Magnetic Interactions through a Nonconjugated Framework Observed in Back-to-Back Connected Triazinyl-Nitroxyl Biradical Derivatives
作者:Yusuke Takahashi、Ryo Matsuhashi、Youhei Miura、Naoki Yoshioka
DOI:10.1002/chem.201800163
日期:2018.6.4
derivatives, with the structure of a back‐to‐back connected benzotriazinyl and tetramethyl or tetraethylisoindoline N‐oxyl sharing a common benzo ring, 3‐tert‐butyl‐1‐phenyl‐1,4,6,8‐tetrahydro‐6,6,8,8‐tetramethyl‐pyrrolo[4,5‐g]‐1,2,4‐benzotriazin‐4‐yl‐7‐oxyl (1‐tBu), 1,3‐diphenyl‐1,4,6,8‐tetrahydro‐6,6,8,8‐tetramethyl‐pyrrolo[4,5‐g]‐1,2,4‐benzotriazin‐4‐yl‐7‐oxyl (1‐Ph), and 3‐tert‐butyl‐1‐phenyl‐1,4,6,8‐tetrahydro‐6
三个杂双自由基衍生物,背对背连接的苯并三嗪基和四甲基或四乙基异吲哚啉N-氧基共享一个共同的苯并环,3-叔丁基-1-1-苯基-1,4,6,8-四氢-6,6,8,8-四甲基吡咯并[4,5- g ] -1,2,4-苯并三嗪-4-基-7-氧基(1 - t Bu),1,3-二苯基-1, 4,6,8-四氢-6,6,8,8-四甲基-吡咯并[4,5- g ] -1,2,4-苯并三嗪-4-基-7-氧基(1-Ph)和3 -叔丁基-1-苯基-1,4,6,8-四氢-6,6,8,8-四乙基吡咯并[4,5 - g ] -1,2,4-苯并三嗪-4-基- 7‐氧(2 ‐ t Bu),通过单晶X射线分析,可变温度磁化率研究和DFT计算来合成和表征。1 t Bu,1 Ph和2 t Bu的磁化率与温度的关系分别在70 K,71 K和43 K处显示出极大的最大值。尽管这些自由基衍生物在固态下形成柱状或链状组装体,但对聚合物基质中