Phototriggered Formation of a Supramolecular Polymer Network Based on Orthogonal H-Bonding and Host-Guest Recognition

Bai, Ruixue; Yang, Xue; Zhao, Jun; Zhang, Zhaoming; Yan, Xuzhou

doi:10.1007/s40242-023-3056-7

Cited by 6 publications

(2 citation statements)

References 43 publications

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“…[7,15], but also chemical interactions such as host-guest, hydrogen bonding, Van der Waals, etc. [38]. Fick's law is one of the most effective approaches to analyse the diffusion process and calculate diffusion coefficients.…”

Section: Fig 4 a Schematic Representation Of The Interaction Mechanis...mentioning

confidence: 99%

Surface plasmon resonance chemical sensor modified with α-naphthylmethacrylate nano thin film for chloroform detection

Acikbas

2023

Res. Eng. Struct. Mat.

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The research on the rapid and sensitive detection of pollution caused by the products and technologies used has recently attracted attention in the literature. In the detection of volatile organic compounds (VOCs), polymers/monomers are used in the production of sensitive, fast-responding, reversible thin-film gas sensor elements. In this work, the monomer α-Naphthylmethacrylate was selected as thin film sensor element. The α-Naphthylmethacrylate-based nano thin films were prepared with technique of LB. Monomer LB thin films fabricated onto gold-coated glass substrate to investigate their vapour sensing properties by using Surface Plasmon Resonance (SPR) optical technique. This prepared monomer-based thin film sensor exposed to five different concentrations of chloroform vapors varying between 13.98x103-69.9x103 ppm and the sensor response values were recorded. Swelling dynamics’ of this monomer thin film sensor was also illuminated by using Fick's early-time diffusion law. Diffusion coefficients of α-Naphthylmethacrylate LB thin film sensor materials exposed to the five different concentrations of chloroform vapor were calculated with the help of reflected light intensity graph data and Fick's Law as a function of time. It was determined that the diffusion coefficient values of the first and second slope regions as varying between 5.72x10-17-21.97x10-17 cm2s-1 and 3.06x10-17-6.25x10-17 cm2s-1, respectively. SPR kinetic measurement results showed that α-Naphthylmethacrylate material is promising for the detection of chloroform vapor.

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Section: Fig 4 a Schematic Representation Of The Interaction Mechanis...mentioning

confidence: 99%

Surface plasmon resonance chemical sensor modified with α-naphthylmethacrylate nano thin film for chloroform detection

Acikbas

2023

Res. Eng. Struct. Mat.

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“…The most well-known MIMs are rotaxanes 26 , 27 and catenanes 28 – 30 . Such sophisticated topological structure allows for abundant dynamic behaviors, which thus bestow unique features upon the resultant mechanically interlocked materials: i) The existence of supramolecular templates allows mechanical bonds to respond to various stimuli such as acid/base, force, and heat, which induces intramolecular movements to modulate the material’s properties 31 – 37 . ii) The motion of mechanical bonds facilitates the dissipation of energy without requiring the separation of their components, which preserves the structural integrity and represents a unique mechanism for energy dissipation 38 – 40 .…”

Section: Introductionmentioning

confidence: 99%

Stimuli-responsive mechanically interlocked polymer wrinkles

Yang,

Chen,

Zhang

et al. 2024

Nat Commun

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Artificial wrinkles, especially those with responsive erasure/regeneration behaviors have gained extensive interest due to their potential in smart applications. However, current wrinkle modulation methods primarily rely on network rearrangement, causing bottlenecks in in situ wrinkle regeneration. Herein, we report a dually cross-linked network wherein [2]rotaxane cross-link can dissipate stress within the wrinkles through its sliding motion without disrupting the network, and quadruple H-bonding cross-link comparatively highlight the advantages of [2]rotaxane modulation. Acid stimulation dissociates quadruple H-bonding and destructs network, swiftly eliminating the wrinkles. However, the regeneration process necessitates network rearrangement, making in situ recovery unfeasible. By contrast, alkaline stimulation disrupts host–guest recognition, and subsequent intramolecular motion of [2]rotaxane dissipate energy to eliminate wrinkles gradually. The always intact network allows for the in situ recovery of surface microstructures. The responsive behaviors of quadruple H-bonding and mechanical bond are orthogonal, and their combination leads to wrinkles with multiple but accurate responsiveness.

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A Crown‐Ether‐Based Elastomer Bearing Loop Structures with Dissipating Characteristics and Enhanced Mechanical Performance

Zhao,

Zhang,

Wei

et al. 2024

Angewandte Chemie

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Loops are prevalent topological structures in cross‐linked polymer networks, resulting from the folding of polymer chains back onto themselves. Traditionally, they have been considered as defects that compromise the mechanical properties of the network, leading to extensive efforts in synthesis to prevent their formation. In this study, we introduce the inclusion of cyclic dibenzo‐24‐crown‐8 (DB24C8) moieties within the polymer network strands to form CCNs, and surprisingly, these loops enhance the mechanical performances of the network, leading to tough elastomers. The toughening effect can be attributed to the unique cyclic structure of DB24C8. The relatively small size and the presence of rigid phenyl rings provide the loops with relatively stable conformations, allowing for substantial energy dissipation upon the application of force. Furthermore, the DB24C8 rings possess a broad range of potential conformations, imparting the materials with exceptional elasticity. The synergistic combination of these two features effectively toughens the materials, resulting in a remarkable 66‐fold increase in toughness compared to the control sample of covalent networks. Moreover, the mechanical properties, particularly the recovery performance of the network, can be effectively tuned by introducing guests to bind with DB24C8, such as potassium ions and secondary ammonium salts.

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Phototriggered Formation of a Supramolecular Polymer Network Based on Orthogonal H-Bonding and Host-Guest Recognition

Cited by 6 publications

References 43 publications

Surface plasmon resonance chemical sensor modified with α-naphthylmethacrylate nano thin film for chloroform detection

Surface plasmon resonance chemical sensor modified with α-naphthylmethacrylate nano thin film for chloroform detection

Stimuli-responsive mechanically interlocked polymer wrinkles

A Crown‐Ether‐Based Elastomer Bearing Loop Structures with Dissipating Characteristics and Enhanced Mechanical Performance

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