Syntheses and magnetic studies of manganese-lanthanide complexes

  • 林 宏軒

Student thesis: Master's Thesis

Abstract

This thesis consists of three parts The first part the 1-D chain complex {[MnIIDyIII(nppd)2(NO3)3(MeOH)]‧2MeOH?2H2O}∞ (1‧Dy) was synthesized from the reaction of Mn(NO3)2?4H2O and Dy(NO3)3?6H2O with Hnppd ligand The struc-ture of complex 1‧Dy was determined by single crystal X-ray crystallography Di-recting current (dc) magnetic susceptibility of the complex 1‧Dy indicates the exhibition of intramolecular ferromagnetic interactions between the metal ions The complex exhibits frequency-dependent out-of-phase signals in alternating current (ac) magnetic susceptibility measurement indicating the slow magnetic relaxation behaviors The second part the isostructural series of tetranuclear complexes [MnIII2LnIII2(saph)2(OAc)6(OMe)2] (Ln = Tb (2‧Tb) Dy (3‧Dy) Ho (4‧Ho)) were synthesized from the reactions of H2saph with lanthanide acetate salts and Mn(OAc)2?4H2O The structures of these complexes were determined by single crystal X-ray crystallography The various magnetic properties of complexes 2‧Tb?4‧Ho were studied and the elimination of QTM was measured by the ac magnetic susceptibility under different applied fields The third part the isostructural series of tetranuclear complexes [MnII2LnIII2(pyp)2(OAc)6(OMe)2(MeOH)2] (Ln = Gd (5‧Gd) Tb (6‧Tb) Dy (7‧Dy) Ho (8‧Ho) Er (9‧Er)) were synthesized from the reactions of Hpyp with lanthanide acetate salts and Mn(OAc)2?4H2O The structures of these complexes were determined by single crystal X-ray crystallography Directing current (dc) magnetic susceptibilities of the complexes 5‧Gd?9‧Er indicate the exhibition of intramolecular antiferromagnetic interactions between the metal ions
Date of Award2014 Sep 9
LanguageEnglish
SupervisorHui-Lien Tsai (Supervisor)

Cite this

Syntheses and magnetic studies of manganese-lanthanide complexes
宏軒, 林. (Author). 2014 Sep 9

Student thesis: Master's Thesis