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Chemical Programming of the Domain of Existence of Liquid Crystals
Author(s) -
Dutronc Thibault,
Terazzi Emmanuel,
Guénée Laure,
Buchwalder KerryLee,
Floquet Sébastien,
Piguet Claude
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201503420
Subject(s) - thermotropic crystal , liquid crystal , materials science , molecule , phase transition , melting temperature , enthalpy , entropy (arrow of time) , domain (mathematical analysis) , thermodynamics , chemical physics , work (physics) , phase (matter) , amphiphile , liquid crystalline , chemistry , organic chemistry , polymer , physics , mathematics , composite material , mathematical analysis , optoelectronics , copolymer
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.