Norbornyl benzocyclobutene ladder polymers: Conformation and microporosity

Lai, Holden W. H.; Liu, Sheng; Xia, Yan

doi:10.1002/pola.28640

Cited by 40 publications

(44 citation statements)

References 30 publications

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“…The spirocyclic component was crucial in increasing the polymer free volume, resulting in a BET surface area of 850 m 2 g −1 and selective gas permeability . Recently, Xia and co‐workers synthesized norbornyl benzocyclobutene ladder polymers from norbornadiene and dibromoarenes via catalytic arene‐norbornene annulation . The microporosity of these polymers was evidenced by BET surface areas of up to 720 m 2 g −1 .…”

Section: Additional Examples Of Polymer Network With Unique Chemistrmentioning

confidence: 99%

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Polymer Networks: From Plastics and Gels to Porous Frameworks

2020

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Polymer networks, which are materials composed of many smaller components—referred to as “junctions” and “strands”—connected together via covalent or non‐covalent/supramolecular interactions, are arguably the most versatile, widely studied, broadly used, and important materials known. From the first commercial polymers through the plastics revolution of the 20th century to today, there are almost no aspects of modern life that are not impacted by polymer networks. Nevertheless, there are still many challenges that must be addressed to enable a complete understanding of these materials and facilitate their development for emerging applications ranging from sustainability and energy harvesting/storage to tissue engineering and additive manufacturing. Here, we provide a unifying overview of the fundamentals of polymer network synthesis, structure, and properties, tying together recent trends in the field that are not always associated with classical polymer networks, such as the advent of crystalline “framework” materials. We also highlight recent advances in using molecular design and control of topology to showcase how a deep understanding of structure–property relationships can lead to advanced networks with exceptional properties.

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Section: Additional Examples Of Polymer Network With Unique Chemistrmentioning

confidence: 99%

“…[185] Recently,X ia and co-workers synthesized norbornyl benzocyclobutene ladder polymers from norbornadiene and dibromoarenes via catalytic arenenorbornene annulation. [186,187] The microporosity of these polymers was evidenced by BET surface areas of up to 720 m 2 g À1 .…”

Section: Microporous Polymer Network Without Covalent Crosslinkingmentioning

confidence: 99%

Polymer Networks: From Plastics and Gels to Porous Frameworks

2020

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“…Die spirocyclische Komponente war entscheidend für die Erhöhung des freien Volumens des Polymers, die zu einer BET‐Oberfläche von 850 m 2 g −1 und zu einer selektiven Gaspermeabilität führte . Kürzlich synthetisierten Xia und Mitarbeiter aus Norbornadien und Dibromarenen durch eine katalytische Aren‐Norbornen‐Anellierung Norbornylbenzocyclobuten‐Leiterpolymere . Die Mikroporosität dieser Polymere zeigte sich an BET‐Oberflächen von bis zu 720 m 2 g −1 .…”

Section: Beispiele Von Polymernetzwerken Mit Speziellen Chemisch/struunclassified

“…[185] Kürzlich synthetisierten Xia und Mitarbeiter aus Norbornadien und Dibromarenen durch eine katalytische Aren-Norbornen-Anellierung Norbornylbenzocyclobuten-Leiterpolymere. [186,187] Die Mikroporositätd ieser Polymere zeigte sich an BET-Oberflächen von bis zu 720 m 2 g À1 .…”

Section: Mikroporçse Polymernetzwerke Ohne Kovalente Vernetzungunclassified

Polymernetzwerke: Von Kunststoffen und Gelen zu porösen Gerüsten

Zhao

Johnson

2020

Angewandte Chemie

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Polymernetzwerke sind Materialien, die aus vielen kleineren Komponenten aufgebaut sind, die als “Vernetzungspunkte” und “Stränge” bezeichnet werden und über kovalente oder nichtkovalente/supramolekulare Wechselwirkungen miteinander verknüpft sind. Sie gehören zu den vielseitigsten, am häufigsten eingesetzten und wichtigsten Materialien. Von den ersten kommerziellen Polymeren über die Kunststoffrevolution des 20. Jahrhunderts bis in die Gegenwart gibt es nahezu keine Aspekte des modernen Lebens, die nicht von Polymernetzwerken beeinflusst werden. Dennoch müssen noch viele Herausforderungen in Angriff genommen werden, um ein vollständiges Verständnis dieser Materialien zu ermöglichen und ihre Entwicklung für künftige Anwendungen zu fördern, die von Energie‐Harvesting und Energiespeicherung bis zur Gewebezüchtung und additiven Fertigung reichen. Hier geben wir einen Überblick über die Grundlagen der Synthese, Struktur und Eigenschaften von Polymernetzwerken, unter Einbeziehung aktueller Trends auf dem Gebiet. Wir werden außerdem die neuesten Fortschritte bei der Anwendung des Moleküldesigns und der Steuerung der Topologie aufzeigen, um zu demonstrieren, wie ein tiefgehendes Verständnis der Struktur‐Eigenschaft‐Beziehungen zu hochentwickelten Netzwerken mit außergewöhnlichen Eigenschaften führen kann.

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“…Maleimide-containing copolymers are well-known to exhibit high glass transition temperatures, 44 excellent thermal stability, 45 and constrained torsional freedom 46 due to the presence of these intrachain rings, although not to the extent of fully ladder-type polymers like DNA. 47 Nevertheless, this enhanced rigidity likely limits the conformational freedom of polyelectrolyte chains upon association, leading to higher stiffness upon external stress at the macroscopic level. 48…”

Section: Solid and Fluid Behavior Of Bulk Polyelectrolyte Complexesmentioning

confidence: 99%

Patterning Polyelectrolyte Complexes with Alternating Monomer Sequence Distributions

Herzog‐Arbeitman¹,

Ting

Meng³

et al. 2019

Preprint

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Charge-driven complexation of polyelectrolytes in water is a fundamental phase separation phenomenon that is prevalent in nature and across the high-value technology landscape.Condensed ionic biopolymers often rely on multiple non-covalent driving forces in patterned sequences to carefully preserve hierarchical structure and direct emerging function, and while synthetic polyelectrolyte complex (PEC) assemblies have sought to emulate and recapitulate such associative capabilities into applications, molecular engineering design strategies to precisely modulate monomeric building blocks remain vastly limited. Here we describe an experimentally convenient and versatile approach to construct patterned PECs, comprising well-defined charged macromolecules with both ionic styrene and neutral maleimide units alternating in the chain sequence. The controlled chemical structure of the alternating polyelectrolytes directly impacted the physical properties of bulk complex assemblies, demonstrated by elevated salt resistance and differences in viscoelastic relaxation and stiffness. Analogously, by engineering alternating diblock polyelectrolyte architectures for micelle self-assembly, the kinetic formation and stability pathways of PEC micelles were tailored without modifying nanoparticle size, attributed to the reduction in charge density and increased core hydrophobicity. We conclude by showing how multiple segments of donor/acceptor styrene-maleimide blocks can be incorporated into model polyelectrolyte chains in semi-batch reactions, enabling avenues to further explore sequencecontrolled polymers that regulate placement of N-substituted maleimides in polymer encryption endeavors. This unique copolymerization approach integrates appealing aspects of precision polymer synthesis with programmable self-assembly for advancing new directions in chemistry, physics, and engineering related to the complexation of oppositely-charged designer polymers.

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Norbornyl benzocyclobutene ladder polymers: Conformation and microporosity

Cited by 40 publications

References 30 publications

Polymer Networks: From Plastics and Gels to Porous Frameworks

Polymer Networks: From Plastics and Gels to Porous Frameworks

Polymernetzwerke: Von Kunststoffen und Gelen zu porösen Gerüsten

Patterning Polyelectrolyte Complexes with Alternating Monomer Sequence Distributions

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