Recent Advances in Lithium Ion Sensing Using Fluorescent Probes With Different Structures

Abstract Lithium‐ion (Li⁺) plays a key role in new energy technologies and medical applications and therefore requires advanced detection methods for real‐time monitoring and rapid quantification. Conventional techniques such as atomic absorption spectrometry (AAS) have limitations in terms of portability, cost, and complex sample pretreatment, hindering their use in field and real‐time scenarios. In contrast, fluorescent probes are an excellent solution due to their superior selectivity, sensitivity, and ease of handling. This review highlights recent advances, which can be divided into seven parts: (i) fluorescent probes containing nitrogen‐crown ether groups; (ii) fluorescent probes containing benzo‐crown ether groups; (iii) fluorescent probes containing spiropyran groups; (iv) fluorescent probes containing naphthalene derivatives; (v) fluorescent probes containing anthracene groups; and(vi) fluorescent probes containing hydroxyl groups. This review provides an in‐depth analysis of the structure–property relationships of these probes, emphasizing how the electron donor atoms (O/N) in the acceptor modulate the optical response. Notably, the review outlines future directions, highlighting the transformative potential of fluorescent probes for biomedical diagnostics, battery performance optimization, and environmental monitoring.