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    Title: 腙基聯吡啶架構之鈷、鎳、銅、鋅錯合物液晶
    Other Titles: Liquid crystals of cobalt, nickel, copper and zinc complexes derived from dihydrazone-bipyridine moiety
    Authors: 范文蕙;Fan, Wen-hui
    Contributors: 淡江大學化學學系碩士班
    王文竹;Wang, Wen-jwu
    Keywords: 液晶;liquid crystals
    Date: 2006
    Issue Date: 2010-01-11 02:43:53 (UTC+8)
    Abstract: 本篇文章主要探討以腙基聯吡啶為基本架構,側邊接上以醛基為官能基之不同碳鏈數目的衍生物,合成出具有配位能力的配位子分別為(L1-Cn~L3-Cn),在加入鈷、鎳、銅、鋅等不同的金屬鹽類形成錯合物。
    利用核磁共振光譜(NMR)對結構做初步的鑑定,再以質譜(Mass)及元素分析(EA)來探討化合物的結構及純度,同時也得到具有五配位的[Zn(L1-C2)Cl2]單晶結構。液晶相探討部分,以偏光顯微鏡(POM)對不同相之溫度變化及液晶相種類做初步觀察,再以熱插式掃描分析儀(DSC)測量相變化溫度及熱焓值變化,最後以x-ray粉末繞射儀(XRD)來鑑定液晶相的排列,得知錯合物[Co(L2-Cn)Cl2]、[Ni(L2-Cn)Cl2]、[Zn(L2-Cn)Cl2]的系列屬於盤型(discotic)的液晶相。在電子吸收光譜中,配位子在波長340 nm有π-π*的電子躍遷,錯合物大約在波長400-420 nm間有CT band的表現;另外在[Zn(L1-Cn)Cl2]和[Zn(L1-Cn)Cl2]系列中,分別在波長530 nm及545 nm有放光的表現。
    The synthesis of new metal complexes based on hydrazones derived from 6,6’-dihydrazine- 2,2’-bipyridine has been carried out, and use different lengths of alkyl chains to modify the ligands (L1-Cn~L3-Cn). The complexes were prepared by adding the metal salts included of cobalt, nickel, copper and zinc.
    The molecular structure and purity of these novel compounds have been verified by NMR, ESI-Mass, elemental analysis, and the single crystal of [Zn(L1-C2)Cl2] were also obtained. The phase behavior and mesogenic properties of these compounds were determined by polarizing optical microscopy (POM), differential scanning calorimetry (DSC) and powder x-ray diffraction techniques. [Co(L2-Cn)Cl2]、[Ni(L2-Cn)Cl2]、[Zn(L2-Cn)Cl2] complexes exhibit discotic mesophase. The π-π* transition of these ligands occurred at 340 nm, and the charge transfer band of complexes were observed at ca. 400-420 nm in the absorption spectra. The fluorescent properties of [Zn(L1-Cn)Cl2] and [Zn(L2-Cn)Cl2] series were examined at 530 nm and 545 nm.
    Appears in Collections:[化學學系暨研究所] 學位論文

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