On-demand gelation of ionic liquids using photoresponsive organometallic gelators
On-demand gelation of ionic liquids using photoresponsive organometallic gelators
复制标题
使用光响应有机金属凝胶剂按需凝胶化离子液体
DOI：
10.1039/d2sm00307d
复制
发表时间：
2022
期刊：
影响因子：
3.4
通讯作者：
Tomoyuki Mochida
中科院分区：
文献类型：
--
作者：
Ryo Sumitani;Masamichi Yamanaka;Tomoyuki Mochida
在外部刺激下离子液体凝胶或离子凝胶的可逆形成可以提高其多功能性并扩大其在电子、生物医学和微工程系统中的应用范围。在此，我们开发了在光照射下释放低分子量胶凝剂的有机金属化合物，这有助于离子液体（IL）的按需光胶凝。凝胶剂配位配合物的化学式为[Ru(C5H5)L]X (L = C6H5NHCONHC12H25; X = PF6, B(CN)4)。每种复合物都是易于合成且可与 IL 混溶的 IL。通过添加少量复合物，各种离子液体在紫外光照射下转化为凝胶。 PF6盐允许具有配位取代基的IL发生光凝胶化，而B(CN)4盐允许非配位IL发生光凝胶化，尽管反应较慢。这些凝胶在加热时发生逆反应并重新液化，并且对于具有配位阳离子的离子液体来说，光凝胶作用是可重复的。
The reversible formation of ionic liquid gels, or ionogels, upon external stimuli could improve their versatility and expand their application scope in electronic, biomedical, and micro-engineering systems. Herein, we developed organometallic compounds that release low-molecular-weight gelators upon photoirradiation, which facilitate the on-demand photogelation of ionic liquids (ILs). The chemical formulae of the gelator-coordinated complexes are [Ru(C5H5)L]X (L = C6H5NHCONHC12H25; X = PF6, B(CN)4). Each of the complexes were ILs that are easy to synthesize and miscible in ILs. By adding a small amount of the complex, various ILs were transformed to gels upon UV photoirradiation. The PF6 salt allowed the photogelation of ILs with coordinating substituents, whereas the B(CN)4 salt allowed the photogelation of non-coordinating ILs, albeit the reaction was slower. These gels underwent the reverse reaction and liquefied back when heated, and the photogelation was repeatable for ILs with coordinating cations.