AUTHOR=Sheng Yu , Jiang Yu-Jing , Cheng Zi-Hang , Liu Ru-Chan , Ge Jing-Yuan , Gao Feng 

TITLE=Syntheses, structures, and magnetic properties of acetate-bridged lanthanide complexes based on a tripodal oxygen ligand

JOURNAL=Frontiers in Chemistry

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2022.1021358

DOI=10.3389/fchem.2022.1021358

ISSN=2296-2646

ABSTRACT=Four homodinuclear lanthanide complexes, Dy2(LOEt)2(OAc)4 (1), Tb2(LOEt)2(OAc)4 (2), Ho2(LOEt)2(OAc)4 (3), and Gd2(LOEt)2(OAc)4 (4) have been synthesized and characterized based on a tripodal oxygen ligand Na[(η5-C5H5)Co(P(O)(OC2H5)2)3] (NaLOEt). Structural analyses show that the acetate anions bridge two symmetry-related Ln3+ ions in the μ2:η1:η1 and μ2:η1:η2 coordination patterns, and each lanthanide(III) ion owns a twisted square antiprism (SAPR) conformation. Static magnetic meausements reveal the weak intramolecular ferromagnetic interaction between dysprosium(III) ions in 1, and antiferromagnetic Ln3+···Ln3+ couplings in the other three complexes. Through the analysis of the ligand-field effect and magnetic anisotropy axis orientation, the reasons for the lack of dynamic magnetic behavior in 1 were identified.