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  • Title: A chemosensor with a paddle structure based on a BODIPY chromophore for sequential recognition of Cu2+ and HSO3.
    Author: Li S, Cao D, Hu Z, Li Z, Meng X, Han X, Ma W.
    Journal: RSC Adv; 2019 Oct 23; 9(59):34652-34657. PubMed ID: 35530010.
    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 recovery rate of ML-Cu2+ complex identifying HSO3 - could be over 70%. Sensor ML showed remarkable detection ability in a pH range of 4-8.
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