Liu Xiaolin, Liu Qiang, Zhao Haixia, Zhuang Guilin, Ren Yanping, Liu Tao, Long Lasheng, Zheng Lansun
Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
Natl Sci Rev. 2023 Mar 6;10(4):nwad059. doi: 10.1093/nsr/nwad059. eCollection 2023 Apr.
Magnetoelectric (ME) materials induced by electron transfer are extremely rare. Electron transfer in these materials invariably occurs between the metal ions. In contrast, ME properties induced by electron transfer from an organic radical to a metal ion have never been observed. Here, we report the ME coupling effect in a mononuclear molecule-based compound [(CH)NCHCHBr][Fe(ClAn)(HO)] () [ClAn = chloranilate, (CH)NCHCHBr = (2-bromoethyl)trimethylammonium]. Investigation of the mechanism revealed that the ME coupling effect is realized through electron transfer from the ClAn to the Fe ion. Measurement of the magnetodielectric (MD) coefficient of indicated a positive MD of up to ∼12% at 10 Hz and 370 K, which is very different from that of ME materials with conventional electron transfer for which the MD is generally negative. Thus, the current work not only presents a novel ME coupling mechanism, but also opens a new route to the synthesis of ME coupling materials.
由电子转移诱导产生的磁电（ME）材料极为罕见。这些材料中的电子转移总是发生在金属离子之间。相比之下，从未观察到由有机自由基向金属离子的电子转移所诱导产生的ME特性。在此，我们报道了一种基于单核分子的化合物[(CH)NCHCHBr][Fe(ClAn)(HO)]（）[ClAn = 氯冉酸盐，(CH)NCHCHBr = （2 - 溴乙基）三甲基铵]中的ME耦合效应。对其机理的研究表明，ME耦合效应是通过从ClAn到Fe离子的电子转移实现的。对的磁介电（MD）系数的测量表明，在10 Hz和370 K时，其正MD高达约12%，这与具有传统电子转移的ME材料非常不同，后者的MD通常为负。因此，当前的工作不仅提出了一种新颖的ME耦合机制，而且还为ME耦合材料的合成开辟了一条新途径。
