Intrinsic doping and electrostatic complexation of sulfonated poly(3,4-ethylenedioxythiophenes) (PEDOTs)

Self-doped conjugated polymers represent a compelling strategy for achieving efficient electrostatically complexed ionic networks without the need for external dopants. In this work, we present a previously unreported class of sulfonated poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives that exhibit intrinsic self-doping and readily form stable complexes with insulating polyelectrolytes. Notably, we show that even minor variations in the side chain structure, such as a one-carbon difference, have a profound effect on the polymers’ electrical conductivity, structural order, and self-doping level. Using detailed spectroscopic and electrochemical analyses, we reveal how these materials intrinsically stabilize charge carriers and maintain their conductive behavior after complexation. Our findings demonstrate that the self-doped sites act as quasi-permanent ionic–electronic dipoles, creating a robust and adjustable platform for next-generation soft electronic materials. This data includes..., , # Data from: Intrinsic doping and electrostatic complexation of sulfonated poly(3,4-ethylenedioxythiophenes) (PEDOTs)

Dataset DOI: [10.5061/dryad.9ghx3ffwh](10.5061/dryad.9ghx3ffwh)

## Description of the data and file structure

This dataset contains the raw (or preliminarily processed) data of experimental results collected to publish manuscript: \"Intrinsic Doping and Electrostatic Complexation of Sulfonated Poly(3,4-ethylenedioxythiophenes) (PEDOTs)\", authored by Hyunki Yeo, Anush Singhal, Alexandra Zele, Rachel A. Segalman, and Michael L. Chabinyc. 

**Experimental Methods**

*pH measurements and UV-vis spectroscopy of solutions upon titration.* 1 mM aqueous solution of PEDOT-SS-Na was prepared. Titration among adding HCl solution was demonstrated with a Mettler Toledo InLab probe connected to a ThermoFisher pH meter, while the concentration and output pH were logged. On every integer pH, the solution was carried out for Uv-vis measurements using an Agilent Cary 60 UV-vis spectroph...,