Development of functional electrodes using ionic liquid-modified substrates

合成了一种端烯基季铵盐离子液体，并制备了自组装单分子膜。由于离子液体单元之间的空间排斥和静电排斥，得到的离子液体修饰电极具有一定的空间。然后，在电极的空隙中引入能够激活O2分子的二铁络合物。最后，通过与GRubbs试剂的烯烃歧化反应，使末端烯烃发生了交联反应。二铁络合物被牢固地固定在离子液体层中。用旋转环盘电极测得O2还原过程中的电子数为n=3.8，表明4电子还原过程占主导地位。

A quaternary ammonium-type ionic liquid with terminal olefins was synthesized and its self-assembled monolayer was prepared. The obtained ionic liquid-modified electrode had spaces due to steric and electrostatic repulsions among the ionic liquid units on the electrode. Then, a diiron complex, which was able to activate O2 molecule, was introduced into the spaces on the electrode. Finally, terminal olefins were cross-linked by the olefin metathesis reaction with Grubbs reagent. The diiron complex was strongly immobilized in the ionic liquid layer. From the measurements by a rotating ring-disk electrode, the number of electrons during the O2 reduction was n = 3.8, indicating that the 4-electron reduction process was dominant.