Flexible molecular receptors having three aromatic chromophores can bind el
ectron-deficient pi-system such as TCNQ, PDA, TCNB with both face-to-face a
nd face-to-edge interactions. A syn cofacial orientation of the two termina
l aromatic rings is effective for binding the guest. (C) 1999 Elsevier Scie
nce Ltd. All rights reserved.