A New Class of Dendritic Metallogels with Multiple Stimuli-Responsiveness and as Templates for the In Situ Synthesis of Silver Nanoparticles
作者:Zhi-Xiong Liu、Yu Feng、Zhi-Yong Zhao、Zhi-Chao Yan、Yan-Mei He、Xu-Jun Luo、Chen-Yang Liu、Qing-Hua Fan
DOI:10.1002/chem.201302780
日期:2014.1.7
solvophobic interaction, and π–π stacking, synergistically enable the formation of stable metallogels. Interestingly, these metallogels could intelligently respond to multiple external stimuli including temperature, chemicals, and shear stress, leading to gel–sol phase transitions. In addition, these dendritic metallogels were successfully applied as templates for the in situ formation and stabilization of
设计,合成并充分表征了一种新型的聚(芳醚)树枝状配体,该配体在焦点处具有吡啶官能团,并且通过金属-配体配位形成了相应的Ag I配合物。与树枝状配体相比,相应的树枝状复合物在非常低的临界胶凝浓度下对各种有机溶剂表现出更好的胶凝能力。可以通过将银离子结合到配体上来微调凝胶-溶胶相变温度和形态。初步研究表明,多种非共价相互作用,例如Ag I-吡啶配位,疏溶剂相互作用和π-π堆积可协同形成稳定的成金属元素。有趣的是,这些金属元素可以智能地响应多种外部刺激,包括温度,化学物质和剪切应力,从而导致凝胶-溶胶相变。另外,这些树枝状金属盐成功地用作模板,用于在不使用任何化学还原/稳定剂的情况下原位形成和稳定银纳米颗粒。