Influence of chelating ligands on photomagnetic properties of two erbium(III) coordination polymers

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED Journal of Rare Earths Pub Date : 2023-11-27 DOI:10.1016/j.jre.2023.11.009

Xiaoshuang Gou, Zhonghang Chen, Jialong Jiang, Ning Liu, Wenlong Lan, Yuewei Wu, Peng Cheng, Wei Shi

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Abstract

The magnetization dynamics of lanthanide coordination compounds are fundamentals governing their potential applications such as information storage or molecular switches. Herein, two two-dimensional coordination polymers [Er(CA)_1.5(bpy) (DMF)]_n (1) and [Er(CA)_1.5(phen) (DMF)]_n (2) (H₂CA = 2,5-dichloro-3,6-dihydroxy-p-quinone, bpy = 2,2′-bipyridine, phen = 1,10-phenanthroline) were synthesized and fully characterized. By the irradiation of ultraviolet light, 1 and 2 were converted to 1a and 2a which contain light-generated radicals, inducing an increase of χ_MT at room temperature. A detailed study of the dynamic magnetic property shows that the magnetization dynamics observed for 1 and 1a are dominated by Raman process, but Orbach and Raman processes are observed in 2 and 2a. The structural factors influencing the magnetic properties of this photomagnetic system are discussed.

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螯合配体对两种铒配位聚合物光磁性能的影响

镧系配位化合物的磁化动力学是决定其潜在应用的基础，如信息存储或分子开关。本文合成了两种二维配位聚合物[Er(CA)1.5(bpy) (DMF)]n(1)和[Er(CA)1.5(phen) (DMF)]n (2) (H2CA = 2,5-二氯-3,6-二羟基-对醌，bpy = 2,2 ' -联吡啶，phen = 1,10-菲罗啉)并对其进行了表征。在紫外光照射下，1和2转化为含有光自由基的1a和2a，室温下χMT升高。详细的动态磁性能研究表明，1和1a的磁化动力学以拉曼过程为主，而2和2a的磁化动力学以奥巴赫和拉曼过程为主。讨论了影响该光磁系统磁性能的结构因素。

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来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.