Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (20): 2111-2118. Previous Articles     Next Articles

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  1. (1四川大学化学学院 成都 610064)
    (2四川大学分析测试中心 成都 610064)
    (3耶鲁大学化学系 康奈迪克州纽黑文市 06522)
  • 投稿日期:2009-11-19 修回日期:2010-03-16 发布日期:2010-05-06
  • 通讯作者: 殷勤俭

Study on the Aggregation Morphology of Side-Chain Azocomplex Synthesized by Ionic Self-Assembly

Sha Jing1 Lin Kunhua1 Zhao Yongchao1 Liu Ming2 Jiang Bo1 Xiao Dequan*,3 Yin Qinjian*,1   

  1. (1 College of Chemistry, Sichuan University, Chengdu 610064)
    (2 Analysis and Testing Center, Sichuan University, Chengdu 610064)
    (3 Department of Chemistry, Yale University, New Have, CT 06522)
  • Received:2009-11-19 Revised:2010-03-16 Published:2010-05-06
  • Contact: YIN Qin-Jian

A random copolymer poly(4-vinylpyridine-co-acrylonitrle) (designated as P4VP-r-AN) was synthesized by solution polymerization, and characterized by the average viscosity molecular weight measurement, along with 1H NMR, 13C NMR, DSC, and FTIR spectroscopy. The viscosity-average molecular weight of the P4VP-r-AN is 1.06×104 g/mol, and the mass content of P4VP is about 87.1%. A new method based on ionic self-assembly technology was provided for design of side chain azocomplex (P4VP-r-AN/MY) from the protonated P4VP-r-AN (P4VP-r-AN) and azobenzene dye metanil yellow (MY) in aqueous solution. The self-assembly behaviors and morphologies of P4VP-r-AN/MY were investigated by means of 1H NMR, FTIR, DSC, UV-vis, SEM, TEM and High-resolution transmission electron microscopes and X-ray energy dispersion spectrometer (HRTEM&EDS). It was found that azobenzene complex P4VP-r-AN/MY could be self-assembled and aggregated in aqueous solution, and the aggregations shown to be solid polymeric nanospheres on the sizes of 10~200 nm in diameters. The molar ratio of MY and P4VP-r-AN in P4VP-r-AN/MY was measured at about 0.575. HRTEM&EDS were used to study the morphology and composition of the organic nanospheres. The EDS elemental analysis indicated that the spherical organic nanoparticles are indeed composed of MY dye molecules.

Key words: ionic self-assembly, polyelectrolyte, metanil yellow, azocomplex, spherical nano-aggregation