Host–guest interaction of nitroxide radicals with water-soluble pillar[6]arenes
作者:Xue Wang、Kaiyun Ji、Antal Rockenbauer、Yangping Liu、Yuguang Song
DOI:10.1039/d0ob00341g
日期:——
pillar[n]arenes was studied for the first time by electronparamagneticresonancespectroscopy and NMR spectroscopy. Our results showed that this interaction strongly depended on the 4-substituents of nitroxides and the cavity size of pillar[n]arenes. The host–guest interaction with water-soluble pillar[6]arene WP6 effectively increased the thermodynamic and kinetic stability of nitroxide radical 4-AT toward
首次通过电子顺磁共振波谱和核磁共振波谱研究了氮氧自由基与水溶性支柱[ n ]芳烃的主客相互作用。我们的结果表明,这种相互作用在很大程度上取决于氮氧化物的4个取代基和支柱[ n ]芳烃的腔尺寸。主客体与水溶性柱[6]芳烃WP6的相互作用有效地提高了氮氧自由基4-AT对抗坏血酸的热力学和动力学稳定性,从而扩展了其潜在的生物医学应用。
Dual Photo- and pH-Responsive Supramolecular Nanocarriers Based on Water-Soluble Pillar[6]arene and Different Azobenzene Derivatives for Intracellular Anticancer Drug Delivery
作者:Xiao-Yu Hu、Keke Jia、Yu Cao、Yan Li、Shan Qin、Fan Zhou、Chen Lin、Dongmei Zhang、Leyong Wang
DOI:10.1002/chem.201405095
日期:2015.1.12
Two novel types of supramolecular nanocarriers fabricated by the amphiphilic host–guest inclusion complex formed from water‐solublepillar[6]arene (WP6) and azobenzene derivatives G1 or G2 have been developed, in which G1 is structurally similar to G2 but has an extra phenoxy group in its hydrophobic region. Supramolecularmicelles can be initially formed by WP6 with G1, which gradually transform into
liquid-to-solid and solid-to-structural liquid state changes. We observed that a macrocyclic compound, a pillar[6]arene derivative bearing 12 n-hexyl substituents, is a room temperature structural liquid with unique properties. Formation of a host-guest complex between the pillar[6]arene cavity and the n-hexyl substituent results in a structural liquid with nanoscale structural heterogeneities. The structural
A water-soluble pillar[6]arene functions as a solubilizing agent to enhance the solubility and bioactivity of poorly water-soluble anticancer drug tamoxifen.