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Highly compressible glass-like supramolecular polymer networks
Zehuan Huang ; Xiaoyi Chen ; Stephen J. K. O’Neill , et al. Nat. Mater.,2022,21(1):103-109. DOI: 10.1038/s41563-021-01124-x PubMed ID: 34819661
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Abstract: Supramolecular polymer networks are non-covalently crosslinked soft materials that exhibit unique mechanical features such as self-healing, high toughness and stretchability. Previous studies have focused on optimizing such properties using fast-dissociative crosslinks (that is, for an aqueous system, dissociation rate constant kd?>?10?s?1). Herein, we describe non-covalent crosslinkers with slow, tuneable dissociation kinetics (kd?1?s?1) that enable high compressibility to supramolecular polymer networks. The resultant glass-like supramolecular networks have compressive strengths up to 100?MPa with no fracture, even when compressed at 93% strain over 12 cycles of compression and relaxation. Notably, these networks show a fast, room-temperature self-recovery (< 120?s), which may be useful for the design of high-performance soft materials. Retarding the dissociation kinetics of non-covalent crosslinks through structural control enables access of such glass-like supramolecular materials, holding substantial promise in applications including soft robotics, tissue engineering and wearable bioelectronics.
Purchased from AmBeed: 2243-54-1 ; 17201-43-3 ; 589-15-1 ; 106797-53-9 ; 622-95-7 ; 16004-15-2 ; 7646-67-5
CAS No. : | 16004-15-2 | MDL No. : | MFCD00209656 |
Formula : | C7H6BrI | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | BQTRMYJYYNQQGK-UHFFFAOYSA-N |
M.W : | 296.93 | Pubchem ID : | 954258 |
Synonyms : |
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Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P280-P305+P351+P338-P310 | UN#: | 3261 |
Hazard Statements: | H314 | Packing Group: | Ⅱ |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
61% | With potassium carbonate; potassium iodide; In acetonitrile; at 80℃; for 1h; | Preparation G: tert-butyl (3-(4-iodobenzyl)-3-azabicyclo[3.1.0]hexan- 6-yl)carbamate: To a stirred solution of <strong>[198211-38-0]6-(Boc-amino)-3-azabicyclo[3.1.0]hexane</strong> (0.250 g, 1.26 mmol) in MeCN (10 mL) were added K2C03 (0.52 g, 3.78 mmol), 4-iodobenzyl bromide (0.449 g, 1.51 mmol) and KI (0.006 g, 0.0378 mmol). The resulting reaction mixture was heated at 80 C for 1 h. The solvent was removed under reduced pressure and the residue was partitioned between DCM (100 mL) and water (25 mL). The org. layer was separated and the aq. layer was extracted with DCM (2 x 25 mL). The combined org. layers were washed with water (2 x 25 mL). The evaporation residue was purified by CC (DCM-MeOH) to afford the title compound as a beige solid (0.32 g, 61% yield). XH NMR (i/6-DMSO) delta: 7.66 (d, J = 8.3 Hz, 2H); 7.06 (d, J = 8.3 Hz, 2H); 6.90 (m, 1H); 3.48 (s, 2H); 2.88 (d, J = 8.8 Hz, 2H); 2.68 (d, J = 0.3 Hz, 1H); 2.30 (d, J = 8.4 Hz, 2H); 1.37 (s, 9H). MS (ESI, m/z): 414.96 [M+H+] for CnHnNzOzI; tR = 0.68 min. |
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