Photoinduced polymerization of solid C70 films

Pressure-assisted photopolymerization in the molecular donor-acceptor fullerene complex {Cd(dedtc)2}2•C60

“…Recently, the photo-induced transformations at high pressure were observed in the Raman spectra of the molecular complex {Cd(dedtc) 2 } 2 ·C 60 which take place immediately after the pressure-induced phase transition near 2 GPa [9]. The time-dependent changes in the A g (2) mode region are reminiscent of those in the Raman spectra of C 60 fullerene under light irradiation [10].…”

“…C 60 fullerite polymerizes under illumination [10], alkali metal doping [11] and high-pressure/high-temperature (HPHT) treatment [12,13]. The polymerization of C 60 is realized through the creation of covalent bonds among adjacent fullerene molecules via a [2+2] cyclo-addition mechanism that necessitates the rotation of molecules to attain a suitable mutual orientation [10,14].…”

“…C 60 fullerite polymerizes under illumination [10], alkali metal doping [11] and high-pressure/high-temperature (HPHT) treatment [12,13]. The polymerization of C 60 is realized through the creation of covalent bonds among adjacent fullerene molecules via a [2+2] cyclo-addition mechanism that necessitates the rotation of molecules to attain a suitable mutual orientation [10,14]. The photopolymerization is efficient in thin films or the surfaces of bulk samples, owing to the small light penetration depth (∼ 1 µm near 500 nm); the photo-transformed material is rather disordered and contains various oligomers [15,16].…”

Polymeric fullerene oxide films produced by decomposition of hexanitro[60]fullerene

“…To take advantage of the unique properties of the molecule and explore its potential applications as an optoelectronic material, quite a few research groups have attempted to prepare fullerenes into polymer and thin film forms [9,10]. Several approaches for the preparation of fullerene oligomers and polymers as carbon-based solids were reported in some prior studies, including photochemical [11], thermal [12], high pressure [13], plasma [14], thermobaric [15], and electro-induced methods [16]. Photoinduced polymerization of solid C 60 to form a polyfullerene film is known to follow a [2 + 2] condensation mechanism.…”

“…Photoinduced polymerization of solid C 60 to form a polyfullerene film is known to follow a [2 + 2] condensation mechanism. For instance, the mass of fragmentation ions corresponding to an octamer of C 60 was detected from the phototransformed carbon-60 films by laser desorption mass spectrometry (LDMS) [11]. Thermal polymerization of C 60 could be achieved by following the metal reduction of fullerene cages with potassium and subsequent radical coupling to doped (KC 60 ) n [12].…”