Microphasic separation-induced enantiotropic liquid crystal behaviour single phenyl unit series based on the fluorophobic effect

Fornasieri, Giulia; Guittard, Frédéric; ́Ribaldi, S. Ge

doi:10.1080/0267829031000114998

Cited by 23 publications

(1 citation statement)

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“…In conclusion, if fluorine containing compounds have been described in the past for the elaboration of nonconventional liquid crystals or vesicles from microsegregation and self-organization, [32][33][34] we have shown, in this work, that the fluorine contained in electropolymerizable monomers can also contribute to induce surface morphology. Indeed, in the same polymerization conditions, highly fluorinated pyrroles give rise to spherical microstructures, whereas hydrocarbon pyrroles give almost smooth films.…”

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confidence: 51%

Fluorophobic Effect for Building up the Surface Morphology of Electrodeposited Substituted Conductive Polymers

Darmanin

Guittard

2009

Langmuir

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During the past decade, several works display the electrochemical polymerization of fluorinated monomers as a highly efficient method (one-pot method, mild conditions, various morphologies) to obtain superhydrophobic or superoleophobic surfaces. Here, we point out the fluorinated tails not only are useful to increase both hydrophobicity and oleophobicity but also are involved in the formation of surface structurations: two necessary conditions for liquid dewetting. To support this assertion, a series of fluorinated pyrrole derivatives and their hydrocarbon homologues were synthesized and electrochemically deposited in the same conditions. Whereas hydrocarbon pyrroles give rise to smooth films, structured films are achieved from fluorinated pyrroles. The abundance of the surface structurations depends on the length of the fluorinated tail.

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confidence: 51%

Fluorophobic Effect for Building up the Surface Morphology of Electrodeposited Substituted Conductive Polymers

Darmanin

Guittard

2009

Langmuir

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Microsegregation in Polyphilic Calamitic, Disklike,and Bent‐Core Mesogens

Tschierske

2014

Handbook of Liquid Crystals

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The Effect of Fluorination: A Crystallographic and Computational Study of Mesogenic Alkyl 4‐[2‐(Perfluorooctyl)ethoxy]benzoates

Yano¹,

Taketsugu²,

Hori³

et al. 2004

Chemistry A European J

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The series of alkyl 4-[2-(perfluorooctyl)ethoxy]benzoates (F8-n) shows a systematic change of crystal structures depending on the length of the alkyl chain: separate packing of perfluorooctyl (Rf) and alkyl (Rh) chains from each other for shorter (n=2) and longer (n=11) members, alternate packing of Rf and Rh chains for middle (n=6,7) members, and an intermediate type of packing for n=4. Semiempirical MO calculations show slightly repulsive interactions between the Rf chains, and attractive ones between Rf and Rh chains and between Rh and the core of a molecular pair. It is concluded that fluorination determines the molecular shape of the crystal structures by making the chain rigid. It is confirmed that the interactions between Rf chains are small compared with those between other moieties and that they are forced to aggregate owing to the exclusion from other moieties. Thus, the effect is dependent on the geometries and intermolecular interactions of the other moieties.

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Microphasic separation-induced enantiotropic liquid crystal behaviour single phenyl unit series based on the fluorophobic effect

Cited by 23 publications

References 24 publications

Fluorophobic Effect for Building up the Surface Morphology of Electrodeposited Substituted Conductive Polymers

Fluorophobic Effect for Building up the Surface Morphology of Electrodeposited Substituted Conductive Polymers

Microsegregation in Polyphilic Calamitic, Disklike,and Bent‐Core Mesogens

The Effect of Fluorination: A Crystallographic and Computational Study of Mesogenic Alkyl 4‐[2‐(Perfluorooctyl)ethoxy]benzoates

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