Study Of Zinc Tetraphenylporphyrin Nano-Materials Prepared By Organic Vapor Phase Deposition And Optical Properties

Porphyrin molecular material is a kind of cyclic conjugated compound, which is formed by four pyrrole molecules linked by methylene, and one of the important materials in the field of organic optoelectronics. In recent years porphyrin nanomateria have been studied extensively, which has excellent optical activity and high chemical stability. Therefore, it is important significance and scientific value that exploring with controllable morphologies and properties of porphyrin nanometer material.The research work of this thesis is the preparation of tetraphenylporphyrinzinc (ZnTPP) nanomaterials by using organic vapor deposition method (OPVD), by changing the experimental parameters to control the morphology of ZnTPP nano materials. Specific experimental parameters are:heat source temperature, temperature gradient, chamber pressure, gas flow rate and substrate materials, etc., the realization of the self-assembly of four phenylporphyrin zinc molecules on the nanometer scale which through the method of innovation to alter the molecular packing method. After many experiments, obtaining the large, fast, simple ZnTPP nanomaterials under the condition of atmospheric pressure environment.Different heat source temperature, temperature gradient, chamber pressure, gas flow rate will influence ZnTPP nanomaterials characterization and optical properties. From the scanning electron microscope (SEM), the morphology characteristics of long strip, tetrahedral and spherical shape can be observed, the morphology and structure of nano materials prepared by self-assembly at room temperature and atmospheric pressure are small spheres with average diameter is 80 nm; The type of growth substrate material deposition does not affect the morphology of nanomaterials; Ultraviolet-visible absorption spectra (UV-Visible) of the Soret band and Q band absorption peak in the fission, and with the increase of the temperature of the heating source the absorption intensity increased, and peak broadening and the red shift phenomenon, in Soret (B) of absorption peak with redshift significantly; Fourier infrared spectroscopy (FTIR) showed that the raw material monomer and nanomaterials of the peaks are approximately coincident, the experimental preparation of the organic vapor deposition method does not change the structure of ZnTPP group, determine theprepared nanostructures by organic vapor deposition also the same as ZnTPP molecules with excellent thermal stability; In X ray diffraction (XRD) spectra, shape of nanometer materials is almost the same at low temperature, But compared with the source material, the peak number of nano materials is greatly reduced, and show the different accumulation mode with the source material.