Ionic Self-Assembly of Dendrimers

Concellón, Alberto; Iguarbe, Véronica

doi:10.1007/978-3-031-00657-9_4

Cited by 4 publications

(1 citation statement)

References 113 publications

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“…Among the diverse non-covalent interactions that hold molecular building blocks together, electrostatic interactions have recently shown high potential to create LCs with promising properties as ion-conductors or drug delivery systems. [15][16][17] In these ionic materials, the presence of charged sites within the molecular structure results in a cooperative assembly process that leads to self-organized nanostructures both in solution and in solid state. The most representative example are ionic dendrimers that are capable of self-organizing in the bulk to produce LC behavior even without being functionalized with any promesogenic unit.…”

Section: Introductionmentioning

confidence: 99%

Ionic self-assembly of pillar[5]arenes: proton-conductive liquid crystals and aqueous nanoobjects with encapsulation properties

Marín,

Merino,

Barberá

et al. 2023

Mater. Adv.

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Section: Introductionmentioning

confidence: 99%

Ionic self-assembly of pillar[5]arenes: proton-conductive liquid crystals and aqueous nanoobjects with encapsulation properties

Marín,

Merino,

Barberá

et al. 2023

Mater. Adv.

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Ionic Liquid Crystalline Calixarene with Photo‐Switchable Proton Conduction

Serrano

Concellón

Marín

et al. 2023

Helvetica Chimica Acta

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We have developed a new strategy for the preparation of a light‐responsive ionic liquid crystal (LC) that shows photo‐switchable proton conduction. The ionic LC consists of a bowl‐shaped calix[4]arene core ionically functionalized with azobenzene moieties. The non‐covalent architectures were obtained by the formation of ionic salts between the carboxylic acid group of an azo‐derivative and the terminal amine groups of a calixarene core. The presence of ionic salts results in a hierarchical self‐assembly process that extends to the formation of a nanostructured lamellar LC arrangement (smectic A phase). In this LC phase, the ionic LC calixarene is able to display proton conductive properties, since the ionic nanosegregated areas (formed by the ionic pairs) generate the continuous channels that favor proton transport. The optical and photo‐responsive properties were studied by UV‐Vis spectroscopy, demonstrating that the azobenzene moieties of the ionic LC undergo reversible (E)‐to‐(Z) isomerization by irradiation with UV light. Interestingly, this (E)‐to‐(Z) photoisomerization results in a decrease of the proton conductivity values since the bent‐shaped (Z)‐isomer disrupts the lamellar LC phase. This isomerization process is totally reversible and leads to an ionic LC material with unique photo‐switchable proton conductive properties.

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