Blue Light Emission from a Rod-Like Liquid Crystal

Abstract:

A rod-like liquid crystal 4-butoxybenzylidene-4'-octylphenylamine was synthesized. The molecular structure and the liquid crystalline phases of the synthesized compound were characterized with the nuclear magnetic resonance spectroscopy, the differential scanning calorimetry, and the polarizing optical microscopy, respectively. The absorption measurement shows that the dilute tetrahydrofuran solutions of the rod-like liquid crystal absorb photons at about 290 and 330 nm, respectively; while the luminescence measurements indicate that this rod-like liquid crystal can give off intense blue photoluminescence with its dominant peak located at about 430 nm. Using Hückel tight-binding program, we have calculated the electronic structures of the liquid crystal, and the origin of the blue photoluminescence is discussed. Introduction

• Periodical: Key Engineering Materials (Volumes 428-429)
• Pages: 288-291
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.428-429.288
• Online since: January 2010
• Authors: Bao Gai Zhai, Yuan Ming Huang
• Keywords: Absorbance, Electronic Structure, Photoluminescence (PL), Rod-Shaped Liquid Crystal

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