Herein, we designed and synthesized a luminophor, Rh-F, which is an intergrant of rhodol and 2-hydroxy benzothiazole by introducing a benzothiazole unit onto the ortho-position of the phenolic hydroxy of rhodol. Rh-F exhibited excellent fluorescence properties such as a large Stokes shift (>180 nm) and the synergistic effect of aggregation-induced emission (AIE) and an excited state intramolecular proton transfer (ESIPT) feature. The AIE/ESIPT mechanism was thoroughly explored using X-ray single-crystal structures and photophysical determinations. Furthermore, Rh-F showed a sensitive fluorescence response to Fe²⁺ with low detection limits of 115.2 nM and high selectivity. Studies of its sensing mechanism indicated that the Fe²⁺-induced blue-green fluorescence-quenched at 525 nm originates from an irreversible Fe²⁺ chelate with the oxygen atom of the hydroxyl group and the N atom of the benzothiazole moiety. This blocked the ESIPT process of Rh-F which resulted in the quenching of the fluorescence sensor for Rh-F.

在这里，我们通过将苯并噻唑单元引入到Rhodol的酚羟基的邻位上，设计并合成了一种发光体Rh-F，Rh-F是rhodol和2-羟基苯并噻唑的结合体。Rh-F表现出出色的荧光特性，例如大的斯托克斯位移（> 180 nm）以及聚集诱导发射（AIE）和激发态分子内质子转移（ESIPT）功能的协同效应。使用X射线单晶结构和光物理测定，彻底探索了AIE / ESIPT机制。此外，Rh-F对Fe ²⁺表现出敏感的荧光响应，检测限低至115.2 nM，选择性高。对铁的感应机理的研究表明，铁²⁺诱导的在525 nm处猝灭的蓝绿色荧光源自不可逆的Fe ^{2 +}螯合物，其具有羟基的氧原子和苯并噻唑部分的N原子。此阻塞的ESIPT过程的Rh-F这导致用于荧光传感器的猝灭的Rh-F 。