A tristable [2]pseudo[2]rotaxane

作者:Trabolsi Ali; Fahrenbach Albert C; Dey Sanjeev K; Share Andrew I; Friedman Douglas C; Basu Subhadeep; Gasa Travis B; Khashab Niveen M; Saha Sourav; Aprahamian Ivan; Khatib Hussam A; Flood Amar H; Stoddart J Fraser*
来源:Chemical communications, 2010, 46(6): 871-873.
DOI:10.1039/b918321c

摘要

A strategy towards increasing the lifetime of the metastable state of a [2]rotaxane incorporating tetrathiafulvalene, 1,5-dioxynaphthalene and bipyridinium (BIPY(2+)) is presented. Incorporation of BIPY(2+) served multiple roles as an electrostatic barrier to relaxation, a supramolecular recognition site for bis-1,5-dioxynaphthalene[38]crown-10 macrocycle, and upon reduction a recognition site for the mechanically bonded cyclobis(paraquat-p-phenylene) ring.