1 Department of Chemistry, Life Science and Environmental Sustainability and INSTM UdR Parma, University of Parma Parco Area delle Scienze 17/A, 43124 Parma, Italy. enrico.dalcanale@unipr.it.
2 CNR-IMM Bologna, Via P. Gobetti 101, 40129 Bologna, Italy.
The selectivity and efficiency of benzene and toluene uptake at the gas-solid interface by quinoxaline cavitands is strongly enhanced by partial rigidification of the receptor cavity and immobilization of the cavitand onto silica gel particles.