Dibenzo[a,c]phenazine with six-long alkoxy chains to probe optimization of mesogenic behavior
作者:Chi Wi Ong、Ja-Yi Hwang、Mei-Chun Tzeng、Su-Chih Liao、Hsiu-Fu Hsu、Tsu-Hsin Chang
DOI:10.1039/b617827h
日期:——
New hexaalkoxydibenzo[a,c]phenazines (HDBPs) with six-carbon long chains have been prepared, and their mesogenic behavior investigated. The incorporation of six peripheral alkoxy groups onto the larger, dipolar core bearing nitrogen atoms showed interesting thermal properties. The crystal-to-mesophase transitions for the HDBPs (K–col) are similar to the triphenylenes, but the clearing temperatures (Col–I) are shifted upwards by approx. 60 °C. HDBP therefore possesses stable hexagonal mesophases in a fairly broad temperature range and form homeotropically aligned films.
新合成的具有六碳长链的新型六烷氧基二苯并[a,c]吩嗪类化合物(HDBP),其液晶行为已被研究。通过将六个外围烷氧基团引入到具有氮原子的大偶极核心结构中,展现出有趣的温度特性。HDBP的晶体至液晶相转变(K–col)与三苯化合物相似,但其清亮点(Col–I)温度提高了约60°C。因此,HDBP具有在相当宽的温度范围内稳定的六方液晶相,并能形成垂直排列的薄膜。