A new experiment of the photoluminescence spectrum of organic molecules was introduced to undergraduate teaching. The emission behaviors of different aggregation with perylene and 1, 1, 2, 3, 4, 5-hexaphenylsilole (HPS) as typical luminophores were measured so as to observe the different phenomena of aggregation-caused quenching (ACQ) and aggregation-induced emission (AIE). The crystal structures characteristics of the above molecules could be obtained by the use of the Cambridge Crystallographic Data Centre (CCDC). The causes of the phenomena of AIE and ACQ were analyzed from the aspects of structures of molecular crystals. Therefore, the intrinsic relations between photoluminescence mechanism and molecular states were discussed on this basis. In this paper, the design, contents and conclusions of the photoluminescence experiment were elaborated in detail. Combining with the teaching process, the teaching effects were discussed for broadening the undergraduates' horizons as well as improving their cognitive abilities and scientific research qualities.

Keywords： AIE ; ACQ ; Photoluminescence spectrum experiment ; Teaching effect