Molecular Crystals and Liquid Crystals

Organic semiconductors with helical structure based on oligothiophene derivatives exhibiting chiral nematic phase

M Funahashi, N Tamaoki

Index: Funahashi, Masahiro; Tamaoki, Nobuyuki Molecular Crystals and Liquid Crystals, 2007 , vol. 475, # 1 p. 123 - 135

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Citation Number: 10

Abstract

We have synthesized 2-[5-(4-[(S)-2-methylbutoxy] phenyl)-3-methyl]-2 ″′-propyl-2: 5′- 2′: 5 ″-2 ″: 5 ″′-quaterthiophene (10), a liquid crystalline semiconductor that exhibits a chiral nematic phase, and used the time-of-flight technique to determine its carrier mobility behavior. In the chiral nematic phase, the positive carrier mobility was 2× 10− 4 cm2/Vs at 120° C and the negative carrier mobility was 1× 10− 4 cm2/Vs, both of which we attribute ...