本文分三個部分，第一部分，以自製的多牙配位基L1，與氯化銅、硝酸鑭系反應，合成一系列 [CuII2LnIII(L1)2(Cl)3(DMF)2(μ3-OH)(NO3)] (Ln = Gd (1), Tb (2), Dy (3), Y (4))。以單晶X光繞射確定結構，由多牙配位基L1、μ3-OH、μ2-Cl橋接形成近似等腰三角形的結構。直流磁化率(direct current susceptibility, DC)測量，4·Y MT 值隨著溫度下降而下降，因金屬離子YШ為逆磁性，此現象歸因於CuП金屬離子間的反鐵磁交互作用力。1·Gd MT 值為先下降再上升，推論金屬間存在鐵磁交互作用力，利用哈密頓算符 (Hamiltonian Ĥ) 擬合 1·Gd MT 值得到交互作用力gCu = 2.017、 JCu1Gd = 2.775 cm-1、 JCu2Gd = 2.775 cm-1和 JCu1Cu2 = -13.211 cm-1。綜合分析兩錯合物的結果，金屬自旋處於一個spin frustration的狀態。交流磁化率(alternating current susceptibility, AC)的量測，2·Tb和3·Dy在零磁場下皆有磁緩現象。在1000 Oe 外加磁場下，2·Tb異向能為Ueff = 19.53 K；3·Dy異向能為Ueff = 19.90 K。
第二部分，以自製的triketone配位基L2，與過氯酸銅、醋酸鑭系反應，合成一系列 [CuII3LnIII3(L2)3(ClO4)2(OAC)5(OH)2(H2O)] (Ln = Tb(5), Dy(6), Er(7), Y(8)) 。以單晶X光繞射確定結構。化合物為六核金屬錯化物，三核銅金屬與三核鑭系金屬組成兩個同心的三角形結構。銅離子為外三角形且有較長的距離。直流磁化率量測，5·Tb–8·Y MT 值皆隨溫度下降而下降，為反鐵磁交互作用力。交流磁化率的量測，觀察到5·Tb和6·Dy有磁緩現象，因顯著的量子穿隧效應(QTM)影響，在低溫為拖尾的訊號，在 3000 Oe外加磁場下，得到5·Tb的異向能為 Ueff = 43.02 K；6·Dy為 Ueff = 65.77 K。
第三部分，以自製的配位基L3與過氯酸銅、氯化鑭系反應，得到一系列 [CuIIDyIII(L3)2Cl(H2O)4]Cl2 (Ln = Gd(9), Tb(10), Dy(11), Er(12),Y(13))。以單晶X光繞射確定結構，鑭系金屬配位環境除L3橋接外，皆為中性水分子配位。交流磁化率的量測，10·Tb和11·Dy有磁緩現象。10·Tb在1000 Oe外加磁場下，抑制大部分QTM，得到異向能為Ueff = 17.51 K。11·Dy在零磁場下，為拖尾的訊號。在1000 Oe加磁場下，有效地增加訊號，得到異向能為Ueff = 417.80 K。相較於沒有乙基的類似物，11·Dy在配位基上多了立體障礙，可使軸向性晶場修飾更偏向180˚，有更好的磁性表現。

The work contains three parts. In first part, the ligand L1 was prepared. Copper-lanthanide triangular trinuclear complex [CuII2LnIII(L1)2(Cl)3(DMF)2(μ3-OH)(NO3)]·solvent (Ln = Gd (1), Tb (2), Dy (3), Y (4)) has been synthesized by constituting multidentate ligand, copper(II) salt, and lanthanide(III) salt. The metal centers are bridged by β-diketone ligands, μ3-hydroxide, and μ2-chloride, resulting a [CuПLnШ(μ3-OH)(μ2-Cl)] core as well as almost isosceles triangle geometry of three nuclear. Direct current (DC) magnetic susceptibility measurements reveal the presence of intramolecular anti-ferromagnetic interaction between two Cu(II) center in 4·Y. In 1·Gd, ferro/anti-ferromagnetic interaction simultaneously behave leading to the existence of spin frustration. Alternating current (AC) magnetic susceptibility measurements point out that slow relaxations of the magnetization exhibit in 2·Tb and 3·Dy with and without field. Ueff = 19.53 K and τ0=8.36× 〖10〗^(-9) for 2·Tb; Ueff = 19.90 K and τ0 = 1.05 ×〖10〗^(-7) for 3·Dy are obtained by analyzing AC magnetic susceptibility result.
In second part, the ligand L2 was prepared. CuП3DyШ3 hexanuclear complexes [CuII3LnIII3(L2)3(ClO4)3(OAC)4(OH)2(H2O)]·solvent(Ln = Tb(5), Dy(6), Er(7), Y(8)) has been synthesized by constituting multidentate ligand, copper(II) salt, and lanthanide(III) salt. The structures data were determined by X-ray crystallography and expose that three Cu(II) and three Ln(III) ions construct in two concentric triangle. In DC measurement, χMT values decrease as temperatures decrease, and this result may cause by anti-ferromagnetic interaction and/or depopulation of spin-orbit coupled mJ states. In AC measurement, slow relaxations of the magnetization are observed in 5·Tb and 6·Dy. For 5·Tb, Ueff = 43.02 K and τ0=1.54× 〖10〗^(-12); for 6·Dy, Ueff = 65.77 K and τ0=4.06× 〖10〗^(-13) with applied field.
In third part, The ligand L3 was prepared. Copper-lanthanide dinuclear complexes [CuIIDyIII(L3)2Cl(H2O)4]Cl2·solvent (Ln = Gd(9), Tb(10), Dy(11), Er(12),Y(13)) were synthesized by multidentate ligand, copper salt, and lanthanide(III) salt. Structural studies demonstrate that the LnШ centers coordinated with only ligands and neutral aqua groups. AC data indicate complexes 10·Tb and 11·Dy exhibiting slow relaxations of the magnetization. Under 1000 Oe applied field, 10·Tb shows maximum peaks as function of temperature and successfully suppress QTM. For 11·Dy, out-of-phase signal (χM″) were enhanced with external 1000 Oe field leading to Ueff = 417.80 K and τ0=2.40× 〖10〗^(-12). To compare with analogue which have exactly same structure yet without ethyl group, 11·Dy performed large energy barrier and more axial crystal field.

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