Cation-tuned stimuli-responsive and optical properties of supramolecular hydrogels.
Cation-tuned stimuli-responsive and optical properties of supramolecular hydrogels.
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DOI：
10.1002/asia.201500274
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
Masamichi Yamanaka;K. Yanai;Yusuke Zama;Junko Tsuchiyagaito;Masaru Yoshida;A. Ishii;M. Hasegawa
中科院分区：
文献类型：
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作者：
Masamichi Yamanaka;K. Yanai;Yusuke Zama;Junko Tsuchiyagaito;Masaru Yoshida;A. Ishii;M. Hasegawa
展示了两亲三脲在水介质中的分级自组装。两亲性三脲和碱性溶液的混合物形成由纤维聚集体组成的粘性溶液。这种粘性溶液转化为超分子水凝胶，能够在几种阳离子触发下分级组织成更高阶的聚集体。得到的超分子水凝胶相对较硬，其存储模数可达10(3)pa以上。形成的水凝胶的刺激响应性和光学性质受到阳离子触发器的影响。质子和钙离子的触发剂分别提供了pH-和化学刺激响应性水凝胶。Tb离子触发器还通过从三脲到Tb的能量转移提供了一种高发光水凝胶。
Hierarchical self-assembly of an amphiphilic tris-urea in aqueous media is shown. A mixture of the amphiphilic tris-urea and an alkaline solution gave a viscous solution composed of fibrous aggregates. This viscous solution transformed into supramolecular hydrogels, which are capable of hierarchically organizing into higher-order aggregates in response to several cationic triggers. The resulting supramolecular hydrogels were relatively stiff and their storage moduli attained over 10(3) Pa. The stimuli-responsive and optical properties of the resulting hydrogels were influenced by the cationic trigger. Proton and calcium ion triggers gave pH- and chemical stimuli-responsive hydrogels, respectively. A terbium ion trigger also provided a highly luminescent hydrogel through energy transfer from the tris-urea to terbium.