Synthesis and Spectroscopic Properties of Porphyrin Derivatives of C60

Abstract

Chemical synthesis of two C₆₀ fullerene derivatives: with porphyrin (C₆₀-H₂P) and of the iodide salt of Zn porphyrin (C₆₀-ZnP)⁺I⁻ is described. Both compounds are soluble in several organic solvents, with a larger solubility observed for C₆₀-H₂P. Thin films obtained by solution drawing or by spinning techniques from C₆₀-H₂P solution in organic solvents or dissolved in a polymer matrix show a peculiar granular structure with regular submicron size particles. Their size of is a little smaller in polymer matrix. The solution UV–Vis absorption spectra exhibit typical bands which can be attributed to porphyrin and to the fullerene. A solvatochromic effect is observed in C₆₀-H₂P which shows a nonzero first hyperpolarizability β, most likely due to the charge transfer between fullerene and porphyrin.

Keywords:

• Aggregation
• fullerene C₆₀
• Guterman model
• nanoparticles
• porphyrine
• zinc porphyrin