Syntheses, Characterizations and Applications of Dysprosium and Yttrium Complexes : Mononuclear Complexes with Amine-Bis(Benzotriazole Phenolate) and Nitrophenoxy Ligands for Ring-Opening Polymerization and Multinuclear Complexes with Schiff-Based Ligands for Single-Molecule Magnets

• Main Authors: Yun-Ting Liu, 劉芸廷
• Other Authors: 林柏亨
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/34476688964750129176

碩士 === 國立中興大學 === 化學系所 === 105 === The research’s interests focus on two related areas. The first part is about the syntheses, structures and catalytic properties for ring–opening polymerization (ROP) of lactide. In this part, there were sixteen dysprosium and yttrium complexes containing an amine-bis(benzotriazole phenolate) (C1NNBiBTP) ligand and co-ligand with differently electronic effect based on series of nitrophenol had been synthesized. Catalysis for ROP of L-LA of complexes 1-1~1-8 were investigated. Experimental results indicated complex [Y(C1NNBiBTP)(2,5-DNP)(MeOH)2]∙MeOH (1-5·MeOH) exhibited the greatest activity, giving biodegradable polyesters with the expected molecular weights and well molecular weight distributions. The second section based on the logical design of ligands with similar coordination sites, H4PHD and H4NdHb, were ultilized in the presence of dysprosium nitrate and dysprosium trifluoromethanesulfonate precursors and generated three hexanuclear complexes. [Dy(NO3)3]·5H2O with H4PHD ligand leading to complex 2-1 and with H4NdHb ligand leading to complex 2-3. Otherwise, [Dy(OTf)3] with H4NdHb ligand leading to complex 2-2. The magnetic properties of complexes 2-1 and 2-2 were measured by using Superconducting Quantum Interference Device. The AC measurements were shown out-of-phase (χ") signals that indicating the behavior of Single-Molecule Magnets.