C 60 Pd n polymer-like materials were prepared and reacted with toluene, one of the harmful gases. Toluene was successfully adsorbed on C 60 Pd n at ambient temperature without additional energy sources. This adsorptivity was retained even at low concentration of 1000 ppb, which is close to the actual toluene concentration in the environment. The strong adsorption of toluene molecules toward C 60 Pd n was confirmed by IR, TG-IR, and cyclic voltammetry. The πelectrons of toluene are believed to

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... dsorb on the partially positive Pd atoms of C 60 Pd n , and theoretical studies have suggested that the π-electrons of C 60 and toluene overlap through the d-electron orbitals of the Pd atom, representing not just physical adsorption. This result should open the door to application of fullerene materials as adsorbents for harmful gases.