Photochemical events during the photosensitization of Hypocrellin A on ZnS Quantum dots

摘要

Hypocrellin A is organic dyes with more superior visible light performance,which has resistant tumor activity and becomes widely accepted.In this paper,acetone is used as solvent to extract,separate and purify the hypocrellin A.With ZnCl2 and Na2S as raw material,ZnS Quantum dots (QDs) were prepared by water-phase synthesis method under the role of the magnetic stirrer.Fluorescence detection results showed that the optimum pH of the ZnS QDs and HA solution close to neutral (6.86).The fluorescence quenching of hypocrellin A is most obvious as the ZnS QDs was added,because of the strong interaction was generated between HA and ZnS QDs,resulting in the fluorescence quenching.