Unsymmetric 1,3,4-oxa(thia)diazoles of quinoxaline-naphthalene conjugates

NCU Institutional Repository > 理學院 > 化學學系 > 期刊論文 > Item 987654321/100809

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/100809

题名:	Unsymmetric 1,3,4-oxa(thia)diazoles of quinoxaline-naphthalene conjugates
作者:	賴重光;Lin, Kuan-Ting;Kuo, Hsiu-Ming;Sheu, Hwo-Shuenn;Lai, Chung K.
贡献者:	理學院化學學系
关键词:	1,3,4-Oxadiazoles;1,3,4-Thiadiazoles;chemical reactions;chemical structure;emissions;Hexagonal columnar phases;Liquid crystals;microscopy;naphthalene;Naphthalenes;photoluminescence;Quinoxalines;X-ray diffraction
日期:	2013-10-28
上传时间:	2026-04-21 14:15:00 (UTC+8)
出版者:	Elsevier Ltd.;Elsevier Ltd
摘要:	摘要： Two new series of unsymmetric 1,3,4-oxa(thia)diazoles 1a,b containing both quinoxaline and naphthalene moieties were prepared and their mesomorphic properties were investigated. The mesomorphic behavior of compounds 1a,b and 2 was studied by DSC analysis and polarized optical microscopy. All compounds 1a and 2 exhibited hexagonal columnar phases (Colh), which were also confirmed by powder XRD diffractometer. Ncell and Rar values equal to 5.23 and 22.73 Å2 within a slice of 9.0 Å thick were also obtained for 1a (n=16), indicating that a more disc-like structure constructed by two molecules lying side-by-side was correlated in Colh phases. In contrast, all compounds 1b were not mesogenic, and the lack of mesomorphic properties in 1b might be due to their unfavorable conformations. The PL spectra of all compounds 1a,b showed one intense peak at λmax=509–512 nm, and these photoluminescent emissions originated from quinoxaline moiety. [Display omitted] 出版者： Elsevier Ltd 出版日期： 2013-10-28 出處： Tetrahedron, 2013-10, Vol.69 (43), p.9045-9055 版權： 2013 Elsevier Ltd 識別號： ISSN: 0040-4020 識別號： EISSN: 1464-5416 識別號： DOI: 10.1016/j.tet.2013.08.031
显示于类别:	[化學學系] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	22	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....