THERMODYNAMIC STUDY OF THE PHASE TRANSITIONS OF THE MESOGEN H(P)BAB AND THE HOMOLOGOUS TREND OF THE MELTING ENTROPIES
文献类型：期刊论文
| 作者 | Wang Bangning; Tan Fu |
| 刊名 | ACTA PHYSICO-CHIMICA SINICA
 |
| 出版日期 | 1989 |
| 卷号 | 5期号:1页码:62-66 |
| ISSN号 | 1000-6818 |
| DOI | 10.3866/PKU.WHXB19890113 |
| 英文摘要 | The phase transitions of N-(p-n-heptyloxybenzylidene)-p'-aminobenzonitrile (H(P)BAB) were studied at various rates within the range 260-380K by DSC. It was revealed by the DSC experiments that the thermotropic nematogen H(P)BAB obtained by the repeated recrystallization from absolute ethanol was the glassy crystal at room temperature in addition to the known, stable and metastable crystal modifications K(I) and K(II). This is the first example of glassy crystal among the meaogens in so far as author's knowledge. The temperature and the heat capacity step of the glass transition of H(P)BAB are 327.05 +/- 0.41 K and 310 +/- 27J K-1 mol(-1), respectively. On the basis of the present author's results and the reliable literature data, the linear relations of the melting entropies with the numbers of carbon atoms in the flexible terminal alkyl groups are presented in the homologues of N-(p-n-alkyloxybenzylidene)-p'-aminonitriles. Improved the Aranow's statistical approach, the slopes of the linear relations have been estimated and are equal to Rin(3/g)(1< <3). |
| 语种 | 英语 |
| 出版者 | PEKING UNIV PRESS |
| WOS记录号 | WOS:000207572000013 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/74023]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wang Bangning |
| 作者单位 | Acad Sinica, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Bangning,Tan Fu. THERMODYNAMIC STUDY OF THE PHASE TRANSITIONS OF THE MESOGEN H(P)BAB AND THE HOMOLOGOUS TREND OF THE MELTING ENTROPIES[J]. ACTA PHYSICO-CHIMICA SINICA,1989,5(1):62-66. |
| APA | Wang Bangning,&Tan Fu.(1989).THERMODYNAMIC STUDY OF THE PHASE TRANSITIONS OF THE MESOGEN H(P)BAB AND THE HOMOLOGOUS TREND OF THE MELTING ENTROPIES.ACTA PHYSICO-CHIMICA SINICA,5(1),62-66. |
| MLA | Wang Bangning,et al."THERMODYNAMIC STUDY OF THE PHASE TRANSITIONS OF THE MESOGEN H(P)BAB AND THE HOMOLOGOUS TREND OF THE MELTING ENTROPIES".ACTA PHYSICO-CHIMICA SINICA 5.1(1989):62-66. |
入库方式： OAI收割
来源：化学研究所
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