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Revista de Chimie (Rev. Chim.), Year 2008, Volume 59, Issue 2, 205-207

https://doi.org/10.37358/RC.08.2.1734

Rodica-Mariana Ion, Daniel Boda

Porphyrin - Based Supramolecular Nanotubes Generated by Aggregation Processes

Abstract:

Porphyrins can form a variety of structures from linear head-to-tail or J-aggregates to fractal aggregates with different and specific photophysical properties. In this paper, the controlled aggregation of meso-5 ,10, 15, 20-sulfonato-phenyl porphyrin (H2TPPS44-) was studied at room temperature. Structure of the aggregates was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-visible spectroscopy. TEM and SEM results indicated the formation of organized nanostructures from the porphyrin derivative. UV-visible-NIR spectroscopic data showed broad red-shifted Soret band, indicating J-aggregation among the monomer units. Conjugate effect of lateral p-p interaction among the tetrapyrrole cores and hydrophobic interaction among the peripheral phenyl rings is believed to lead to the organized nanostructures. Such aggregates have the size of 5-6 nm in solution. The columnar structure formed by porphyrins has a length of 5 to 27 porphyrin unities.

Keywords:
porphyrin; aggregation; TEM; aggregates

Issue: 2008, Volume 59, Issue 2
Pages: 205-207
Publication date: 2008/3/9
https://doi.org/10.37358/RC.08.2.1734
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