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在Dy (III) 基光色复合体中操纵单分子磁铁的开/关行为
Yu-Juan Ma1, Ji-Xiang Hu1, Song-De Han1
1College of Chemistry and Chemical Engineering , Qingdao University , Shandong 266071 , P. R. China.
Journal of the American Chemical Society
|January 21, 2020
概括
研究人员开发出新的以化物为基础的链复合物,表现出可逆室温光色和光磁. 这些材料表现出由光触发的可切换单分子磁铁行为,为光学开关和磁性记忆铺平了道路.
科学领域:
- 材料科学
- 磁力学
- 摄影化学
背景情况:
- 开发在室温下具有可切换磁性质的材料对于光学开关和磁性存储器等先进技术至关重要.
- 利用光色学和光磁学来实现单分子磁体 (SMM) 的行为仍然是材料科学中的一个重大挑战.
研究的目的:
- 合成和描述能够在RT表现出光色和光磁性质的基于化物的新型链复合物.
- 研究这些材料中光诱导的SMM行为的机制,并探索它们的潜在应用.
主要方法:
- 用基乙二酸盐 (HEDP) 和2,4,6-三4-化 (TPT) 合成的化 (Dy,Gd,Y) 链复合物.
- 进行紫外线照射实验以诱导光色和光磁效应.
- 测量磁性特性以评估SMM的行为和磁放松动态.
主要成果:
- 合成的复合物 (QDU-1) 在紫外线照射时在RT显示可逆光色和光磁行为.
- 这些现象的原因是涉及光生成基的光诱导电子转移 (PET) 机制.
- 在没有应用直流电场的情况下,Dy(III) 同源表现出强烈的铁磁合和缓慢的磁放松,在RT照明后显示出SMM行为.
- 这项研究报告了首次在以兰化物为基础的材料中观察到可逆RT光色和光磁性.
结论:
- 开发的化物复合物为光控制的磁性提供了一个新的平台.
- 观察到的激素触发的SMM开启/关闭行为为设计光诱导的SMM在光学开关和磁性存储器件中的潜在使用提供了新的策略.
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