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Citation: HUANG Zhiwen, LIN Youwen, LI Guangwen. Synthesis,Characterization of Pyridylimidazo [4,5-f]1,10-phenanthroline Derivates and Their Spectroscopic Study after Interacted with Cucurbit [n] urils[J]. Chinese Journal of Applied Chemistry, ;2011, 28(4): 464-470. doi: 10.3724/SP.J.1095.2011.00340 shu

Synthesis,Characterization of Pyridylimidazo [4,5-f]1,10-phenanthroline Derivates and Their Spectroscopic Study after Interacted with Cucurbit [n] urils

1.
College of Pharmacy, Fujian Medical University, Fuzhou 350004

Corresponding author: LIN Youwen,
Received Date: 11 June 2010
Available Online: 20 September 2010
Fund Project: 福建医科大学教授学术发展基金计划(JS09004)资助项目 (JS09004)

Two pyridyl imidazo [4,5-f]1,10-phenanthroline derivates,namely 2-(3-pyridyl)-imidazo[4,5-f] 1,10-phenanthroline(G1) and 2-(4-pyridyl) imidazo [4,5-f]1,10-phenanthroline(G2),were synthesized and characterized by elemental analysis,¹H NMR and MS.Under various concentrations of cucurbit [n] urils(Q[n],n=6,7),the interaction of Q[n] with G1 and G2 were studied in buffer solutions with different pH values by using UV-Vis spectroscopy and fluorescence spectrophotometry.The results revealed that cucurbit [n] urils(n=6,7) form a 1:1 complex with G1,and Q[6] form a 1:1 complex with G2 in acidic solution,fluorescent sensitizing effects of both Q[6] and Q[7] toward guests were determined.Under acidic solution Q[7] formed a 2:1 complex with G2,and a fluorescent quenching effect of Q[7] on G2 was observed.Association constants(K) of Q[n](n=6,7) with G1 were found to be 3.00×10⁴ L/mol,1.86×10⁴ L/mol respectively,while those of Q[n](n=6,7) with G2 are 1.64×10⁴ L/mol and 1.01×10³ L/mol respectively.With decreasing acidity of the systems,the interaction between guests and Q[n](n=6,7) weakened and no interaction was observed under neutral conditions.
- phenanthroline derivates,
- synthesis,
- cucurbit [n] urils,
- Rost-guest inclusion reaction,
- spectroscopic method
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