Macromolecular Chemistry and Physics, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Abstract Fluorescent supramolecular materials have attracted a lot of attention over the past few decades. However, those can respond to multiple stimuli are not often reported, especially for nonconventional fluorescent materials. Here, material is reported that temperature/electrical heating, humidity, volatile acids/organic amines, and mechanical strain. This prepared by physical mixing oligomeric polyethyleneimine (o‐PEI) polyacrylic acid (o‐PAA). Although they almost non‐fluorescent, their combination produces bright fluorescence, emission bands shift longer wavelengths as amount o‐PAA increases. Calculations based on Density Functional Theory (DFT) show there strong noncovalent interactions between o‐PEI o‐PAA, resulting in through‐space conjugation cluster‐triggered emission. By studying relationship intensity, temperature, molecular motion, dependence intensity relaxation time established, which will provide insight into luminescence origin In addition, this shows good self‐healing ability. The luminescence, responsiveness self‐reparability all related but reversible bonds link o‐PAA. work only highlights value polymers, also enriches research

Language: Английский