Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/96267
標題: Dysprosium and Transition Metal Complexes with Schiff-Base Ligands : Synthesis, Structural Characterizations, Magnetic and Sorption Properties
以希夫鹼配位基合成鏑與過渡金屬錯合物:結構鑑定、磁性性質及吸附性質之研究
作者: Li-Sheng Chen
陳立勝
關鍵字: 希夫鹼配位基
單分子磁鐵
金屬有機骨架材料
Schiff-base ligands
Single molecule magnets
Metal-organic frameworks
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摘要: This thesis is composed of two major parts, including the studies of single-molecule magnets(SMMs) and metal-organic framworks(MOFs). Two kinds of Schiff-base ligands, tmeda-hb and tmeda-hi, were ultilized to synthesize complexes. First part, there was one dysprosium complexes containing tmeda-hb (1-1), and there were there dysprosium complexes containing tmeda-hi(1-2~1-4). Among them, complex 1-2 was a dinuclear cluster containing chloride bridge. The magnetic properties of complex 1-2 were measured by using superconducting quantum interference device (SQUID) with an energy barrier of 2 K at zero field. The AC measurements were shown out-of-phase (χ') signals that indicating the behavior of SMMs. Second part, there was one dysprosium complexes containing tmeda-hi(2-1), and there was four transition metal complexes containing tmeda-hb or tmeda-hi (2-2~2-5). Unfortunately, we were fail to synthesize 3d-4f complexes. However, a novel three-dimensional Ni2+ metallic-organic frameworks (2-4) had been synthesized and structurally characterized. The sorption properties of complex 2-4 were measured by Accelerated Surface Area and Porosimetry system (ASAP). The B.E.T. (Brunauer-Emmett-Teller) surface areas were 323.2 m2 /g−1 for complex 2-4.
本論文區分成兩個部分,分別是單分子磁鐵磁性性質的研究以及金屬有機骨架材料對於氣體吸附的研究,藉由希夫鹼配位基tmeda-hb和tmeda-hi來進行合成。 第一部分皆是使用鑭系金屬進行養晶,利用tmeda-hb合出單核錯合物1-1,並利用tmeda-hi合成出雙核錯合物1-2,其具有罕見的氯離子架橋。因此希望能藉由tmeda-hi配位基合成出其他鹵素離子架橋之等結構錯合物,藉由更改金屬鹽或是多加入鹵素鹽類,但最終得到的皆是單核結構錯合物1-3及1-4,這部分僅針對錯合物1-2去作進行交流磁化率之量測,以鑑定其是否具有單分子磁鐵之性質,最後得到的位能障壁值只有2K。 第二部分則是多加入過渡金屬進行養晶,利用配位基tmeda-hb和tmeda-hi合出錯合物2-1~2-5,最終並未合出3d-4f錯合物,不過錯合物2-4經由X-ray單晶繞射鑑定後,為三維的金屬有機骨架材料構型,因此特別針對錯合物2-4作等溫氮氣吸脫附性質的測量,其孔洞之比表面積經由B.E.T.理論計算達到323.2 m2/g。
URI: http://hdl.handle.net/11455/96267
文章公開時間: 2019-07-30
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