Designer Ionic Liquid Crystals Based on Congruently Shaped Guanidinium Sulfonates
作者:Martin Butschies、Wolfgang Frey、Sabine Laschat
DOI:10.1002/chem.201101925
日期:2012.3.5
determine the influence of congruently shaped anions, in comparison with their spherical counterparts, on mesophase behaviour, which was investigated by differential scanning calorimetry (DSC), polarising optical microscopy (POM) and X‐ray diffraction (XRD). All the liquid crystalline salts exhibit smectic A mesophases with strongly interdigitated bilayer structures. The guanidinium sulfonate ion pairs
Columnar self-assembly of bowl shaped fluorescent liquid crystals based on calix[4]arene with Schiff base units
作者:Vinay S. Sharma、Anuj S. Sharma、Rajesh H. Vekariya
DOI:10.1039/c8nj01721b
日期:——
The structural and conformation characterization of these newly synthesised compounds was achieved by FT-IR, 1H NMR, and 13C NMR spectroscopy. All of the synthesised compounds exhibited good blue luminescence in solution under long wavelength UV light. To explore the structureproperty correlations, the alkoxy side chain group was varied from a lower alkyl spacer to a higher alkyl spacer on the lower
已合成并很好地表征了一个新的碗形分子家族,该杯形分子带有一个杯形[4] arene刚性核,并附加在四个侧面上,显示出广泛的六方柱状相。使用偏振光学显微镜(POM),差示扫描量热法(DSC)和高温粉末X射线衍射法(XRD)的组合来确定本发明化合物的热行为。发现所有合成材料均显示出对映六方柱状液晶相。这些新合成的化合物的结构和构象表征是通过FT-IR,1 H NMR和1313 C NMR光谱。所有合成的化合物在长波长紫外光下在溶液中均显示出良好的蓝色发光。为了探索结构性质的相关性,在杯[4]芳烃的下边缘,烷氧基侧链基团从低级烷基间隔基变为高级烷基间隔基。本研究表明,在下缘上引入具有正烷氧基侧基的连接基团是获得具有良好的热和光物理行为的超分子碗形液晶的有效方法。
Role of Terminal Heterocyclic Ring on Mesomorphic Properties of Homologous Series*
作者:B. T. Thaker、B. S. Patel、D. B. Solanki、Y. T. Dhimmer、J. S. Dave
DOI:10.1080/15421400903290501
日期:2010.2.25
new homologous series of compounds with a heterocyclicring having sulfur and oxygen as a hetero atom derived from p-hydroxy acetophenone and alkoxy aniline containing cinnamate-azomethine as central linkages have been synthesized. viz. 4(furalacryloxy) α-methyl benzylidine-4′-alkoxy aniline and 4(thianylacryloxy) α-methyl benzylidine-4′-alkoxy aniline. The compound of both the series have been characterized
Zn2+ cation triggers self-assembly of cyclen into a stable metallogel
作者:Tianmin Shu、Junchen Wu、Ying Zou、Keyin Liu、Liqing Chen、Tao Yi
DOI:10.1007/s11458-010-0109-5
日期:2010.6
A novel type of ligands contained 1,4,7,10-tetrazacyclododecane and functionalized by two azobenzene moieties grafted with two alkyl chains was designed and synthesized. The ligands with long alkyl chains can form metallogels in the presence of Zn2+ cations. The formation of metallogel was followed by NMR and electronic spectral detection. The morphology of the xerogels is varied with the equivalent of Zn2+ cations and the concentration of the gel. Spectral and structural analysis indicated that the driving forces of the gel formation were attributed to intermolecular hydrophobic interactions between alkyl chains and π-π interaction between azobenzenes.