[Interaction of cucurbit[ n ]urils and quinoline or its derivatives].
The structures and fluorescence characteristics of cucurbit[n = 6-8]urils with quinoline, isoquinoline and 7-methyl quinoline have been investigated by fluorescence spectrophotometry. Compared to NMR techniques, thefluorometric analysis methodrevealed that there are not only obvious interactions of quinoline or its derivates and cucurbit[7]uril, but also interactions of quinoline or its derivates and cucurbit[6]uril or cucurbit[8]uril which can not be observed by using 1H NMR technique. The experimental results also revealed that quinoline, isoquinoline and 7-methyl quinoline were included by cucurbit[6-8]uril with different ratios. There could be three kinds of interactions of cucurbit[n]urils and the guests: (a) cavity interaction, including hydrophobic forces and Van der Waals contact forces between macrocycles and cages; (b) portals ion-dipole interaction, or electrostatic interaction of the positive charge of the guests and the carbonyl groups at the portals of cucurbit[n]uril; (c) size interaction which requires the size of the guest matching a cucurbit[n]uril.
Du
Ying
Y
Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China.
Xue
Sai-feng
SF
Mu
Lan
L
Zhu
Qian-jiang
QJ
Tao
Zhu
Z
Zhang
Jian-xin
JX
D001952:Bridged-Ring Compounds / Q000737:chemistry*; D005453:Fluorescence; D007093:Imidazoles / Q000737:chemistry*; D007546:Isoquinolines / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D015394:Molecular Structure; D011804:Quinolines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils
D001952:Bridged-Ring Compounds; D007093:Imidazoles; D007546:Isoquinolines; D011804:Quinolines; C456276:cucurbit(7)uril; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils; C507198:cucurbit(8)uril; C454805:cucurbit(6)uril; C037219:quinoline; C039109:isoquinoline