Template Effects in the Formation of Pseudo-rotaxanes Containing Diazapyrenium Units
journal contributionposted on 2007-02-16, 00:00 authored by Giancarlo Doddi, Gianfranco Ercolani, Paolo Mencarelli, Giuseppe Papa
The template effects exerted by guests 14 and 15 in the ring closure reaction of 3 have been quantitatively evaluated. The rate largely increases in the presence of the two templates. The results are compared with those relative to the ring closure reaction of 1 yielding cyclobis(paraquat-p-phenylene), 2. The comparison indicates that the formation of tetracationic aromatic cycles templated by aromatic donors benefits from the use of extended π surfaces both in the acceptor and in the donor components.