Pyridine-Dicarbohydrazone-Based Polyacrylate Hydrogels with Strong Mechanical Property, Tunable/Force-Induced Fluorescence, and Thermal/pH Stimuli Responsiveness
Pyridine-Dicarbohydrazone-Based Polyacrylate Hydrogels with Strong Mechanical Property, Tunable/Force-Induced Fluorescence, and Thermal/pH Stimuli Responsiveness
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基于吡啶二碳腙的聚丙烯酸酯水凝胶具有强机械性能、可调/力诱导荧光和热/pH 刺激响应性
DOI：
10.1021/acsapm.1c00541
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发表时间：
2021-08
影响因子：
5
通讯作者：
Jinqing Qu
中科院分区：
文献类型：
--
作者：
Ye Yuan;He Zhang;Jinqing Qu
具有可调谐荧光的智能荧光水凝胶已被用作生物传感器、探针、发光器件以及信息存储和保密。然而，它们通常表现出单一刺激响应性，并且具有弱的机械性能，这限制了它们的应用。在此，我们报告了一种基于吡啶-二碳腙的聚丙烯酸酯水凝胶（制备的水凝胶和Eu-水凝胶），其显示出强的机械性能、可调谐的荧光能力以及热和pH刺激响应性。采用光诱导胶束共聚法制备了水凝胶，并通过Eu 3 +-（吡啶-二碳腙）配位反应得到了Eu-水凝胶。所制备的水凝胶可以制成大尺寸（边长为15 cm），表现出1.55MPa的拉伸强度和800%的断裂拉伸应变。Eu-水凝胶的荧光强度可由[Eu 3 +]调节（接近[Eu 3 +] = 0.1 mol时最小状态的655%）。结果表明，Eu-水凝胶在拉伸过程中显示力诱导的荧光变色响应。所制备的水凝胶的透射温度范围为36至42 °C。可逆的Eu 3 +-（吡啶-二碳腙）配位使得Eu-水凝胶具有优异的抗疲劳性。所制备的水凝胶和Eu-水凝胶的pH刺激响应性由可切换的共价腙键触发。在形状记忆能力方面，Eu ~（3+）可使水凝胶重构，H ~+可使Eu ~（3+）水凝胶变形。这种具有多刺激响应行为的机械强度（吡啶-二碳腙）基聚丙烯酸酯水凝胶有望用于信息传输、智能窗户、承重装置、能量吸收材料和软穿戴装置。
The smart fluorescent hydrogels exhibiting tunable fluorescence have been used as biosensors, probes, light-emitting devices, and information storage and confidentiality. However, they usually show single stimuli responsiveness and possess weak mechanical properties, which limit their applications. Herein, we report a pyridine-dicarbohydrazone-based polyacrylate hydrogel (the As-prepared hydrogel and Eu-hydrogel) showing strong mechanical property, tunable fluorescence ability, and thermal and pH stimuli responsiveness. The As-prepared hydrogel is prepared by light-induced micellar copolymerization, and Eu-hydrogel is obtained after the formation of Eu3+-(pyridine-dicarbohydrazone) coordination. The As-prepared hydrogel could be made in large size (side length of 15 cm), exhibiting a tensile strength of 1.55 MPa and a fracture tensile strain of 800%. The fluorescence intensity of Eu-hydrogel is tunable by [Eu3+] (approaching 655% of the minimum state at [Eu3+] = 0.1 mol). It is demonstrated that Eu-hydrogels display force-induced fluorochromic response during stretching. The transmittance temperature of the As-prepared hydrogel ranges from 36 to 42 °C. Reversible Eu3+-(pyridine-dicarbohydrazone) coordination enables Eu-hydrogels to have excellent fatigue resistance. The pH stimuli responsiveness of the As-prepared hydrogel and Eu-hydrogel is triggered by switchable covalent hydrozone bonds. In terms of the shape-memory ability, the As-prepared hydrogel could be reconstructed by Eu3+and Eu-hydrogel could be deformed by H+. This mechanically strong (pyridine-dicarbohydrazone)-based polyacrylate hydrogel with multistimuli responsive behaviors is promising to be used in information transmission, smart windows, load-bearing devices, energy-absorbing materials, and soft wearable devices.
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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通讯作者：
Jinqing Qu
DOI：
10.3390/ph13120436
发表时间：
2020-11-30
期刊：
Pharmaceuticals (Basel, Switzerland)
影响因子：
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作者：
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通讯作者：
Bonnet CS
DOI：
10.1002/asia.201500274
发表时间：
2015-06
期刊：
Chemistry, an Asian journal
影响因子：
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