A liquid-crystalline perylene tetracarboxylic bisimide derivative bearing trisiloxan-2-yl moieties: influence on mesomorphic properties and electron transport. Issue 22 (15th February 2016)

• Record Type: Journal Article
• Authors: Funahashi, Masahiro; Takeuchi, Nozomi; Sonoda, Akinari
• Is Part Of: RSC advances. Volume 6:Issue 22(2016)
• Page Start: 18703
• Page End: 18710
• Publication Date: 2016-02-15
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra23119a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Mesomorphic and electron transport properties are compared for liquid-crystalline perylene tetracarboxylic bisimide derivatives bearing linear disiloxane and trisiloxane chains, as well as trisiloxan-2-yl groups. Abstract : Mesomorphic and electron transport properties are compared for liquid-crystalline (LC) perylene tetracarboxylic bisimide (PTCBI) derivatives bearing linear disiloxane and trisiloxane chains, as well as bis(trimethylsiloxanyl)methylsilyl(trisiloxan-2-yl) groups. In contrast to alkyl-substituted analogues, the PTCBI derivative bearing bulky trisiloxan-2-yl moieties exhibits a more ordered columnar phase and higher electron mobility compared to that bearing linear trisiloxane chains. In spite of the bulkiness, the trisiloxan-2-yl moieties do not inhibit closed π–π stacking within the columnar aggregates. Therefore the electron mobility in the ordered columnar phase of the compound bearing the branched trisiloxan-2-yl moieties was 0.05 cm 2 V −1 s −1 at room temperature and it exceeded 0.1 cm 2 V −1 s −1 at 120 °C.