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三维开壳层单线态双自由基金属笼的制备与表征
发表时间：2021-12-31 浏览量：632 下载量：98
| 全部作者： | 刘昭岳，李滔 |
| 作者单位： | 湖南大学化学化工学院 |
| 摘 要： | 通过配位自组装成功制备了含有多氯代三苯甲基三羧酸盐（polychlorinated triphenylmethyl tricarboxylate，PTMTC）的中性金属笼M1或双自由基金属笼M2. M2的固态电子顺磁共振（electron paramagnetic resonance，EPR）波谱的较大谱宽、禁阻跃迁信号以及相关自旋参数均表明分子内存在自旋-自旋相互作用，并且负的耦合常数证明双自由基的基态为开壳层单线态。本文开发了一种新的自由基体系，有助于研究三维有机自由基金属笼的分子内自旋-自旋相互作用。超分子自由基为理解自旋-自旋相互作用提供了一种新的思路，在有机磁性材料中具有潜在的应用前景。 |
| 关 键 词： | 有机化学；配位自组装；金属笼；双自由基；自旋-自旋相互作 |
| Title： | Preparation and characterization of three-dimensional diradical metallacage with open-shell singlet state |
| Author： | LIU Zhaoyue, LI Tao |
| Organization： | College of Chemistry and Chemical Engineering, Hunan University |
| Abstract： | Neutral metallacages M1 or diradical metallacages M2 with polychlorinated triphenylmethyl tricarboxylate (PTMTC) were successfully prepared through a coordination self-assembly approach. The large spectral width, the forbidden transition signal and the spin parameters of the solid-state electron paramagnetic resonance (EPR) spectra of M2 indicated an intramolecular spin-spin interaction, and the negative coupling constant proved that the ground state of the double radical was an open-shell singlet state. This study developed a new radical system, which is helpful for studying the intramolecular spin-spin interaction in three-dimensional organic radical metalacages. The supramolecular radicals will help understand spin-spin interactions from a new perspective and have potential application prospect in organic magnetic materials. |
| Key words： | organic chemistry; coordination self-assembly; metallacage; diradical; spin-spin interactions |
| 发表期数： | 2021年12月第4期 |
| 引用格式： | 刘昭岳，李滔. 三维开壳层单线态双自由基金属笼的制备与表征[J]. 中国科技论文在线精品论文，2021，14（4）：518-525. |
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