The
recognition and separation of chiral isomers are
of great importance
in both industrial and biological applications. In this study, a chiral
recognition system based on electrochemiluminescence was established
for the detection of penicillamine (PA) enantiomers. The system utilized
a homochiral [Zn2(BDC)(d-lac)] (Zn-BL) platform
for the uniform distribution of Ru(bpy)3
2+ nanoparticles,
effectively mitigating aggregation-caused quenching. The chiral recognition
ability of Zn-BL was tested to distinguish between PA enantiomers,
and the results indicated a substantial increase in the chiral electrochemiluminescence
(ECL) signal when l-PA was present, in contrast to d-PA. The mechanism underlying ECL chiral discrimination was investigated
using water contact angle measurements, DFT calculations, and electrochemical
characterization. The system exhibited high selectivity, stability,
and reproducibility for PA enantiomer detection. Furthermore, the
proposed method can accurately identify one enantiomer of PA in a
mixture. This study provides a reliable and sensitive approach for
achieving the highly selective detection of chiral molecules.