Pyrylium salts are a type of heterocyclic compound with unique chemical reactivity and photophysical properties. Because of these properties, they show great applications in the fields of biosensor and organic optoelectronic materials. 吡喃盐是一类具有独特化学反应活性和光物理性质的杂环化合物,因为在生物传感和有机光电材料等领域具有良好的应用前景而受到广泛关注。