排序方式: 共有22条查询结果,搜索用时 125 毫秒
1.
2.
3.
4.
5.
合成了一种18-冠-6修饰的苝酰亚胺衍生物(1), 研究了其作为主体对金属离子与阴离子的选择性识别行为. 结果表明, 主体1对Ba2+离子具有一定的选择性响应, 并可以通过Ba2+调控主体1的堆积行为; 主体1还对F-离子有选择性响应, F-与苝酰亚胺单元之间发生了阴离子-π相互作用. 相似文献
6.
简要阐述了分子器件和分子机器的相关概念,按照调控方式分类综述了基于24冠8的准轮烷、轮烷和索烃大环化合物构筑的分子器件和分子机器等在超分子领域的研究进展并对研究前景作了展望. 相似文献
7.
本文通过Click化学反应合成了一种含喹啉基和三唑基的开链冠醚, 考察和比较了主体化合物对镉等金属离子的荧光传感和选择性键合行为, 并通过荧光和核磁等手段研究了溶剂对其荧光传感的影响. 相似文献
8.
Three selena-crown-4 derivatives have been prepared and their cation binding abilities and selectivities with alkali and heavy metal ions have been evaluated by solvent extraction of aqueous metal picrates to show the highest Ag extractability for novel benzo-selena-14-crown-4 (2,3-benzo-7,12-diselena-1, 4-dioxacyclotetradecane-2-ene) over any other crown ethers. 相似文献
9.
Two calix[4]arene isomers with benzaldehyde moieties, i.e., 5,11,17,23-tetra-tert-butyl-25,27-bis[2-(o-formyl-phenoxy)ethoxy]-26,28-dihydroxycalix[4]arene (3) and 5,11,17,23-tetra-tert-butyl-25,27-bis[2-(p-formylphenoxy)-ethoxy]-26,28-dihydroxycalix[4]arene (4), were synthesized according to a newly designed route in high yields, and their crystal structures have been determined by X-ray crystallographic study. The photophysical behavior on complexation of calix[4]arene derivatives 3 and 4 with terbium(Ⅲ) nitrate was investigated in anhydrous acetonitrile at 25℃ by UV-Vis and fluorescence spectroscopies. The crystallographic structure of 3 indicated that the eight oxygen atoms formed a preorganized ionophoric cavity due to intramolecular π-π stacking, which could encapsulate lanthanide ions tightly. In sharp contrast, the compound 4 formed a linear array by intermolecular π-π stacking, hence the oxygen atoms of pendant arms could not coordinate with metal ions, giving a poor binding ability to Tb^3 . The absorption spectra of 3 with Tb^3 showed clearly a new broad intense absorption at 385nm. Interestingly, the narrow emission line spectrum has also been observed for compound 3 with Tb^3 , and the results obtained were discussed from the viewpoint of energy transfer mechanism between host structures and the properties of lanthanide ions. 相似文献
10.
冠醚的分子设计及其识别性质研究进展 总被引:10,自引:0,他引:10
综述了冠醚化学研究的最新进展:包括低对称冠醚、臂式冠醚、双冠醚等的分 子设计和离子键合、离子识别的热力学起源和分子组装的研究进展。 相似文献