
20Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

Insulated polythiophenes with a polyrotaxane-like 3D architecture have shown excellent intrawire hole mobility, allowing their use in interesting optoelectronic applications. This is due to the isolation of the ?-conjugated backbones that warrants for stabilization of the quasi-planar conformation of the polythiophene core and prevents electronic communication between adjacent chains. Thus, polythiophene-based insulated molecular wires (IMWs) constitute ideal test-beds to evaluate the structural changes within the conjugated polymer chain, such as intrachain conformation and ?-electron delocalization. Here, we investigate the structure and spectroscopic response of fully and partially insulated polythiophene-based IMWs. An experimental investigation of Raman spectra supported by density functional theory (DFT) calculations allows us to give a detailed interpretation of intramolecular interactions, highlighting differences in ?-electron conjugation revealed by the presence of an intensity transfer between the two main Raman modes associated with the C?C/C-C stretching vibrations. This study proves the sensitivity of Raman spectroscopy as a technique to monitor structural changes in self-encapsulated conjugated polymers.

Cite

CITATION STYLE

APA

Mosca, S., Milani, A., Castiglioni, C., Hernández Jolín, V., Meseguer, C., López Navarrete, J. T., … Ruiz Delgado, M. C. (2022). Raman Fingerprints of ?-Electron Delocalization in Polythiophene-Based Insulated Molecular Wires. Macromolecules, 55(9), 3458–3468. https://doi.org/10.1021/acs.macromol.1c02458

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free