Terahertz analysis of quinacridone pigments

Authors

Andrew Squires, University of WollongongFollow
Madeleine T. Kelly, University of WollongongFollow
R A. Lewis, University of WollongongFollow

RIS ID

110807

Publication Details

Squires, A. D., Kelly, M. & Lewis, R. A. (2017). Terahertz analysis of quinacridone pigments. Journal of Infrared, Millimeter and Terahertz Waves, 38 (3), 314-324.

Abstract

We present terahertz spectroscopy and analysis of two commercially available quinacridone pigments in the 0.5-4.5 THz range. Our results show a clear distinction between quinacridone red and magenta pigments. We reveal four definite absorptions in the terahertz regime common to both pigments, but offset between the pigments by ∼ 0.2 THz. The lowest-energy line in each pigment is observed to increase in frequency by ∼ 0.1 THz as the temperature is reduced from 300 to 12 K.