Tough protein organohydrogels

Zhou, Dan; Fan, Chengxin; Wang, Jiahui; Li, Tianzhen; Li, Baijia; Zhang, Jie; Zhou, Xiaohu; Gan, Tiansheng; Handschuh‐Wang, Stephan; Zhou, Xuechang

doi:10.1039/c8tb02236d

Cited by 63 publications

(74 citation statements)

References 28 publications

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“…Typically, as-made hydrogels are used as 3D scaffold/matrix. By substituting the incorporated water of the hydrogels with an organic solvent, totally or in parts, organohydrogels are formed with depressed freezing point, altered mechanical properties [60] and also endowed with enhanced liquid retention in arid environments. [86] The term organohydrogel was probably first mentioned by Gua and Dong in 1997 in their work about organic phase enzyme electrodes, a work related to biosensing, [87] though, the authors did not utilize the antifreezing property of their organohydrogel, which comprised of polyhydroxyl cellulose (PHC), a mixture of poly(vinyl alcohol) (PVA) and carboxymethyl hydroxyethyl cellulose (CMHEC), and a mixture of dimethylformamide (DMF) and water as solvent.…”

Section: Fabrication Of Organohydrogelsmentioning

confidence: 99%

“…Since then, organohydrogels have attracted attention in the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 scientific community due to its advanced properties, such as high mechanical toughness, [60,86] long-term stability and resistance versus hot and cold environments. [87] Organohydrogels consist of hydrophilic and hydrophobic domains within the same microenvironment, rendering them able to incorporate simultaneously hydrophilic and hydrophobic cargo molecules, [88] such as solvents, dyes and antimicrobials.…”

Section: Fabrication Of Organohydrogelsmentioning

confidence: 99%

“…[58] Specifically, (tough) hydrogels endowed with electric conductivity are intriguing raw materials. [59] Therefore, these hydrogels have been successfully employed as key material by several research groups due to its processability, [60] tuneable mechanical properties [61] and interesting electronic properties. [62,63] What is more, hydrogels often exhibit desirable properties, such as self-healing [64] and selfadhesion, [65] rendering them promising candidates for human machine interfaces, [66] wearable electronics [67] and flexible sensors.…”

Section: Introductionmentioning

confidence: 99%

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Biomimetic Extreme‐Temperature‐ and Environment‐Adaptable Hydrogels

et al. 2019

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temperature-resistant hydrogels, hydrogels which are freezing-and dehydration-resistant, have garnered considerable attention in the scientific community as they extend the rage of application of hydrogels to arid and/or cold environments. Besides, these hydrogels exhibit tunable conductivity and mechanical performance while offering excellent biocompatibility and flexibility, making them interesting candidates for flexible and wearable electronics and (bio)sensors. Several biomimetic strategies were developed to fabricate anti-freezing and anti-dehydration hydrogels with a diversity of merits, such as high strain resistance and conductivity, even at sub-zero temperatures, and employed as (bio)sensors, electrodes, and energy-storage devices. This review summarizes the recent advances in the preparation and application of temperatureresistant hydrogels, indicates issues of the state-of-the-art hydrogels, and offers potential future research directions.

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Section: Fabrication Of Organohydrogelsmentioning

confidence: 99%

Section: Fabrication Of Organohydrogelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biomimetic Extreme‐Temperature‐ and Environment‐Adaptable Hydrogels

et al. 2019

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“…A double C−H activation is observed in the Rh III ‐catalyzed reaction of indolyloxopropanenitriles with alkynes leading to functionalized carbazoles (Scheme ) . The procedure is effective only with diaryl substituted alkynes and involves a first C−H activation leading to metalated intermediate 67 which by further cyclometalation affords 68 .…”

Section: Hydroindolation Of Alkynes and Allenesmentioning

confidence: 99%

Regioselective Direct C‐Alkenylation of Indoles

Petrini

2017

Chemistry A European J

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The direct introduction of alkenyl groups into the indole framework avoiding its preliminary functionalization can be carried out using different synthetic strategies. Transition-metal complexes facilitate the C-H activation of indoles or alkenes allowing an efficient Csp - Csp bond formation. The hydroindolation of alkynes catalyzed by the same metal complexes or various acidic promoters can also be pursued for the alkenylation process. Conjugate addition of electron-poor alkenes and direct condensation of carbonyl derivatives with indoles are also of interest for this purpose. The regiochemical control can be exploited using the intrinsic C-3 reactivity of the indole ring. The introduction of a suitable directing group at the nitrogen atom allows the preparation of C-2 alkenylated derivatives by transition metal catalyzed reactions. This review collects the fundamental contributions in this field reported in literature during the last fifteen years.

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“…The presence of a nitrogen atom in the 9 position enables easy coupling with other functional groups, without altering the electronic and photophysical properties of the molecule. Moreover, 1‐C to 8‐C positions can be easily functionalized with suitable groups, opening the route to the synthesis of many carbazole‐based derivatives …”

Section: Introductionmentioning

confidence: 99%

Carbazole‐Terpyridine Donor‐Acceptor Dyads with Rigid π‐Conjugated Bridges

et al. 2019

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A series of molecules in which 9H‐carbazole (electron donor, D) and 2,2′:6′,2′′‐terpyridine (electron acceptor, A) are connected through rigid π‐conjugated bridges (D‐π‐A systems) have been synthesized and their photophysical properties examined in detail, with the support of DFT calculations. The bridges are made of different sequences of ethynylene, phenylene, and anthracene groups. The synthetic strategies involve condensation of 2‐acetylpyridine with the aromatic aldehyde moiety on different functionalized π‐conjugated bridges and couplings with carbazole derivatives. The system incorporating anthracene in the bridge shows the typical absorption and emission fingerprints of this polycyclic hydrocarbon. The other systems have HOMOs and LUMOs centred, respectively, over the carbazole and the bridge and exhibit solvatochromic charge‐transfer (CT) luminescence with high photoluminescence yield up to 70 %, except when an ethynylene unit is directly attached to the carbazole ring, due to a trans‐bent non‐emissive π–σ* excited state.

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Tough protein organohydrogels

Cited by 63 publications

References 28 publications

Biomimetic Extreme‐Temperature‐ and Environment‐Adaptable Hydrogels

Biomimetic Extreme‐Temperature‐ and Environment‐Adaptable Hydrogels

Regioselective Direct C‐Alkenylation of Indoles

Carbazole‐Terpyridine Donor‐Acceptor Dyads with Rigid π‐Conjugated Bridges

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