合成了外围含4-丁氧基偶氮苯介晶基元的三代硅碳烷液晶树状物PCSi-3G-C4.以4-[4-(6-羟基已氧基)苯基]丁氧基偶氮苯介晶基团对端基官能团为Si-Cl的三代硅碳烷树状物PCSi-3G-Cl脚手架进行功能化,并利用元素分析、红外光谱(IR)、核磁共振(NMR)、偏光显微镜(POM)、差示扫描量热法(DSC)对其结构与液晶性进行表征.结果表明,与对应的液晶基元相似PCSi-3G-C4显示向列相,但二者在熔点、清亮点和液晶态温区等方面存在一定差异.
Liquid crystalline dendrimer of the third generation PCSi-3G-C4, with 4-butoxyazobenzene mesogenic groups on the periphery has been prepared. A terminal Si-Cl functional carbosilane dendrimer of the third generation PCSi-3G-Cl based on pentaerythritol was used as dendritic scaffold and was subsequently functionalized with 4-[4-(6-hydroxyhexyloxy)phenylazo]butoxybenzene groups (M-C4). Investigation of the liquid crystalline properties by polarized optical microscopy (POM) and differential scanning calorimetry (DSC) showed that, similar to the corresponding mesogenic moiety, the mesogen-functionalized dendrimer exhibits nematic phase.
参考文献
| [1] | Tsiourvas D;Felekis T;Sideratou Z et al.[J].Macromolecules,2002,35:6466-6469. |
| [2] | Mammen M;Choi S K;Whitesides G M .[J].Angewandte Chemie International Edition,1998,37:2774-2794. |
| [3] | Ponomarenko S A;Rebrov E A;Bobrovsky A et al.[J].Liquid Crystals,1996,21:1-12. |
| [4] | Ponomarenko SA.;Shibaev VP.;Richardson RM.;Whitehouse IJ. Rebrov EA.;Muzafarov AM.;Boiko NI. .Carbosilane liquid crystalline dendrimers: From molecular architecture to supramolecular nanostructures[J].Macromolecules,2000(15):5549-5558. |
| [5] | Lorenz K;Holter D;Stuhn B et al.[J].Advanced Materials,1996,8:414. |
| [6] | Coen M C;Lorenz K;Kressler J et al.[J].Macromolecules,1996,29:8069-8076. |
| [7] | Terunuma D.;Nishio R.;Matsuoka K.;Kuzuhara H.;Aoki Y.;Nohira H.;Kato T. .Preparation of new carbosilane dendrimers carrying mesogenic groups[J].Chemistry Letters,1998(1):59-60. |
| [8] | Terunuma D.;Aoki Y.;Nohira H.;Matsuoka K.;Kuzuhara H.;Nishio R. .Preparation and characterization of carbosilane dendrimers carrying mesogens with chiral substituent[J].Chemistry Letters,1999(7):565-566. |
| [9] | 唐新德,张其震,范星河,周其凤.Synthesis of Novel Carbosilane Dendrimers Based on Pentaerythritol[J].中国化学（英文版）,2004(11):1366-1371. |
| [10] | Xin De TANG,Qi Zhen ZHANG,Qi Feng ZHOU.Pentaerythritol-based Carbosilane Dendrimers[J].中国化学快报（英文版）,2005(03):296-298. |
| [11] | 唐新德,张其震,李爱香,范星河,陈小芳,周其凤.A Novel Pentaerythritol-based Carbosilane Liquid Crystalline Dendrimer Containing 12 Nitroazobenzene Groups on the Periphery[J].中国化学(英文版),2004(09):1034-1038. |
| [12] | Yonetake K;Masuko T;Morishita T et al.[J].Macromolecules,1999,32:6578-6586. |
| [13] | Buason P;Ihre H;Hult A .[J].Journal of the American Chemical Society,1998,120:9070-9071. |
| [14] | Percec V.;Ungar G.;Zhou JP.;Chu PW. .RATIONAL DESIGN OF THE FIRST NONSPHERICAL DENDRIMER WHICH DISPLAYS CALAMITIC NEMATIC AND SMECTIC THERMOTROPIC LIQUID CRYSTALLINE PHASES[J].Journal of the American Chemical Society,1995(46):11441-11454. |
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