New wheel-shaped Ln_(6) clusters for conversion of CO_(2) and magnetic properties

作     者：Wenmin Wang Na Qiao Xiaoyan Xin Chen Yang Ying Chen Shanshan Dong Chenxi Zhang Wenmin Wang;Na Qiao;Xiaoyan Xin;Chen Yang;Ying Chen;Shanshan Dong;Chenxi Zhang

作者机构：College of Chemistry and MaterialsTaiyuan Normal UniversityJinzhong030619China College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjin300457China 

出 版 物：《稀土学报:英文版》 (Journal of Rare Earths)

年 卷 期：2023年第41卷第10期

页      面：1574-1582,I0004页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(2021L404) 

主　　题：Wheel-shaped Ln_(6)clusters Conversion of CO_(2) Magnetocaloric effect Single-molecular magnet behavior Rare earths 

摘      要：A series of novel hexanuclear lanthanide dusters,namely,[Ln_(6)(HL)_(6)(NO_(3))_(6)]·3CH_(3)CN(Ln=Gd(1),Tb(2),Dy(3)and Er(4))was assembled using a multidentate ligand H3L(trolamine).The clusters 1-4 show a wheel-shaped Ln_(6)topology with the approximate diameter and thickness of 1.5 and 0.7 nm,*** of them show high thermal *** the aspect of the catalytic capacities for the cycloaddition reactions of CO_(2)and epoxide,the reaction conditions,the substrate scope,and possible catalytic mechanism were *** highest yield for clusters 1-4 is up to 99%at 333 K for 12 *** particular,cluster 1 can be reused at least three times with no obvious loss of catalytic performance and keep the integrity of the crystal *** investigations reveal that cluster 1 exhibits a relatively large magnetocaloric effect with-ΔS_(m)=41.43 J/(kg·K)(T=3.0 K,7.0 T);while cluster 3 displays slow magnetic relaxation behavior under zero dc field with U_(eff)=0.51 K andτ_(0)=2.54×10^(-5)s.