Dendrimeric and Hyperbranched Liquid Crystal Structures

Fluorinated liquid crystalline dendrimers

“…The achievement of LC order and the type of exhibited mesophase depend on the balance between the different component's trends. [7,12] For example, in the case of side-chain LC dendrimers, moieties with different flexibility and chemical nature are placed in close confinement (figure 2a). [16,17] On the one hand, the branched dendritic structure tends to be isotropically distributed (figure 2b).…”

“…As it will be further described in this review (section 2.2), the incorporation of units via ionic modification of the peripheral groups of dendrimers yields LC structures. [7,12,[18][19][20] These ionic dendrimers possess three different parts that can undergo segregation: the dendrimer body, the incorporated moieties and the ionic region composed by the ionic groups from the peripheral groups of the dendrimer and the introduced moieties. The ionic part forces the separation between the dendrimer body and the introduced moieties, and this segregation causes their mesomorphic behaviour even when moieties that lack mesogenic behaviour such as simple alkyl chains are introduced.…”

“…Thus, current LC dendrimers investigation is also focused on the search for applications for these materials. [12] Several approaches have been followed to obtain LC behaviour within dendrimers. The most extended and traditional strategy has been the introduction of mesogenic units in the dendrimeric structure.…”

“…[4][5][6] Dendrimer Dendron Dendronized polymer Hyperbranched polymer Among their remarkable properties, these molecules have demonstrated to be an ideal scaffold to produce molecular self-organisation, which has led to a diversity of liquid crystalline (LC) phases. [7][8][9][10][11][12] Initially research on LC dendrimers dealt with the achievement of mesogenic behaviour in dendrimeric structures, as well as the systematic study of the relationship between the chemical structure of the dendrimer and its supramolecular organisation. One of the most exciting characteristics of LC dendrimers is the possibility to combine the properties of the dendrimer scaffold with the anisotropic properties provided by the liquid crystalline order.…”

Multifunctional ionic hybrid poly(propyleneimine) dendrimers surrounded by carbazole dendrons: liquid crystals, optical and electrochemical properties

“…5 The majority of these mesogenic dendrimers have been obtained using a covalent attachment of the molecules, 6 but also the ionic attachment of molecules bearing a carboxylic group to the amine terminal groups of the poly(propylene imine) (PPI) and poly(amidoamine) (PAMAM) dendrimers has demonstrated to be an easy and versatile strategy to produce mesomorphic materials.…”