Photopolymerization in the Fullerene Layers of the Molecular Donor–Acceptor Complex {Pt(nPr2dtc)2} · (C60)2

Abstract

We measured Raman spectra in crystals of molecular donor–acceptor fullerene complexes {Me(nPr₂dtc)₂} · (C₆₀)₂ (Me = Ni, Cu, Pt). In the spectra of the {Pt(nPr₂dtc)₂} · (C₆₀)₂ complex under prolonged irradiation with a laser with λ = 532 nm, characteristic changes in the photopolymerization of fullerene are observed, associated with the splitting of degenerate phonon Hg modes and softening of Ag modes of the C₆₀ molecule. The kinetics of photopolymerization under conditions of weak irradiation at room temperature is studied. It was found that thermal destruction of the photopolymer with increasing temperature leads to a decrease in its concentration in the final photopolymerization product. The kinetics of thermal destruction is described by the Arrhenius equation, with the activation energy E_A of (0.68 ± 0.03) eV; the dimers are destructed to a concentration of 1% within 15 min at ~114°C.