一代树状碳硅烷液晶研究--端基含12个4-硝基偶氮苯介晶基元 |
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引用本文: | 张其震,盛昕,殷晓颖,季怡萍,李光,赵晓光. 一代树状碳硅烷液晶研究--端基含12个4-硝基偶氮苯介晶基元[J]. 化学学报, 2003, 61(9): 1478-1483 |
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作者姓名: | 张其震 盛昕 殷晓颖 季怡萍 李光 赵晓光 |
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作者单位: | 山东大学化学化工学院,济南,250100;中国科学院长春应用化学研究所,长春,130022 |
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基金项目: | 国家自然科学基金(Nos.29874020,59573029)、山东省自然科学基金(No.Y95B0720)和中国科学院高分子物理重点实验室基金(中国科学院长春应用化学研究所Nos.R149833C,R159633Q,R159833C)资助项目. |
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摘 要: | 用发散法合成了以四碳硅烷为核心,周边含12个4-硝基偶氮苯介晶基元(M5) 端基的新的一代树状碳硅烷(D1)液晶,并用元素分析、核磁共振、基质辅助激光 解吸离子化飞行时间质谱(MALDI-TOF-MS)、红外、紫外、偏光显微镜、差示扫描 量热(DSC)和X射线衍射法(WAXD)表征。介晶基元化合物(M5)显示向列相,树 状物D1显示胆甾相和S_E相。D1的液晶相相行为是K70Ch188I185Ch58S_E-48K。
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关 键 词: | SE相液晶 胆甾相液晶 一代树状化合物 4-硝基偶氮苯 碳硅烷 |
修稿时间: | 2003-01-10 |
Study on a Carbosilane Liquid Crystalline Dendrimer of the First Generation-Containing Twelve 4-Nitroazobenzene Mesogen in Its Periphery |
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Affiliation: | School of Chemistry and Chemical Engineering, Shandong University;Changchun Institute of Applied Chemistry, Chinese Academy of Sciences |
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Abstract: | The divergent synthesis of a new carbosilane liquid crystalline (LC) dendrimer of the first generation (D1) is described. Twelve 4-nitroazobenzene are used as mesogenic fragments and attached in its periphery and fourcarbosilane as core. Structure and properties of D1 were characterized by elemental analysis, 1H NMR, MALDI-TOF-MS, IR, UV-vis, polarizing optical micrograph, DSC and WAXD. Mesogenic compound M5 exhibits nematic and dendrimer D1 reveals cholesteryl and smectic E liquid crystalline state. Phase behavior of D1 in LC state is K70Ch188~I185Ch58S_E48K. |
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Keywords: | smectic E liquid crystal cholesteryl liquid crystal dendrimer of the first generation 4-nitroazobenzene carbosilane |
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