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Photo-switching behaviour in liquid crystalline materials incorporating a non-planar dithienylcyclopentene core and their birefringence properties.
- Source :
- Liquid Crystals; Sep2022, Vol. 49 Issue 11, p1475-1487, 13p
- Publication Year :
- 2022
-
Abstract
- Reversible photochromic phase transition of non-planar dithienylcyclopentene-containing liquid crystalline molecules has been studied in this work. All materials showed the smectic A and nematic phases in the cooling process and had reversible and high interconversion yield >90% between colourless-open/blue-closed isomers in the liquid crystalline state as well as in solution by UV- and visible light-irradiation alternatively, as confirmed by nuclear magnetic resonance spectroscopy, polarised optical microscopy, differential scanning calorimetry, powder X-ray diffraction and UV-visible spectroscopy. The thermal stability of both isomers also ensures that they can maintain liquid crystalline phases during ring-open and ring-closure reactions. Their birefringence is between 0.1 and 0.2, which is comparable to that of standard liquid crystalline materials used in optical applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02678292
- Volume :
- 49
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Liquid Crystals
- Publication Type :
- Academic Journal
- Accession number :
- 158962923
- Full Text :
- https://doi.org/10.1080/02678292.2022.2044529