Aggregation Effects on Pigment Coatings: Pigment Red 179 as a Case Study.

ABSTRACT: Here, we have studied, with a combined experimental and computational approach, the effect of the crystal environment and aggregation on the electronic properties of Pigment Red 179, which affect both its color and optical energy gap. Spectra acquired in the near-infrared and visible range of energies suggest that this molecule is indeed a "cool" dye, which can be employed as a red pigment that provides effective color coverage to different substrates without contributing to their heating during light irradiation. Spectra acquired on different polymer mixtures at different pigment concentrations (i.e., 2.5-10 wt %) suggest that absorption features depend on chromophoric arrangements promoted by the strong intermolecular π-π interactions. Calculations, performed at the time-dependent densit

SUBMITTER: Muniz-Miranda F 

PROVIDER: S-EPMC6893955 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature