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 EA of (0.68 ± 0.03) eV; the dimers are destructed to a concentration of 1% within 15 min at ~114°C.