作者:Masatoshi Kozaki、Shogo Nakamura、Kazunobu Sato、Takeji Takui、Takeaki Kamatani、Masaji Oda、Katsumi Tokumaru、Keiji Okada
DOI:10.1016/s0040-4039(98)01227-1
日期:1998.8
]s were prepared and oxidized to generate the corresponding bis-DPPH diradicals. No triplet species was observed for the compounds with X = H in the ESR measurement. Modification of the central benzene ring (X = Me) and N-phenyl group (Y = OMe, Ph, t-Bu) allowed the detection of their triplet diradicals. Especially, the diradical with X = Me, Y = t-Bu was successfully purified, isolated at 0 °C as
制备了一系列的1,1'-(2,4-二-X-苯-1,3-二基)双[1-(4-Y-苯基)-2-吡啶并肼]并氧化生成相应的bis- DPPH diradicals。在ESR测量中,对于X = H的化合物,未观察到三重态。中心苯环(X = Me)和N-苯基(Y = OMe,Ph,t -Bu)的修饰使得可以检测到它们的三重双自由基。尤其是,成功纯化了X = Me,Y = t -Bu的双基,在0°C时分离为紫色固体,并显示为三重基态。