Enozawa Hideo, Ukai Shusaku, Ito Hiroshi, Murata Tsuyoshi, Morita Yasushi
Department of Applied Chemistry, Faculty of Engineering , Aichi Institute of Technology , Toyota , Aichi 470-0392 , Japan.
Org Lett. 2019 Apr 5;21(7):2161-2165. doi: 10.1021/acs.orglett.9b00468. Epub 2019 Mar 21.
A sodium salt of a polycyclic trioxotriangulene (TOT) anion with six triethylene glycol chains exhibiting the formation of a colored ionic liquid at room temperature was synthesized. The ionic liquid is air- and water-stable, reflecting thermodynamic stabilization of a charge-delocalized TOT anion. Upon protonation of the TOT anion, the salt shows halochromic behaviors in solution and even in the neat liquid state with HCl vapor. The ionic liquid shows no morphological change with the chromism, presumably as a result of poor intermolecular interactions between π skeletons.
合成了一种具有六个三甘醇链的多环三氧代三角烯（TOT）阴离子的钠盐，该钠盐在室温下会形成有色离子液体。该离子液体对空气和水稳定，这反映了电荷离域的TOT阴离子的热力学稳定性。TOT阴离子质子化后，该盐在溶液中甚至在与HCl蒸汽接触的纯液态下都表现出加酸变色行为。该离子液体的变色过程中未观察到形态变化，这可能是由于π骨架之间的分子间相互作用较弱所致。
