Photoluminescence of Liquid Crystal with Organic Thin Film of (2-(Naphtha[3,4]imidazol-2-yl) Quinoline)

Abstract

A complex sample structure including nematic liquid crystals (NLC) with organic thin film (2-(naphtha[3,4]imidazol-2-yl) quinoline) (NIQ) is applicative to the photoluminescence (PL) study in this report. The pumping beams of 325 nm and 390 nm are used to excite the complex sample structure and the NIQ thin film. The excitation polarization about directorial orientation can cause the changing of absorption intensities in PL spectrum. Peak intensities can thus be modulated when the polarization of pumping beam adjusted. Consequently, the peak shifting in the PL spectrum of complex sample structure is revealed the energy transformation between NLC and NIQ.

Keywords:

• Luminescence
• nematic liquid crystals
• polarization