D.Frolov,R.Purlys*, S.Bagdonas, R.Rotomskis, M.Gavutis
Laser Research Centre, Vilnius University, Sauletekio 9, 2040 Vilnius Lithuania
*Physics Faculty, Vilnius University, Sauletekio 9, 2040 Vilnius, Lithuania

• Abstract
• Introduction
• Materials and Methods
• Results and Discusion
• Conclusions
• References

The formation conditions and the structure of J-aggregates of meso-tetra(4-sulfonathophenyl) porphine (TPPS₄) were under investigation. It was shown that the J-aggregates are a natural form of aggregated dianions (H₂⁺P(SO₃^-)₄) of TPPS4 molecules.

It is shown, that one of the possible reasons for the formation of J-aggregates in acidic solutions is the interaction between the negatively charged sulphonato- groups and the positively charged central part of the porphyrin ring.

The structural model of J-aggregate was built on the basis of X ray diffraction and atomic force microscopy data.

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