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Chemical Programming of the Domain of Existence of Liquid Crystals |
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| Authors: | Thibault Dutronc Priv‐Doz?Dr Emmanuel Terazzi Dr Laure Guénée Kerry‐Lee Buchwalder Dr Sébastien Floquet Prof?Dr Claude Piguet |
| Affiliation: | 1. Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, Geneva 4, Switzerland;2. Laboratory of Crystallography, University of Geneva, Geneva 4, Switzerland;3. Institut Lavoisier de Versailles, UMR 8180, University of Versailles Saint-Quentin-en-Yvelines, Versailles, France |
| Abstract: | This work illustrates how enthalpy and entropy changes responsible for successive phase transitions of cyanobiphenyl‐based liquid crystals can be combined to give cohesive free energy densities. These new parameters are able to rationalize and quantify the demixing of the melting and clearing processes that occur in thermotropic liquid crystals. Minor structural variations at the molecular level can be understood as pressure increments that alter either the melting or clearing temperatures in a predictable way. This assessment of microsegregation operating in amphiphilic molecules paves the way for the chemical programming of the domain of existence of liquid‐crystalline phases. |
| Keywords: | cyanobiphenyls liquid crystals phase transitions structure elucidation thermodynamics |
