Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: networks and linear polymers created from<i>tris</i>- and<i>bis</i>-functionalised pyridyl networking agents

Greuel, Jason R.; Andrews, Timothy E.; Wichman, Justin J.; Tessner, Joshua D.; Wiegel, Kurt N.

doi:10.1080/02678292.2010.531404

Cited by 19 publications

(9 citation statements)

References 36 publications

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“…In each, the smectic phase was observable only in the optical analysis -it was too weak of a transition to be observed in thermograms. The overall loadings of the nPD agent were markedly higher in these systems as compared to pre viously reported analogous networked and polymeric systems (37)(38). Such networks, when created utilis ing a smaller bisbenzoic acid hydrogen bond accep tor (tetraethyleneglycoxy bis-4-benzoic acid) utilising loadings of 4PD, 3PD and 2PD agents eliminated liq uid crystallinity at 25%, 31% and 22.5%, respectively.…”

Section: Results Summary and Common Trendsmentioning

confidence: 67%

“…The synthesis of 4PD, 3PD and 2PD have been previously described. (37,38) The synthesis of 5EOBBA is described later in this report. All compounds used in this study can be found in Scheme 1.…”

Section: Materials Usedmentioning

confidence: 99%

“…Previous work (36)(37)(38)(39) in our laboratory involved a flexible bis-acid and mixtures of a rigid bi-pyridyl and a non-mesogenic tetrapyridyl species. These produced supramolecular networks with variable liquid crys talline characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of flexible bis-acids and a mixture of rigid and flexible polypyridyls

Miesen¹,

Friday²,

Wiegel³

2011

Liquid Crystals

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A series of novel liquid crystalline supramolecular networks formed through hydrogen bonds have been synthe sised. These networks are based on flexible bi-benzoic acid and two types of pyridyl species -a small rigid bipyridyl capable of forming liquid crystalline phases and polyfunctional non-mesogenic pyridyl species that can compete for available hydrogen bond donor molecules. It was found that the networks display monotropic nematic char acter at high concentrations of disrupting net points -up to 50% for tetrapyridyls, 40% for tripyridyls and 35% for bipyridyls. Weak smectic phases were observed in all systems in loadings up to 10% of each disrupting unit. It is believed that the reversibility of the hydrogen bond allows for the formation of the ordered mesophases in the presence of the non-liquid crystalline groups.

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Section: Results Summary and Common Trendsmentioning

confidence: 67%

Section: Materials Usedmentioning

confidence: 99%

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Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of flexible bis-acids and a mixture of rigid and flexible polypyridyls

Miesen¹,

Friday²,

Wiegel³

2011

Liquid Crystals

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“…Previous work [36][37][38][39][40] in our laboratory involved a flexible bisacid and mixtures of a rigid bi-pyridyl and a non-mesogenic tetrapyridyl species. These produced supramolecular networks with variable liquid crystalline characteristics.…”

Section: Introductionmentioning

confidence: 99%

Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of rigid networking agents in supramolecular systems

et al. 2012

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“…In contrast to covalent polymers, they are noncovalent, mechanically interlocked structures of promising properties. [106][107][108][109][110][111][112] The crown ether-based, pseudorotaxane type supramolecular polymers are used in preparation of interesting structures. However it should be taken into account that for preparation of large supramolecular polymers, the monomers with high association constants are necessary.…”

Section: Examplementioning

confidence: 99%

Rotaxanes and pseudorotaxanes with threads containing pyridinium units

Deska¹,

Kozłowska²,

Śliwa³

2013

Arkivoc

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In this review, a continuation of an earlier one concerning rotaxanes with threads containing viologen units, the syntheses and properties of rotaxanes with threads bearing quaternary pyridinium units are described, along with their possible applications. In the first part rotaxanes containing bis(dipyridiniumyl)ethane unit in the thread are presented; they include species with stoppers incorporating metal complexes. The second part concerns rotaxanes formed by anion templation, they are divided into those involving the Grubbs RCM procedure for construction of a ring, and those employing rings built by condensation reactions. Then rotaxanes synthesized with the use of previously prepared rings are described. The third part deals with rotaxane molecular machines, especially those bearing mannosyl moieties. In the last part pseudorotaxanes containing crown ether based cryptands as rings, are shown.

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Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: networks and linear polymers created fromtris- andbis-functionalised pyridyl networking agents

Cited by 19 publications

References 36 publications

Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of flexible bis-acids and a mixture of rigid and flexible polypyridyls

Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of flexible bis-acids and a mixture of rigid and flexible polypyridyls

Supramolecular main-chain liquid crystalline polymers and networks with competitive hydrogen bonding: a study of rigid networking agents in supramolecular systems

Rotaxanes and pseudorotaxanes with threads containing pyridinium units

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