期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Complexation of sym-bis(benzimidazole)-2,2'-ethylene salts with cucurbit[6]uril derivatives:A potential axle molecule for pseudorotaxanes 被引量:4
1
作者 Jun-Ming Yi Xin-Long Ni +4 位作者 Xin Xiao Li-Bing Lu Sai-Feng Xue qian-jiang zhu zhu Tao 《Chinese Chemical Letters》 SCIE CAS CSCD 2013年第5期362-366,共5页
Sym-bis(benzimidazole)-2,2'-ethylene cations act as a new axle template for threading cucurbit[6]uril derivatives on,forming[2]pseudorotaxane and[3]pseudorotaxane.These new complexes have been studied using 1 H NMR... Sym-bis(benzimidazole)-2,2'-ethylene cations act as a new axle template for threading cucurbit[6]uril derivatives on,forming[2]pseudorotaxane and[3]pseudorotaxane.These new complexes have been studied using 1 H NMR,UV-vis absorption spectroscopy and X-ray analysis.Changes in the 1 H NMR spectra indicate that the two types of pseudorotaxane can be formed by varying the host concentration. UV-vis absorption titration experiments at different pH values demonstrate that interesting pK_a shifts of the bis-benzimidazole derivatives can be induced by the host-guest complexation.The associated constants were calculated to be 2.81×10^4 L/mol and 9.06×10^6 L/mol for the[2]pseudorotaxanes and |3]pseudorotaxanes,respectively.Furthermore,X-ray diffraction studies of the solid state structures provide unequivocal proof of the host concentration dependent pseudorotaxane,which is strongly in line with the evidences in solution. 展开更多
关键词 uril derivatives Bis(benzimidazole) derivatives PSEUDOROTAXANE Crystal structure
原文传递
Q[8]/SC[6]A-based framework constructed via OSIQ for metal ion capture 被引量:1
2
作者 Li-Fei Tian Ming Liu +5 位作者 Li-Xia Chen Chao Huang qian-jiang zhu Kai Chen Jiang-Lin Zhao zhu Tao 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第3期1524-1528,共5页
Since the outer surface interaction of Q[n]s (OSIQ, including self-, anion- and aromatic-induced OSIQs) was proposed in 2014, it has become the most important research area in our group to construct various Q[n]-based... Since the outer surface interaction of Q[n]s (OSIQ, including self-, anion- and aromatic-induced OSIQs) was proposed in 2014, it has become the most important research area in our group to construct various Q[n]-based supramolecular frameworks via the OSIQ strategy. Herein, we report a novel supramolecular framework constructed using cucurbit[8]uril (Q[8]) and 4-sulfocalix[6]arene (SC[6]A). This Q[8]/SC[6]A-based supramolecular framework is a product via the perfect combination of self-, anion- and aromatic-induced OSIQs. This framework has the characteristics of easy preparation and high stability with the most important feature being the sequence selective capture of specific metal cations, such as common alkali- and alkaline earth metal ions, and renewability. Thus, this framework may be used in seawater desalination, potassium ion enrichment, radioactive cesium ion pollution source treatment, Gruinard's treatment or water softening and other applications. 展开更多
关键词 CUCURBIT[8]URIL arene Outer surface interaction of Q[n]s Supramolecular framework Metal ion capture
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部