What question did this study set out to answer?

The research aims to explore the tunable thermochromic properties of N-annulated perylene diimide blended with polyethylenimine.

February 26, 2026Chemical Communications1 citationsOpen Access

Tunable thermochromism in N-annulated perylene diimide thin films

KWKathryn M WolfeUniversity of Calgary GWGregory C. WelchUniversity of Calgary

Key Points

The research aims to explore the tunable thermochromic properties of N-annulated perylene diimide blended with polyethylenimine.
Coated N-annulated perylene diimide with branched polyethylenimine on a substrate
Utilized green solvents in film preparation
Conducted UV-Visible spectroscopy to analyze color transitions
Observed time-temperature dependent color transitions in the films
Confirmed the effectiveness of the blend in altering thermal response of the material
Demonstrated potential applications in smart materials and sensors

Abstract

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...

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