title: Allyl-functionalized dioxynaphthalene[38]crown-10 macrocycles: synthesis, self-assembly, and thiol-ene functionalization.
abstract: Five dioxynaphthalene[38]-crown-10 (DNP38C10) macrocycles bearing one, two, three, or four allyl moieties have been synthesized and their ability to spontaneously self-assemble with methyl viologen to form [2]pseudorotaxanes has been evaluated. Association constants between methyl viologen and several of the allyl-functionalized DNP38C10 macrocycles are found to be comparable to that of methyl viologen and unfunctionalized DNP38C10, however, the enthalpic and entropic factors that underlie overall binding free energy vary systematically with increasing allyl substitution. These variations are explained through a combination of solution phase and solid-state analysis of the macrocycles and their complexes. The utility of endowing DNP38C10 macrocycles with allyl moieties is further demonstrated by the ease with which they can be functionalized through thiol-ene click chemistry.
authors.affiliation: Department of Chemistry, Wesleyan University, 52 Lawn Avenue Middletown, CT 06459 (USA).
authors.forename: Umesh
authors.initials: U
authors.lastname: Choudhary
authors.forename: Brian H
authors.initials: BH
authors.lastname: Northrop
keywords: click chemistry; crown compounds; host-guest systems; self-assembly; supramolecular chemistry