N-annulated perylene diimide (PDIN-H) blended with branched polyethylenimine (PEI) and green-solvents are coated to afford thermochromic thin films on a robust substrate. Tunable timetemperature colour transitions are observed. UV-Visible spectra and chromaticity diagrams reveal dynamic acid-base chemistry with dependence on aggregation.
K. Wolfe and G. C. Welch, Chem. Commun., 2026, Accepted Manuscript , DOI: 10.1039/D5CC06956D
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