Handzlik Gabriela, Magott Michał, Arczyński Mirosław, Sheveleva Alena M, Tuna Floriana, Sarewicz Marcin, Osyczka Artur, Rams Michał, Vieru Veacheslav, Chibotaru Liviu F, Pinkowicz Dawid
Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland.
School of Chemistry and Photon Science Institute , The University of Manchester , Oxford Road , Manchester M13 9PL , United Kingdom.
J Phys Chem Lett. 2020 Feb 20;11(4):1508-1515. doi: 10.1021/acs.jpclett.9b03275. Epub 2020 Feb 7.
A homoleptic gadolinium(III) complex with the smallest helicene-type ligand, 1,10-phenanthroline-,'-dioxide (phendo) Gd(phendo)·MeOH (phendo = 1,10-phenanthroline-,'-dioxide, MeOH = methanol), shows slow relaxation of the magnetization characteristic for Single Ion Magnets (SIM), despite negligible magnetic anisotropy, confirmed by ab initio calculations. Solid state dilution magnetic and EPR studies reveal that the magnetization dynamics of the [Gd(phendo)] cation is controlled mainly by a Raman process. Pulsed EPR experiments demonstrate long phase memory times (up to 2.7 μs at 5 K), enabling the detection of Rabi oscillations at 20 K, which confirms coherent control of its spin state.
一种具有最小螺旋烯型配体1,10 - 菲咯啉 - 5,6 - 二氧化物（phendo）的纯配体钆（III）配合物Gd(phendo)·MeOH（phendo = 1,10 - 菲咯啉 - 5,6 - 二氧化物，MeOH = 甲醇），尽管通过从头算计算证实其磁各向异性可忽略不计，但仍表现出单离子磁体（SIM）特有的磁化缓慢弛豫。固态稀释磁性和电子顺磁共振研究表明，[Gd(phendo)]阳离子的磁化动力学主要由拉曼过程控制。脉冲电子顺磁共振实验表明其具有较长的相位记忆时间（在5 K时长达2.7 μs），能够在20 K下检测到拉比振荡，这证实了对其自旋态的相干控制。
