Efficient light-induced phase transitions in halogen-bonded liquid crystals

F. Pernandez-Palacio, M. Poutanen, M. Saccone (Corresponding Author), A. Siiskonen, G. Terraneo, G. Resnati, O. Ikkala, P. Metrangolo (Corresponding Author), A. Priimagi

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Abstract

Here, we present a new family of light-responsive, fluorinated supramolecular liquid crystals (LCs) showing efficient and reversible light-induced LC-to-isotropic phase transitions. Our materials design is based on fluorinated azobenzenes, where the fluorination serves to strengthen the noncovalent interaction with bond-accepting stilbazole molecules, and increase the lifetime of the cis-form of the azobenzene units. The halogen-bonded LCs were characterized by means of X-ray diffraction, hot-stage polarized optical microscopy, and differential scanning calorimetry. Simultaneous analysis of light-induced changes in birefringence, absorption, and optical scattering allowed us to estimate that
Original languageEnglish
Pages (from-to)8314-8321
JournalChemistry of Materials
Volume28
Issue number22
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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    Pernandez-Palacio, F., Poutanen, M., Saccone, M., Siiskonen, A., Terraneo, G., Resnati, G., Ikkala, O., Metrangolo, P., & Priimagi, A. (2016). Efficient light-induced phase transitions in halogen-bonded liquid crystals. Chemistry of Materials, 28(22), 8314-8321. https://doi.org/10.1021/acs.chemmater.6b03460