From the journal:

Chemical Communications

Tunable thermochromism in N-annulated perylene diimide thin films

Kathryn M. Wolfe ORCID logo a  and  Gregory C. Welch ORCID logo *a  

* Corresponding authors

a Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada
E-mail: gregory.welch@ucalgary.ca

Abstract

An N-annulated perylene diimide (PDIN-H) blended with branched polyethylenimine (PEI) and green solvents is coated to afford thermochromic thin films on a robust substrate. Tunable time-temperature colour transitions are observed with dependence on PDIN-H loading. UV-Visible spectra, chromaticity diagrams, (polarized) optical microscopy, and kinetic modelling reveal dynamic acid–base chemistry.

Graphical abstract: Tunable thermochromism in N-annulated perylene diimide thin films

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Article information

DOI
https://doi.org/10.1039/D5CC06956D
Article type
Communication
Submitted
05 Dec 2025
Accepted
24 Feb 2026
First published
24 Feb 2026
This article is Open Access
Creative Commons BY-NC license

Chem. Commun., 2026, Advance Article

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Tunable thermochromism in N-annulated perylene diimide thin films

K. M. Wolfe and G. C. Welch, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D5CC06956D

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