Squaraine-hydrazine adducts for fast and colorimetric detection of aldehydes in aqueous media
Squaraine-hydrazine adducts for fast and colorimetric detection of aldehydes in aqueous media
复制标题
DOI：
10.1016/j.snb.2019.04.138
复制
发表时间：
2019-08
期刊：
影响因子：
--
通讯作者：
Taihong Liu;Lvjie Yang;Jing Zhang;Ke Liu;Liping Ding;Haonan Peng;K. Belfield;Yu Fang
中科院分区：
文献类型：
--
作者：
Taihong Liu;Lvjie Yang;Jing Zhang;Ke Liu;Liping Ding;Haonan Peng;K. Belfield;Yu Fang
利用肼对中心环丁烯基核心的亲核加成以及醛对肼基团的亲和力，合成了两种水溶性方酸菁染料（SQOH和SQPY）作为醛的敏感比色和荧光化学传感器。这些传感器经历的从蓝色到无色再回到蓝色的颜色变化很容易观察到，甚至用肉眼也能观察到。响应速度快（小于1秒），以甲醛为例，检测限约为60μM。与之前对方酸菁和其他胺参考物进行的亲核攻击相比，这项工作根据肼的特性经历了一个完整的ON-OFF-ON传感循环。同时，还证明了两种方酸菁与其不同结构相关的不同光物理性质。重要的是，提出了一种可能的传感机制，表明这些类型的染料在快速、灵敏和方便的醛检测领域具有巨大的潜力。
Capitalizing on the nucleophilic addition of hydrazine toward the central cyclobutenyl core and affinity of aldehydes to hydrazine group, two water-soluble squaraine dyes (SQOH and SQPY) were synthesized as sensitive colorimetric and fluorescent chemosensors for aldehydes. The color change from blue to colorless and back to blue these sensors underwent was readily observed, even by the naked eyes. The response was fast (less than 1 s) and the detection limit for formaldehyde as an example was about 60 μM. In contrast to the previous nucleophilic attack to squaraines and the other amine references studied, this work underwent a whole ON-OFF-ON sensing circle based on the characteristics of hydrazine. Meanwhile, the different photophysical properties of the two squaraines related to their different structures were also demonstrated. Importantly, a possible sensing mechanism is proposed suggesting these types of dyes hold great potential in the area of rapid, sensitive, and convenient detection of aldehydes.