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In this work, a spherical calixpyridinium–IR‐820 supramolecular assembled material was fabricated based on the calixpyridinium‐ induced IR‐820 aggregation. This assembled material exhibited a well visible light responsiveness by the photodecomposition of aggregated IR‐820 accompanied by an obvious color change. Such photochromic material has many potential applications. More interestingly, the photodecomposition of aggregated IR‐820 was significantly promoted, although the aggregated photosensitizers usually exhibited a lower photoreactivity. This approach can be further extended to construct various visible‐light responsive supramolecular assembled materials and potentially applied in many fields. Herein, benefitting from the pH‐dependent luminescent properties of calixpyridinium and the photodegradation products of IR‐820, a pH‐controlled visual multicolor luminescence was achieved, which was perfectly applied in the detection of pH from 5 to 10 by naked eyes.
Chinese Journal of Chemistry – Wiley
Published: May 1, 2022
Keywords: Macrocycles; Luminescence; Supramolecular chemistry; Calixpyridinium; Light responsiveness
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