Preparation Of Near Infrared Absorbents And The Research Of The Spectral Characteristics

The domestic and international state of development of near-infrared absorbents is introduced in this thesis. The species of near-infrared absorbents, the factors to the change of maximal wavelength (λ_max ) in near-infrared absorbent and the perspective of the application of near-infrared absorbent have been also simply introduced.In this thesis, the compounds of phthalocyanine and amine salt are selected as subjects investigated, fifteen kinds of metal phthalocyanine compounds with different metal ligand, different substituted alkoxy, and three kinds of different alkyl substituted amine salt compounds were synthesized, respectively. The molecular structures of the compounds were identified by elements analysis, infrared spectra and nuclear magnetic resonance hydrogen spectra. At the same time, the UV-VIS spectra of the eighteen compounds in the MMA were tested and compared, their absorbing peaks were compared too, which established the fundament of the research of near-infrared absorbents in next step.