Inclusion Complexing Behavior of Cucurbit[n] urils with Some Quinoline Derivatives

Abstract

Abstract: The interaction of cucurbit[n=6,7,8]urils(Q[6],Q[7],Q[8]) with some quinoline derivatives,such as 2-phenylquinoline,N-propylquinoline,3-aminoquinoline and 7,8-phenylquinoline,were studied by using ¹H NMR technique and fluorometric analysis.The experimental results of both methods reveal that 2-phenylquinoline can form stable inclusion complex with Q[6],Q[7],Q[8] with a ratio of 1∶1,1∶1 and 2∶1 respectively,and the inclusion constants of 2-phenylquinoline-Q[6] or Q[7] was 1.6×10⁴ and 3.2×10³ L/mol respectively.¹H NMR results also show that Q[6],Q[7],Q[8] could form inclusion complex with N-propylquinoline with a ratio of 2∶1 repectively,and Q[7] could form inclusion complex with 7,8-phenylquinoline with a ratio of 1∶1.Fluorometric analysis reveal that the host-guest complexes of Q[8] and the title quinoline derivatives were formed with a ratio of 1∶2 repectively,and the fluorescence of the interacted quinoline derivatives was queched by Q[8].Also the interaction models were suggested for the above hous-guest inclusion complexes.

Key words: Cucurbit[n]uril, Quinoline derivative, Inclusion complexes, ¹H NMR technique, Fluorometric analysis

CLC Number:

O621.15

TrendMD:

MOU Lan, XUE Sai-Feng, ZHU Qian-Jiang, TAO Zhu, ZENG Xi . Inclusion Complexing Behavior of Cucurbit[n] urils with Some Quinoline Derivatives[J]. Chem. J. Chinese Universities, 2005, 26(10): 1835.

References

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