Synthetic procyanidins-metallic compounds study the infrared spectral properties and ultraviolet spectral properties of mates, to study the free radical scavenging ability of procyanidins and the antioxidant ability of procyanidins complexes under different pH buffer solutions, provide a certain theoretical basis for future research and application of procyanidins. In addition to antibacterial, anti-radiation, anti-allergy and other functions, proanthocyanidins can also inhibit tumor. However, few people have studied the coordination reaction of procyanidins with Bovine serum albumin and metal ions, so it has great research value. In this paper, the optical activity of the complex will be preliminarily studied, which will lay a theoretical foundation for the development of drug fluorescence probe in the future.

A CdTe quantum dot modified with thioglycolic acid as stabilizer was prepared. The structure of CdTe quantum dots was characterized by IR, UV and fluorescence spectra, transmission electron microscopy (TEM) scanning and X-ray diffraction (XRD). The effects of reactants, temperature, time and PH on the luminescence properties of the quantum dots were investigated. It is found that the quantum dots have strong fluorescence intensity. The synthesized QDS have small and uniform particle size and high crystallinity. The optimum conditions were determined as follows: n (Cd2+): n (Te2-): n (TGA) = 2:1:4, heating temperature 140°C, reaction time 60min, pH 11.