Chiral fluorescent sensor Tb3+@Cd-CP based on camphoric acid for the enantioselective recognition of R-and S-propylene glycol
Herein,a layered chiral coordination polymer,[Cd2(D-cam)2(2,2'-bipy)2]n(Cd-CP),was synthesized using a solvothermal method with camphoric acid(D-H2cam),2,2'-bipyridine(2,2'-bipy)and Cd2+,and Tb3+@Cd-CP was in-situ synthesized introducing Tb3+ions.The fluorescence experiments revealed that compared to Cd-CP,Tb3+@Cd-CP exhibited ultra-high fluorescence performance.The luminescence sensing performance demonstrated that Tb3+@Cd-CP could distinguish R/S-propylene glycol(R/S-PG)by fluorescence responses,with fluorescence quenching constant of 5.3×103 and 2.0×103 L·mol-1 respectively and the enantioselectivity factor(α)of 2.65.More-over,Tb3+@Cd-CP demonstrated limits of detection of 9.3 and 19.0 μmol·L-1 for R-PG and S-PG,respectively,and showed good reproducibility.
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