Syntheses and Magnetic Properties of Dinuclear,Hexanuclear, Nonanuclear and HexadecanuclearLanthanide Clusters by Using Schiff-Based Ligands

• Main Authors: Che-Jung Kuo, 郭哲榮
• Other Authors: 林柏亨
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/81581252263961515755

碩士 === 國立中興大學 === 化學系所 === 104 === In the research, two kinds of Schiff-base ligands, 1,5-Bis(2-hydroxy- 3-methoxybenzylidene)carbonohydrazide (H2hmc) and1,5-Bis (salicylidene)carbohydrazide (H2sch), were ultilized and generated two dinuclear, a nonanuclear, a hexanuclear and a hexadecanuclear complexes. All of complexes were well studied by using X-ray single crystal diffraction for crystal structures and Superconducting Quantum Interference Device for measuring magnetic properties. There is a similar structure of [Dy2(Hhmc)2(NO3)4] (1) which has a high energy barrier but complex (1) is not a SMM. [Dy9( μ 3-O)4(μ-OH)6(hmc2-)4(NO3)4(DMF)4] (2) has a specific structure which has never been published. The [Dy2(μ-O)(shc)(NO3)2 (DMF)3(H2O)] (3) has non-parallel magnetic anisotropy which might cause multiple magnetic relaxation processes, and the single magnetic behavior with a high energy barrier has been observed.The [Dy6(sch)3(CO3)3( μ 3-O) (MeOH)14(H2O)] (4) composed of two Dy3 triangular units was found to exhibit slow magnetic relaxation.The [Dy16( μ 3-OH)18( μ 3-O)6(shc)6 (H2O)18(OH)] (5) is the first hexadecanuclear pure lanthanide complex in previous research.