A three dimensional framework induced by pi center dot center dot center dot pi stacking of 2,2 '(Alkylene-1,6-diyl)diisoquinolinium from Q[6]-based Pseudorotaxane

作者：Fan, Zhi-Fang; Xiao, Xin; Zhang, Yun-Qian; Xue, Sai-Feng^*; Zhu, Qian-Jiang; Tao, Zhu; Wei, Gang

来源：Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2011, 71(3-4): 577-581.

DOI：10.1007/s10847-011-9981-y

• Isoquinolinum derivatives
• Cucurbit[6]uril
• Pseudorotaxanes
• pi center dot center dot center dot pi stacking
• Framework

A bromide salt of 2,2'-(hexane-1,6-diyl) diisoquinolinium (K6) was designed, synthesized and introduced to construct a novel framework induced by pi center dot center dot center dot pi stacking of 2,2'-(alkylene-1,omega-diyl) diisoquinolinium from Q[6]-based pseudo-rotaxanes. The crystal structure of the compound revealed that the assembled framework based on the Q[6]-2,2'-(alkylene-1,6-diyl)diisoquinolinium pseudo-rotaxanes have stoichiometries of {(K6)@(Q[6])}(2+)center dot 2Br(-)center dot 7(H2O). The compound 1 has a novel three-dimensional framework constructed of two different channelsone containing stacked isoquinolyl moieties from the K6@Q[6] pseudorotaxanes and the other containing the bromide anions. H-1 NMR spectra analysis was performed and confirmed the pseudorotaxane interaction model in which the 2,2'-(alkylene-1,6-diyl)diisoquinolinium guest threads into the cavity of Q[6] with the alkyl chain included inside the cavity and the two end isoquinolyl moieties protruding from the two opening portals. Absorption spectrophotometric and fluorescence spectroscopic analyses of the host-guest inclusion complex in aqueous solution found that the complexes were most stable at a host: guest mole ratio of 1:1. At this ratio, the complex has binding constants (K) similar to 10(6).

• 出版日期2011-12
• 单位贵州大学; CSIRO; 六盘水师范学院