Study on a carbosilane liquid crystalline (LC) dendrimer of the first generation - Containing twelve 4-butoxyazobenzene mesogenic groups in periphery
文献类型：期刊论文
| 作者 | Zhang QZ ; Liu JQ ; Yin XY ; Zhang JZ ; Zhao XG ; Li G ; Ji YP |
| 刊名 | acta chimica sinica
 |
| 出版日期 | 2002 |
| 卷号 | 60期号:12页码:2232-2237 |
| 关键词 | SCHLIEREN TEXTURE POLYMER |
| ISSN号 | 0567-7351 |
| 通讯作者 | zhang qz |
| 中文摘要 | the divergent synthesis of a new carbosilane liquid-crystalline (lc) dendrimer of the first generation (d1) is described. twelve 4-butoxyazobenzene groups are used as mesogenic fragments and attached in the periphery of the molecule. structure and properties of d1 were characterized by element analysis, h-1 nmr, maldi-tof-ms, ir, uv-vis, polarizing optical micrograph, dsc and waxd. it is argued that mesophase of nematic type is realized. it is shown that the mesophase type of the dendrimer essentially depends on the chemical nature of the mesogenic groups. phase behavior of d1 is k82n1331132n67k. the melting point of d1 is 30similar to43 degreesc lower than that of m5, its clearing temperature is 9 similar to 11 degreesc higher than that of m5 and its mesophase region is enlarged by 39 similar to 54 degreesc compared to that of m5. eight extinguished brushes emanating from a stationary point are observed, corresponding to the high-strength disclination of s = + 2 of dendrimer. the clearing enthalpy of d1 is smaller than the value that is commonly found for phase transition n-i in lc and lc polymers. this may be due to the presence of branched dendrimer cores which cannot be easily deformed to fit into the anisotropic lc phase structure. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 中文 |
| WOS记录号 | WOS:000179969400026 |
| 公开日期 | 2010-11-03 |
| 源URL | [http://202.98.16.49/handle/322003/18143]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang QZ,Liu JQ,Yin XY,et al. Study on a carbosilane liquid crystalline (LC) dendrimer of the first generation - Containing twelve 4-butoxyazobenzene mesogenic groups in periphery[J]. acta chimica sinica,2002,60(12):2232-2237. |
| APA | Zhang QZ.,Liu JQ.,Yin XY.,Zhang JZ.,Zhao XG.,...&Ji YP.(2002).Study on a carbosilane liquid crystalline (LC) dendrimer of the first generation - Containing twelve 4-butoxyazobenzene mesogenic groups in periphery.acta chimica sinica,60(12),2232-2237. |
| MLA | Zhang QZ,et al."Study on a carbosilane liquid crystalline (LC) dendrimer of the first generation - Containing twelve 4-butoxyazobenzene mesogenic groups in periphery".acta chimica sinica 60.12(2002):2232-2237. |
入库方式： OAI收割
来源：长春应用化学研究所
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