Seeking magneto-structural correlations in easily tailored pentagonal bipyramid Dy (Ⅲ) single-ion magnets
Seeking magneto-structural correlations in easily tailored pentagonal bipyramid Dy （Ⅲ） single-ion magnets作者机构：Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of EducationSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China
出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)
年 卷 期：2020年第63卷第8期
页 面：1066-1074页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：supported by the National Key Research and Development Program of China(2018YFA0306001) the National Natural Sciences foundation of China(21620102002,21822508,21821003) the Pearl River Talent Plan of Guangdong(2017BT01C161)
主 题：single-molecule magnets magnetic anisotropy crystal field magneto-structural correlation
摘 要：Controlling molecular magnetic anisotropy via structural engineering is delicate and fascinating,especially for single-molecule magnets(SMMs).Herein a family of dysprosium single-ion magnets(SIMs)sitting in pentagonal bipyramid geometry have been synthesized with the variable-size terminal ligands and counter anions,through which the subtle coordination geometry of Dy(Ⅲ)can be finely tuned based on the size *** effective energy barrier(Ueff)successfully increases from 439 to 632 K and the magnetic hysteresis temperature(under a 200 Oe/s sweep rate)raises from 11 to 24 *** on the crystal-field theory,a semi-quantitative magneto-structural correlation deduced experimentally for the first time is revealed that the Ueff is linearly proportional to the structural-related value S20 corresponding to the axial coordination bond lengths and the bond *** the evaluation of the remanent magnetization from hysteresis,quantum tunneling of magnetization(QTM)is found to exhibit negative correlation with the structural-related value Stun corresponding to the axial coordination bond angles.
维普期刊数据库
同方期刊数据库