雙金屬無機液晶之合成與探討; The studies of metallomesogens

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/5885

Title:	雙金屬無機液晶之合成與探討;The studies of metallomesogens
Authors:	盧建伸;Chien-Shen Lu
Contributors:	化學研究所
Keywords:	液晶;liquid crystal
Date:	2002-06-27
Issue Date:	2009-09-22 10:09:33 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	中文摘要本篇文章主要是探討系列一含雙金屬中心之無機液晶材料設計與物性，分子設計中藉由改變兩邊側鏈柔軟支鏈之碳鏈長度，來製備含雙銅之錯合物。進而來探討其對液晶形成所產生之影響。實驗藉由1H及13C-NMR鑑定合成化合物之結構及純度，並由元素分析確定錯合物之純度。液晶相形成之探討部分則藉由偏光顯微鏡下對不同相溫度變化範圍及液晶相結構種類作一初步觀察。再以熱差掃描卡計( different scanning calorimetry )及變溫粉末繞射儀(temperature-dependent X-ray diffraction )對相變化溫度及熱含量變化作判定及液晶相結構種類作確認。此系列合成出配位基3-hydroxy-4-(((2-hydroxy-3,4,5-trialkoxyphenyl)imino)methyl)phenyl-4-alkoxybenzoates，與其Cu金屬錯合物。錯合物側鏈基之alkoxy group碳數n=10、12、14、16，具有Colhd之雙金屬無機液晶材料分子。系列二經由不斷的嘗試，最終合成出配位基1,3-dihexadecyl-2- heptadecyl-1H-benzoimodazole與金屬Pd配位，形成液晶相。此系列合成出錯合物碳數n=12, 16，具有SmA之單金屬無機液晶材料分子。 Abstract Anew type of bicopper complexes of 3-hydrojy-4-{[(2-hydroxy- 3,4,5- trialkoxy-phenyl)imino]methyl}phenyl-4-alkoxybenzoates was prepared and characterized. The meso morphic properties of these copper complexes were studied by differential scanning calorimetry, polarized optical microscope and powder x-ray diffraction. These bimetallic compounds have two copper centers as core group and have totally eight alkoxy sidechains appended around the central core. The mesomorphic behavior exhibited was found to be dependent on the sidechain density. All derivatives of copper(II) compounds exhibited columnar mesophases over a wide range of temperatures. The mesophase was identified as hexagonal columnar (Colhd) phase based on the optical texture and also confirmed by powder XRD diffraction.
Appears in Collections:	[Graduate Institute of Chemistry] Electronic Thesis & Dissertation

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