Sivakumar Irla, Swamynathan K, Ram Dinesh, Raghunathan V A, Kumar Sandeep
Soft Condensed Matter, Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Bangalore, 560080, India.
Department of Chemistry, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India.
Chem Asian J. 2022 Apr 14;17(8):e202200073. doi: 10.1002/asia.202200073. Epub 2022 Mar 16.
Rubicene, an unusual contorted polycyclic aromatic hydrocarbon, was realized to function as a novel core fragment for discotic liquid crystals. The central π-conjugated motif was prepared from dialkoxyiodobenzene via Sonagashira coupling followed by pentannulation and Scholl cyclodehydrogenation. The synthesized rubicene derivatives were found to be thermally stable and exhibit enantiotropic columnar mesophases. The columnar arrangement of these derivatives has been validated using polarising optical microscopy, differential scanning calorimetry & small-angle X-ray scattering.
红荧烯是一种不同寻常的扭曲型多环芳烃，被认为可作为盘状液晶的新型核心片段。中心π共轭基序由二烷氧基碘苯通过Sonagashira偶联反应制备，随后进行戊环化和肖尔环脱氢反应。所合成的红荧烯衍生物具有热稳定性，并呈现出向列型柱状液晶相。这些衍生物的柱状排列已通过偏光显微镜、差示扫描量热法和小角X射线散射得到验证。
