“…Since the first member (t-butylferrocenylnitroxide) was reported at 1969 [1], the family of metallocenyl substituted nitroxide radical (McNO) became an important kind of compounds in the interdisciplinary field between organometallic and free radical field [2][3][4]. Most McNOs research had focused on discussing the intermolecular ferromagnetic interaction, and aimed at the preparation of high-spin materials [5,6], but other potential properties and application of McNOs have been extensively overlooked.…”