Liquid-crystalline fullerene–ferrocene dyads

Campidelli, Stéphane; Vázquez, Éster; Milić, Dragana; Prato, Maurizio; Barberá, Joaquín; Guldi, Dirk M.; Marcaccio, Massimo; Paolucci, Demis; Paolucci, Francesco; Deschenaux, Robert

doi:10.1039/b316085h

Cited by 94 publications

(65 citation statements)

References 30 publications

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“…The fullerene-ferrocene derivative was designed to develop photoactive liquid crystal switches by combining two sets of data: firstly, electron transfer was used to generate liquid crystalline ferrocenium derivatives from non-mesomorphic ferrocenes and, secondly, photoinduced electron transfer from ferrocene to C 60 was shown to occur in fullerene-ferrocene dyads. Between 2004 and 2006 Campidelli et al [190,191] synthesized and developed liquid crystalline dyads 55, 56 and 57 by applying the 1,3-dipolar cycloaddition reaction of fullerene, ferrocene and a second-generation dendrimer with a second-generation poly(arylester) dendrimer functionalized with cyanobiphenyl units as liquid crystalline promotor as illustrated in Fig. 38.…”

Section: Fullerene-ferrocene Liquid Crystalline Polymersmentioning

confidence: 99%

Organometallic Ferrocene- and Phosphorus-Containing Polymers: Synthesis and Characterization

Hussein

Asiri

2012

Designed Monomers and Polymers

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The inclusion of organometallic units into polymeric structures has attracted much attention in different fields according to the nature and behaviour of the inserted metal. Moreover, the discovery of organometallic polymers and their structural characterization initiated an explosive rebirth of organometallic chemistry. Organometallic moieties are in or pendent to the polymer backbone and examine some of the uses of the emergent metallocene polymers, and new uses are still being found for these remarkable organometallic moieties. This review gives a simple introduction to variable organometallic molecules and their characteristics. This review will focus on the syntheses and characterization of organometallic polymers, including ferrocene-and phosphorus-containing polymers. A general overview on ferrocene polymers with a special attention to ferrocene-containing liquid crystalline polymers (including a ferrocene moiety in the main chain, side-chain or dendrimers) and fullerene-ferrocene liquid crystalline polymers is presented. In addition, more details for synthesis and properties of phosphorus-containing polymers are illustrated.

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Section: Fullerene-ferrocene Liquid Crystalline Polymersmentioning

confidence: 99%

Organometallic Ferrocene- and Phosphorus-Containing Polymers: Synthesis and Characterization

Hussein

Asiri

2012

Designed Monomers and Polymers

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“…27 Fulleropyrrolidine bearing a ferrocene unit 14 showed a SmA phase between 40 and 135 1C with a partial bilayered arrangement in which the cyanobiphenyl groups are interdigitated from layer to layer. 28 In such a supramolecular organization, already proposed for the liquid-crystalline methanofullerenes containing cyanobiphenyl groups, the ferrocene moieties are localized between the C 60 units and the dendritic cores. Furthermore, the C 60 moieties of adjacent layers are located side-by-side, giving rise Fig.…”

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confidence: 99%

Liquid-crystalline fullerodendrimers

2007

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Addition of liquid-crystalline dendrimers onto [60]fullerene led to thermotropic liquid crystals which displayed various types of mesophases, including chiral nematic, smectic B, smectic A and columnar phases. This approach represents an interesting way for the design of self-organized structures based on [60]fullerene, and opens the way to optoelectronic applications for this carbon allotrope, such as for the development of photovoltaic devices and molecular switches.

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“…We designed mesomorphic materials by functionalizing [60]fullerene (nematic, chiral nematic, smectic A, smectic C, columnar phases) [9], [60]fullerene -ferrocene dyads (smectic A phase) [10], and diruthenium clusters (nematic and smectic A phases) [11] with liquid-crystalline dendrimers. The nature of the mesophases and the supramolecular organization within the liquid-crystal state could be controlled via the structure of the mesomorphic units, and the structure and size (generation) of the dendrons.…”

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Liquid‐Crystalline Thiol‐ and Disulfide‐Based Dendrimers for the Functionalization of Gold Nanoparticles. Preliminary Communication

Frein

Boudon

Vonlanthen

et al. 2008

Helvetica Chimica Acta

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Liquid-crystalline dendrons carrying either a thiol or disulfide function which display nematic, smectic A, columnar, or chiral nematic phases have been synthesized. Their mesomorphic properties are in agreement with the nature of the mesogenic units and structure of the dendrons. The first-generation poly(aryl ester) dendron containing two cyanobiphenyl mesogenic units was used to functionalize gold nanoparticles. For full coverage, a smectic-like supramolecular organization on the nanometer scale is observed, when the gold nanoparticles are spread onto carbon-coated copper grids. This result indicates that the dendritic ligands reported here act as self-organization promoters.Introduction. -Rational design of novel supramolecular materials for applications in optics, electronics, catalysis, and biomedical sciences is still a challenge [1], current interest with this aim being focused on the synthesis of thermotropic liquid-crystalline gold nanoparticles [2 -5]. Decorated gold nanoparticles are one of the most promising candidates for self-organization leading to bulk metamaterials, i.e., materials with nonconventional electromagnetic properties. It has already been shown that regular arrangements of metallic particles on different length scales can lead to negative magnetic permeability [6]. This opens the pathway to metamaterials in the visible light region, provided that the following conditions are fulfilled: the distance and organization of the particles have to be controlled, and there should be a possibility to compensate optical absorption by incorporation of active agents to allow energy transfer [7]. The first condition is fulfilled by the self-organization within the liquidcrystal phase itself, while the second one can be fulfilled by adding fluorescence dyes into the liquid-crystal materials.To generate mesomorphism, gold nanoparticles were functionalized with liquidcrystalline thiol derivatives [2 -4] via a ligand-exchange reaction from dodecane-1-thiol-stabilized gold nanoparticles [8]. Only in one case, the mesophase displayed by the materials could be identified [4]: an enantiotropic nematic phase was obtained for gold nanoparticles partly decorated with laterally-branched mesogens; the latter

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Liquid-crystalline fullerene–ferrocene dyads

Cited by 94 publications

References 30 publications

Organometallic Ferrocene- and Phosphorus-Containing Polymers: Synthesis and Characterization

Organometallic Ferrocene- and Phosphorus-Containing Polymers: Synthesis and Characterization

Liquid-crystalline fullerodendrimers

Liquid‐Crystalline Thiol‐ and Disulfide‐Based Dendrimers for the Functionalization of Gold Nanoparticles. Preliminary Communication

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