Optical-limiting-based materials of mono-functional, multi-functional and supramolecular C60-containing polymers

By using nanosecond laser pulses at 532-nm wavelength, we have intensively studied the optical limiting (OL) and nonlinear optical (NLO) properties of some new composites which consist of mono-functional 1,2-dihydro-1,2-methanofullerene[60]-61-carboxylic acid (FCA), multi-functional fullerenol (Fol), and supramolecular C60(HNC4H8NCH3)9-containing polymers. The optical limiting performance of FCA/poly(styrene-co-4-vinylpyridine) is found to be better than that of its parent C60, while the multi-functional fullerenol and supramolecular C60(HNC4H8NCH3)9 incorporated with polymers show poorer optical limiting responses. The possible sources for the improvement in the optical limiting are discussed.