含金屬無機液晶之設計與合成; The studies of metallomesogens

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题名:	含金屬無機液晶之設計與合成;The studies of metallomesogens
作者:	邱哲夫;Che-Fu Chiu
贡献者:	化學研究所
关键词:	液晶;metallomesogens
日期:	2002-06-27
上传时间:	2009-09-22 10:09:20 (UTC+8)
出版者:	國立中央大學圖書館
摘要:	中文摘要本篇論文以合成設計不同結構形式之配位基及其金屬錯合物；如系列一：bis(4-alkoxy-4?-stilbazole-N-oxdies)copper（Ⅱ）dichlorides；系列二：〔2,6-pyridinedicarboxaldehydebis(p-dodecyloxyphenylimine)〕zinc（Ⅱ）chloride（A）與〔2,6-pyridinedicarboxaldehydebis(3,4- didodecyloxyphenylimine)〕zinc（Ⅱ）chloride（B）。所有化合物皆經IR，NMR與元素分析鑑定其結構之正確性。並藉由熱示差掃瞄分析儀（differential scanning calorimetry），偏光顯微鏡（polarizing optical microscopy）與變溫粉末繞射儀（temperature-dependent X-ray diffraction）鑑定錯合物中間相變化溫度及其液晶性質。本篇論文成功的合成-系列一bis(4-alkoxy-4，-stilbazole-N-oxides) copper（Ⅱ）dichlorides，此錯合物製備上是利用4-alkoxy-4，-stilbazole-N-oxides與CuCl2進而錯合配位形成二價四配位含金屬之幾何分子結構。實驗顯示當錯合物側鏈基之alkoxy group碳數n為10、12、14、16均為SmA相。其中碳數為12是其液晶相溫度範圍最廣。系列二Schiff base形式之〔2,6-Pyridinedicarboxaldehydebis(p- dodecyloxyphenylimine)〕zinc（Ⅱ）chloride（A）與〔2,6-Pyridine dicarboxaldehydebis(3,4-didodecyloxyphenylimine)〕zinc（Ⅱ）chloride（B）為結晶相。但當金屬為NiCl2時錯合物具有液晶相，其碳數n為10、12不具液晶相，而碳數n為14、16為Colh相。 Abstract The metallomesogens is a new area in the field of liquid crystals. Recently, multimetallic mesogen is a investigative target for chemists. So we were synthesized the series of bis〔4-alkoxy-4?-stilbazole-N-oxdies〕copper (Ⅱ) dichlorides. Infrared, 1H and 13C spectra were used to identify the structures and purities, and the metal complexes were characterized by the melting point and element analysis (EA). Their phase transition temperatures and mesogenic behaviors were investigated through the differential scanning calorimetry (DSC), polarizing optical microscope (POM), and temperature dependent power X-ray diffraction (PXRD). Previously, the trans-4-alkoxy-4?-stilbazole-N-oxdie (CnNO) showed SmA mesophase was reported. At present, the complexes bis〔4-alkoxy-4?-stilbazole-N-oxdies〕copper (Ⅱ) dichlorides (CnNO-CuCl2) also show SmA mesophase. The carbon length of the side chain from n=10~16 are the liquid crystals. When the carbon length (n=12) that has the broadest range of the temperature. From DSC and EA data identified that liquid crystals structure had bimetallomesogens. The experimental data of PXRD proved that the series of complexes are rod-like liquid crystals.
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