Synthesis, Characterization and Near Infrared Reflectance Properties of A Novel Perylene Pigment

In this research, synthesis, characterization and near infrared reflectance property of a pigment based on perylene and p-toluidine were investigated. in this way, ftir, 1hnmr, and elemental analyses were used to identify the synthesized pigment. the chemical structure of the synthesized pigment had a good accordance with results of instrumental analyses. ftir spectrum confirmed elimination of vibrations associated with anhydride group carbonyls above 1750 cm-1. these vibrations were transferred below 1710 cm-1 after condensation reaction. the structure of the molecule was optimized using the dft method, and the amount of homo and lumo, as well as one of the parameters affecting the amount of reflection namely, the dipole moment were estimated. the molecule's dipole moment was 0.05, according to the findings. the synthesized pigment was used in a formulation based on polyurethane and it was coated on glass substrate in thicknesses of 60, 90, and 120 microns. the particles size of pigment in the prepared coating was measured using a grindometer and determined to be fewer than 10 microns. the reflectance of the coatings on the substrates was studied using a near ir reflectance spectrophotometer in the range of 870-2500 nm to evaluate the application and effect of thickness in cool coatings. the results revealed that the applied coating, which has a thickness of 120 microns, has a greater infrared reflectance. in general, as the thickness of the coating increases, the infrared reflection rises.

Synthesis, characterization and near infrared reflectance properties of a novel perylene pigment

In this research, synthesis, characterization and near infrared reflectance property of a pigment based on perylene and p-toluidine were investigated. In this way, FTIR, 1HNMR, and elemental analyses were used to identify the synthesized pigment. The chemical structure of the synthesized pigment had a good accordance with results of instrumental analyses. FTIR spectrum confirmed elimination of vibrations associated with anhydride group carbonyls above 1750 cm-1. These vibrations were transferred below 1710 cm-1 after condensation reaction. The structure of the molecule was optimized using the DFT method, and the amount of HOMO and LUMO, as well as one of the parameters affecting the amount of reflection namely, the dipole moment were estimated. The molecule's dipole moment was 0.05, according to the findings. The synthesized pigment was used in a formulation based on polyurethane and it was coated on glass substrate in thicknesses of 60, 90, and 120 microns. The particles size of pigment in the prepared coating was measured using a grindometer and determined to be fewer than 10 microns. The reflectance of the coatings on the substrates was studied using a Near IR reflectance spectrophotometer in the range of 870-2500 nm to evaluate the application and effect of thickness in cool coatings. The results revealed that the applied coating, which has a thickness of 120 microns, has a greater infrared reflectance. In general, as the thickness of the coating increases, the infrared reflection rises.