通过电子状态调制的磁海绵行为
Jun Zhang1,2, Wataru Kosaka1, Kunihisa Sugimoto3
1Institute for Materials Research , Tohoku University , 2-1-1 Katahira , Aoba-ku, Sendai 980-8577 , Japan.
Journal of the American Chemical Society
|April 5, 2018
概括
这项研究使用磁性海绵材料演示了可切换的分子磁铁. 溶解/解溶周期可逆调节电子和结构状态,改变磁性排序温度约70K.
科学领域:
- 分子磁性
- 材料科学
- 超分子化学
背景情况:
- 对于分子磁性材料来说,可逆磁变化至关重要.
- 刺激引起的旋转变化可以显著改变磁性特性.
研究的目的:
- 证明与电子和结构修改相关的可逆磁变化.
- 在D2A型层磁铁上研究溶解/解溶效应.
主要方法:
- 一个D2A类层磁铁的合成:{Ru2(O2CPh-2,3,5-Cl3) 4}2(TCNQMe2) ·4DCM.
- 通过溶解/解溶周期对电子和结构状态进行表征.
- 磁性测量,包括基里温度 (Tc) 的测定.
主要成果:
- 最初的化合物在Tc=101K时表现出铁磁排序,这是由于一个电子转移的电荷排序状态.
- 溶剂去除 (解溶) 产生了一个无溶剂的化合物,其电荷不成比例的无序状态.
- 在Tc = 34K下,解溶化合物呈现了降低的铁磁顺序.
结论:
- 通过溶解/解解诱导的电子和结构调制实现了可逆磁变化 (ΔTc ≈ 70 K).
- 这项研究突出了磁性海绵在调节性分子磁性的潜力.
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