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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:126  下载量:16
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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