Rational design of fluorescent probe for Hg²⁺ by changing the chemical bond type.

ABSTRACT: Two kinds of fluorescent probes DFBT and DFABT, and their corresponding water-soluble compounds WDFBT and WDFABT, based on the trimers containing a benzo[2,1,3]thiadiazole moiety and two fluorene moieties are synthesized. Their luminescent behavior towards Hg²⁺ ions and other various metal ions in organic and water solutions are studied in detail via absorption and emission spectroscopy. All these probes show a selective "on-off-type" fluorescent response to Hg²⁺ ions in solution over other metal ions with a maximum detection limit of 10^-7 M. Importantly, the probe type can be changed from irreversible to reversible by altering the bridge mode between the functional units from C[triple bond, length as m-dash]C triple bond to C-C single bond. Their de

SUBMITTER: Cui T 

PROVIDER: S-EPMC9079269 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature