pH-controlled complexation with paraquat G1 in water was investigated. Host WP7 and guest G1 formed a 1:1 [2]pseudorotaxane with a high association constant of (2.96 ± 0.31) × 109 M–1 in water. Furthermore, we took advantage of this novel molecular recognition motif to fabricate a supra-amphiphile based on WP7 and an amphiphilic paraquat derivative G2. The morphologies and sizes of self-assemblies of G2 and
Conversion from Pillar[5]arene to Pillar[6–15]arenes by Ring Expansion and Encapsulation of C<sub>60</sub> by Pillar[<i>n</i>]arenes with Nanosize Cavities
Conversion of ring size from pillar[5]arene to pillar[6–15]arenes and isolation of pillar[n]arene homologues (n = 11–13) with known pillar[n]arene homologues (n = 6–10) are demonstrated. Pillar[10]arene formed the most stable host–guest complex with C60 among the pillar[5–14]arenes.
将环的尺寸从支柱[5]芳烃转化为支柱[6-15]芳烃,并分离具有已知支柱[ n ]芳烃同系物(n = 6-10)的支柱[ n ] arene同系物(n = 11-13)演示。支柱[5-14]芳烃中,支柱[10]芳烃与C 60形成最稳定的主体-客体复合物。
Pillar[n]arenes (n = 8–10) with two cavities: synthesis, structures and complexing properties
作者:Xiao-Bo Hu、Zhenxia Chen、Lei Chen、Ling Zhang、Jun-Li Hou、Zhan-Ting Li
DOI:10.1039/c2cc36027f
日期:——
Three pillar[n]arenes (n = 8â10) were synthesized. X-ray analysis demonstrated that, different from early reported small pillar[n]arenes (n = 5, 6), these larger macrocycles gave rise to two cavities. 1H NMR and MS experiments revealed that pillar[9]arene complexed one n-octyltrimethyl ammonium in chloroform, while pillar[10]arene could complex two.
我们合成了三种支柱[n]烷(n = 8â10)。X 射线分析表明,与早期报道的小柱[n]烷(n = 5、6)不同,这些较大的大环产生了两个空腔。1H NMR 和 MS 实验表明,柱[9]炔在氯仿中能络合一个正辛基三甲基铵,而柱[10]炔则能络合两个。
Host–guest properties of pillar[7]arene towards substituted adamantane ammonium cations
作者:Jiazeng Fan、Yu Chen、Derong Cao、Ying-Wei Yang、Xueshun Jia、Chunju Li
DOI:10.1039/c3ra46505e
日期:——
Highly efficient complexation of per-ethylated pillar[7]arene towards 3,5-dimethyl-1-adamantyl ammonium cations is reported as the first example of pillar[7]arene-based molecular recognition. The binding affinity of the resulting inclusion complex is much higher than those for per-ethylated pillar[5,6]arenes with smaller cavities due to the strict size-fit effect.