Photoresponsive liquid crystals (LCs) whose alignment can be controlled with UV-Visible light are appealing for a range of photonic applications. From the perspective of exploring the interplay between the light response and the self-assembly of the molecular components, supramolecular liquid crystals are of particular interest. They allow elaborating the structure-property relationships that govern the optical performance of LC materials by subtle variation of the chemical structures of the building blocks. Herein we present a supramolecular system comprising azophenols and stilbazoles as hydrogen-bond donors and acceptors, respectively, and show that ortho-fluorination of the azophenol dramatically increases the thermal stability of the LC phases, an important characteristics in their further utilization in photonics. The systems exhibit fast photoinduced order-disorder transitions, and rapid recovery of the liquid-crystalline state once the light irradiation is ceased, due to the photochemical properties of azophenols.
|Numero di pagine||6|
|Rivista||JOURNAL OF MATERIALS CHEMISTRY. C|
|Stato di pubblicazione||Published - 2018|
All Science Journal Classification (ASJC) codes
- Materials Chemistry
Saccone, M., Giese, M., Saccone, M., Siiskonen, A., Kuntze, K., Ahmed, Z., & Priimagi, A. (2018). Ortho-Fluorination of azophenols increases the mesophase stability of photoresponsive hydrogen-bonded liquid crystals. JOURNAL OF MATERIALS CHEMISTRY. C, 6, 9958-9963.