A chemosensor with a paddle structure based on a BODIPY chromophore for sequential recognition of Cu²⁺ and HSO₃.

ABSTRACT: In this study, a highly selective chemosensor ML based on a BODIPY fluorescent chromophore was synthesized for sequential recognition of Cu²⁺ and HSO₃ ^- in a CH₃OH/H₂O (99 : 1 v/v) system, which contained three recognition sites and its structure characterized by ¹H NMR, ¹³C NMR and ESI-HR-MS. The sensor ML showed an obvious "on-off" fluorescence quenching response toward Cu²⁺ and the ML-Cu²⁺ complex showed an "off-on" fluorescence enhancement response toward HSO₃ ^-. The detection limit of the sensor ML was 0.36 μM to Cu²⁺ and 1.4 μM to HSO₃ ^-. In addition, the sensor ML showed a 1 : 3 binding stoichiometry to Cu²⁺ and the reco

SUBMITTER: Li S 

PROVIDER: S-EPMC9073911 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature