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Change in aggregation state of a porphyrin-perylene-diimide dyad induced by trifluoroacetic acid

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  • Materials Chemistry
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Chinese Science Bulletin

Abstract

The molecular aggregation state of a porphyrin-perylenediimide dyad can be changed by treating with trifluoroacetic acid. Transmittance electron microscopy (TEM) images revealed that lamella microstructures were formed when the dyad precipitated from neutral solvent, but spherical nano-particles were obtained when precipitating from acidic solution. X-ray diffraction patterns showed that the lamella microstructures and the nanoparticles were polycrystalline and amorphous solids, respectively. By using rational perylenediimide and porphyrin as reference compounds, careful analyses on the UV-visible spectra of the dyad and the references under different conditions were conducted and the results demonstrated that both the porphyrin and perylendiimide subunits of the dyad took J-aggregation in neutral solvent, but after being treated with trifluoroacetic acid and chloroform solution, the perylenediimide subunit changed to an H-aggregation while the porphyrin subunits changed to a random packing mode.

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Authors and Affiliations

  1. Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou, 310027, China

    Xie BoYu, Cao YaFeng, Sun JingZhi & Wang Mang

  2. College of Materials Science & Engineering, Hunan University, Changsha, 410082, China

    Yang XinGuo

Authors
  1. Xie BoYu
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  2. Cao YaFeng
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  3. Sun JingZhi
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  4. Yang XinGuo
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  5. Wang Mang
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Corresponding author

Correspondence to Sun JingZhi.

Additional information

Supported by the National Natural Science Foundation of China (Grant Nos. 50573065 and 50573019) and the Natural Science Foundation of Zhejiang Province of China (Grant No. Z406018)

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Xie, B., Cao, Y., Sun, J. et al. Change in aggregation state of a porphyrin-perylene-diimide dyad induced by trifluoroacetic acid. Chin. Sci. Bull. 53, 209–214 (2008). https://doi.org/10.1007/s11434-007-0496-2

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  • DOI: https://doi.org/10.1007/s11434-007-0496-2

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