ArticleMacromolecules2026
Time-Dependent Structure Assessment of Conjugated Polymer Aggregates in Solution by Single-Molecule Fluorescence Spectroscopy.
Article in Macromolecules, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Monitoring and understanding the aggregation kinetics of n-type polymers provide strategies to favorably control aggregation and thereby optimize conjugated polymers ink shelf life, printability, and thin-film properties. Here, the in situ characterization of n-type copolymer aggregates employing ensemble absorbance and fluorescence spectroscopy for spectral characterization, in combination with single-molecule fluorescence spectroscopy methods to identify subcategories of aggregates, is reported. Specifically, we utilize a diffusion-based single-molecule burst method that resolves individual aggregates as they traverse the observation volume, allowing us to determine the aggregate size, concentration, and chain conformation through the statistical analysis of single-aggregate fluorescence data. Base-stable P-(EO-NDIT2) with branched ether-based side chains self-assembles from molecularly dissolved chains into nano- to micrometer-sized aggregates over the course of weeks to months, depending on the solvent used. Through spectral decomposition and polarization-sensitive single-molecule fluorescence spectroscopy, the aggregates were categorized by their size into small (
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