@inproceedings{aa1d8d85871a4853ad149c5854562a54,
title = "Rational structural engineering of photochromism and photoluminescence in bipyridinium-based bifunctional systems",
abstract = "Bipyridinium-based systems integrating photochromism and photoluminescence hold promise for smart materials but face challenges in radical stability and emission controllability. Here, we report a π-stacking-engineered conjugated polypyridinium ligand (PTP) that achieves durable photochromism and tunable dual photoluminescence. Single-crystal analysis reveals infinite π-π stacking and hydrogen-bonded networks, stabilizing photogenerated radicals. Upon 365 nm irradiation, rapid photocoloration arises from persistent pyridinium radicals, while excitation-dependent emission enables chromaticity shifts from blue to yellow, including white-light emission at 420 nm excitation. Progressive luminescence quenching may occurs under 365 nm light irradiation due to energy transfer to photogenerated radicals. This work demonstrates a supramolecular strategy to synchronize long-lived photochromism with dynamic luminescence modulation, advancing the rational design of multifunctional optical materials.",
keywords = "Bipyridinium derivatives, Excitation-dependent emission, Photochromism, Photoluminescence, Radical lifetime",
author = "Yu, \{Shi Kai\} and Jie Zhang",
note = "Publisher Copyright: {\textcopyright} 2025 SPIE.; International Conference on Optoelectronic Information and Functional Materials, OIFM 2025 ; Conference date: 18-04-2025 Through 20-04-2025",
year = "2025",
month = aug,
day = "19",
doi = "10.1117/12.3073050",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Shahid Hussain and Jupeng Ding",
booktitle = "International Conference on Optoelectronic Information and Functional Materials, OIFM 2025",
address = "United States",
}