Hybrid materials with an increased resistance to hard X-rays using fullerenes as radical sponges

The protection of organic and hybrid organic-inorganic materials from X-ray damage is a fundamental technological issue for broadening the range of applications of these materials. In the present article it is shown that doping hybrid films with fullerenes C₆₀ gives a significant reduction of damage upon exposure to hard X-rays generated by a synchrotron source. At low X-ray dose the fullerene molecules act as radical scavengers, considerably reducing the degradation of organic species triggered by radical formation. At higher doses the gradual hydroxylation of the fullerenes converts C₆₀ into fullerol and a bleaching of the radical sinking properties is observed.