A Water Soluble Naphthalimide-Based Chemosensor for Fluorescent Detection CN- in Pure Water and Its Application in Practical Samples

AUTOR(ES)

Wang, Li, Li, Wen-Ting, Qu, Wen-Juan, Fan, Yan-Qing, Yao, Hong, Lin, Qi, Wei, Tai-Bao, Zhang, You-Ming

FONTE

J. Braz. Chem. Soc.

DATA DE PUBLICAÇÃO

2018-07

RESUMO

By rationally introducing aromatic carboxyl functionalized 1,8-naphthalimide, a water soluble fluorescent chemosensor (DA) was successfully synthesized. It could selectively and sensitively detect CN- in pure water via an intramolecular charge transfer to twisted intramolecular charge transfer (ICT-TICT) state change mechanism. The detection limit of the chemosensor DA to CN- was 1.38 × 10−8mol L-1 which was lower than 1.9 µmol L-1 (set by the World Health Organization (WHO)). Notably, DA displayed rapid response (about 1 s) for recognizing CN- in pure water. Furthermore, DA could be applied to monitoring CN- in tap water. Meanwhile, we prepared the test strips based on DA, which could rapidly and efficiently detect CN- in water.

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