本論文中七個過渡金屬化合物[Co(4,4’- BIPY)(1,4-BDC)]n (1)、[Co(BPE)(1,4-BDC)]n (2)、 [Co (1,4-BDC)(H2O)2(TMD)2]n (3)、{[Co(H2O)4(4,4’- BIPY)](1,4-BDC)}n (4)、{[Co(H2O)4(4,4’- BIPY)](BPDC)}n (5)、{[Co(H2O)4(4,4’- BIPY)]( FUC)}n．4nH2O (6)、[Co(H2O)4(2,2’- BIPY)](1,4-BDC) (7) ( BPE = 1,2-Bis(4-pyridyl)-ethane、1,4-BDC = Terephthalic acid、2,2’- BIPY = 2,2’- Bipyridine、TMD = 4,4’-Trimethylene-dipyridine、4,4’- BIPY = 4,4’-Bipyridine、BPDC = Biphenyl-4,4’-dicorboxylic acid、FUC = Fumaric acid )，利用水熱法合成，並將得到的構造鑑定。
　　在化合物1和2中，亞鈷離子由當成橋基及螫合基的BDC所連結形成一個二維的架構，此二維的架構再由4,4’- BIPY及BPE連結形成一個三維的結構，此三維的結構為一個兩兩相互貫穿的構造。在化合物3，亞鈷離子由當單芽基的BDC所連結，另外再配位上兩個水分子及兩個TMD，形成一個一維的結構。化合物4~6中，亞鈷離子由4,4’- BIPY當成橋基連結，及配位四個水分子形成一個一維[Co(4,4’- BIPY)(H2O)4]2+主鏈，而未配位BDC、BPDC、FUC及結晶水則是利用氫鍵的作用以三明治的形式存在[Co(4,4’- BIPY)(H2O)4]2+鏈中，藉由氫鍵的作用，化合物4~6可當成三維結構的化合物。化合物7中亞鈷離子由2,2’- BIPY及四個水分子配位形成[Co(2,2’- BIPY)(H2O)4]2+單體，而BDC則是利用氫鍵的作用以三明治的形式存在於[Co(2,2’- BIPY)(H2O)4]2+之間，藉由氫鍵的作用，化合物7可以當成一維結構的化合物。磁性的測量的溫度由350~2 K，化合物1、4、5呈現反鐵磁性偶合作用，另外化合物3、7在高溫( 約100~350 K )範圍呈現鐵磁性，在化合物3、4、5、7中磁性的差異是由結構中BDC連結方式和分子內氫鍵的作用所造成，在此利用Curie-Weiss Law及雙核的公式來比對計算化合物1的交換偶合常數，以及利用Curie-Weiss Law來比對計算化合物3、4、5、7的交換偶合常數，所有化合物均作了IR光譜、UV-VIS光譜、原素分析、熱穩定度及發光等特性的鑑定。

　There are seven transition-metal complexes[Co(4,4’- BIPY)(1,4-BDC)]n (1)、[Co(BPE)(1,4-BDC)]n (2)、 [Co (1,4-BDC)(H2O)2(TMD)2]n (3)、{[Co(H2O)4(4,4’- BIPY)](1,4-BDC)}n (4)、{[Co(H2O)4(4,4’- BIPY)](BPDC)}n (5)、{[Co(H2O)4(4,4’- BIPY)]( FUC)}n．4nH2O (6)、[Co(H2O)4(2,2’- BIPY)](1,4-BDC) (7) ( BPE = 1,2-Bis(4-pyridyl)-ethane、1,4-BDC = Terephthalic acid、2,2’- BIPY = 2,2’- Bipyridine、TMD = 4,4’-Trimethylene-dipyridine、4,4’- BIPY = 4,4’-Bipyridine、BPDC = Biphenyl-4,4’-dicorboxylic acid、FUC = Fumaric acid )， have been hydrothermally prepared and structurally characterized .
　Each pair of metal atoms in compounds 1 and 2 are bridged by bis-bidentate and chelating bis-bidentate BDC ligands to form two-dimensional structures. Adjacent sheets are pillared by 4,4’- BIPY and BPE spacers into three-dimensional coordination network. Two-fold interpenetration of the above three-dimensional coordination networks results in stable crystal structures of compounds 1 and 2. In compound 3, cobalt ions are bridged by bis-monodentate BDC ligands and coordinated by two water molecules and two TMD to form one-dimensional structure. In compounds 4~6, cobalt ion bridged by 4,4’- BIPY and coordinated by four water molecules give rise to a one-dimensional [Co(4,4’- BIPY)(H2O)4]2+ chain, and the BDC, BPDC and FUC ligands and lattice water molecules are sandwiched between [Co(4,4’- BIPY)(H2O)4]2+ chain via hydrogen bonding form three-dimensional structures. In compound 7, cobalt ions are coordinated by 2,2’- BIPY and four water molecules form a monomer [Co(2,2’- BIPY)(H2O)4]2+ complexes, and BDC are sandwiched between [Co(2,2’- BIPY)(H2O)4]2+ via hydrogen bonding form one-dimensional structure. Variable-temperature ( 350~2 K ) magnetic susceptibility measurements and magnetization measurements at 2 K reveal that complexes 1, 4 and 5 have antiferromagnetic coupling while 3 and 7 have ferromagnetic coupling at high-temperature ( about 100~350 K ) range. Magnetostructural correlations have been made taking into consideration both the BDC bridging ligands and the existence of intermolecular hydrogen bonds in complexes 3, 4, 5 and 7. The magnetic exchange coupling between the cobalt centers for compounds 1, is analyzed on the basis of both the Curie-Weiss expression and a binuclear magnetic model and compounds 3, 4, 5 and 7 are analyzed on the basis of the Curie-Weiss expression. The synthesized products are characterized by IR spectroscopy, UV-VIS spectra, elemental ( EA ), thermogravimetric ( TGA ) and photoluminescence.

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