1. School of Chemistry, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, Dublin 2, Ireland
2. Department of Chemistry, University of Pavia, v.le Taramelli 12, Pavia 27100, Italy
3. Department of Chemistry & Chemical Technologies, via Pietro Bucci, Arcavacata di Rende, Cosenza 87036, Italy
4. Consiglio Nazionale Delle Ricerche, Istituto di Chimica del Riconoscimento Molecolare (ICRM), via M. Bianco 9, Milano 20131, Italy