Thermoreversible helical fibers from photoreactive triphenylene-derived liquid crystals in liquid paraffin

被引：0

作者：

Hirose, Takuji ^{[1
]}

Kikuchi, Yuka ^{[1
]}

Nakano, Tomoaki ^{[1
]}

Ohno, Tsukasa ^{[1
]}

Kawamura, Kengo ^{[1
]}

Nazri, Normazliana Binti ^{[2
]}

Fujimori, Atsuhiro ^{[1
]}

Kodama, Koichi ^{[1
]}

Yasutake, Mikio ^{[1
]}

机构：

[1] Saitama Univ, Grad Sch Sci & Engn, 255 Shimo Ohkubo, Sakura, Saitama 3388570, Japan

[2] Saitama Univ, Dept Appl Chem, 255 Shimo Ohkubo, Sakura, Saitama 3388570, Japan

来源：

HELIYON | 2023年 / 9卷 / 11期

关键词：

Triphenylene-derived liquid crystal; Photocyclization reaction; Helical fiber; Assembly; Thermal reversibility; POLYMER-FILMS; PHOTOPOLYMERIZATION; ORGANIZATION;

D O I：

10.1016/j.heliyon.2023.e22037

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Liquid crystalline triphenylene derivatives, TPC1p-n (n = 6, 12, 14, 16) were prepared using p- alkoxycinnamate as the [2+2] photo-cyclization site. TPC1p-n (n = 12, 14, 16) showed Colr phase and gave crescent-shaped or helical fibers after UV-irradiated in liquid paraffin solutions at 90 and 110 degrees C in the Colr temperature range. The apparent photoreaction products were shown to be thermally reversible, i.e. they dissolved in liquid paraffin at high temperatures and reappeared on cooling, indicating that they were aggregates of oligomerized TPC1p-n. The reaction mechanism was discussed in terms of the structure of the liquid crystalline phase.

引用

页数：7

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