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雙配位基之鋅配位聚合物的合成與鑑定 ; Hydrothermal Synthesis, Crystal Structures and Properties of Zinc Coordination Polymers by Mixed Ligand

Published in 2010 by 許玉林, Ju-Lin Hsu
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

在本論文中,我們介紹以水熱法所合成的四個配位聚合物,其分子式分別為[Zn(BDC)(bpp)]?1.5H2O (1)、[Zn3(BDC)3(mIM)2] (2)、[Zn(H2DOBDC)(H2O)2] (3)、[Zn(H2DOBDC)(bpp)] (4)。其中的有機配位基如2-Methylimidazole (mIM)是 2-甲基咪唑、4,4'-Trimethylenedipyridine (bpp)是4’4-三甲基雙吡啶、1,4-benzenedicarboxylate anion (BDC)是1.4-苯二甲酸陰離子、2,5-dihydroxyterephthalate anion (H2DOBDC)是2,5-二羥基對苯二甲酸陰離子。單晶X光繞射分析顯示化合物1是二維四方格骨架結構,相互貫穿形成一個3D的骨架結構;化合物2是以六個BDC連接三個Zn中心金屬而形成一個穩定的三維骨架結構;化合物3是一維無限延伸的鋸齒鏈狀(zigzag chain)骨架結構,以H2DOBDC配位基與Zn中心金屬互相連結,其鋸齒鏈狀之間則以氫鍵穩定骨架結構;化合物4是二維無限延伸層狀結構,相鄰的兩個二維矩形格結構相互貫穿,形成二重交錯層狀結構,此層狀結構之間,以苯環或吡啶環之間所產生的π-π作用力來穩定整個化合物的堆疊結構;以上的四個化合物還利用其它的分析儀器來驗證其物理與化學性質,這些鑑定包含了粉末X-光繞射分析、熱重分析、元素分析、紅外光共振光譜、螢光光譜和紫外-可見光吸收光譜等。 ; In this dissertation ,we present four new coordination polymers, namely [Zn(BDC)(bpp)] (1), [Zn3(BDC)3(mIM)2]?1.5H2O (2), [Zn(BDC)(H2O)2] (3), and [Zn(H2DOBDC)(bpp)] (4) based on isomerous 4,4’-trimethylene dipyridine (bpp), 1,4-benzenedicarboxylate anion (BDC), 2-Methylimidazole (mIM), and 2,5-dihydroxyterephthalate anion (H2DOBDC). All compounds have been synthesized by middle temperature hydrothermal reactions and characterized by single crystal X-ray diffraction. Compounds 1 is 2D layers with rectangular grids and interpenetrated to each other to form three-dimensional structure. Compound 2 is a 3D structure which was combined with Zn and BDC. Compound 3 is 1D infinite zigzag chain linked by H2DOBDC anions and Zn centers. The H2DOBDC ligand has intra-and inter- layer H-bond to from stable architecture. The compound 4 is two-fold 2D sheets. The adjacent rectangular grids are interpenetrated and together as thickness layers. The expanded direction along the layers has the ?-? stacking by aromatic rings. All the four compounds have been further characterized by powder X-ray diffraction, thermogravimetric analysis, photoluminescence, elemental analysis, IR and UV-Visible spectra.