Automated Evaluation Method for Aggregation-Induced Circularly Polarized Luminescence of Platinum(II) Complexes With 1,1′-Bi-2-naphthol Derivatives as Ligands

Abstract

Luminogens exhibiting aggregation-induced circularly polarized luminescence (AICPL) properties have garnered significant attention in recent years due to their promising applications in optoelectronics and biomedical research. Typically, aggregation-induced emission (AIE) is evaluated by measuring luminescence spectra using a spectrofluorometer while varying the volume ratio of a poor to a good solvent, whereas circularly polarized luminescence (CPL) is assessed separately using a CPL spectrometer. However, these conventional methods rely on manual operation, which may lead to operational errors, particularly when processing a large number of samples. Furthermore, cases often occur where AIE is observed while CPL is not, suggesting that simultaneous measurement of both phenomena will enhance the efficiency of AICPL characterization. In this study, we demonstrate the applicability of an automated high-throughput CPL system capable of simultaneously obtaining CPL and luminescence spectra of multiple samples for the purpose of AICPL evaluation. We assess the measurement reproducibility of the system, compare the AICPL properties of enantiomers, and investigate the influence of various substituents on chiral platinum(II) complexes. The results obtained collectively demonstrate that this method offers an efficient and reliable approach to the comprehensive evaluation of AICPL properties.