Journal or Book Title
The Journal of Organic Chemistry
Association constants of a bis-(acetylguanidinium)ferrocene dication to various (di)carboxylates were determined through UV–vis titrations. Association constant values greater than 104 M–1 were determined for both phthalate and maleate carboxylates to the bis-(acetylguanidinium)ferrocene salt in pure water. Density functional theory computations of the binding enthalpy of the rigid carboxylates for these complexes agree well with the experimentally determined association constants. Catch and release competitive binding experiments were done by NMR for the cation–carboxylate ion-pair complexes with cucurbituril, and they show dissociation of the ion-pair complex upon addition of cucurbituril and release of the free (di)carboxylate.
American Chemical Society
Beck, Christie L. and Winter, Arthur, "Noncovalent Catch and Release of Carboxylates in Water" (2014). Chemistry Publications. 148.