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Article

Enhanced Silver Ion Binding to a Rigid Bisarene Molecular Cleft with Formation of Nonpolar Pleated Sheets through Non-Ionic Intermolecular Forces

Supporting Info

Adolf Gogoll, Prasad Polavarapu, and Helena Grennberg*

Department of Biochemistry and Organic Chemistry, Uppsala University, Box 576, S-75123 Uppsala, Sweden

Inorg. Chem., 2007, 46 (13), pp 5271–5275

DOI: 10.1021/ic070222z

Publication Date (Web): May 24, 2007

To whom correspondence should be addressed. E-mail: Helena.Grennberg@biorg.uu.se.

Abstract

Silver ion complexation to bisarene ligands is enhanced by providing a conformationally rigid molecular cleft in the (Z)-acenaphthylene dimer 1. NMR titrations were used to determine complexation constants K for a series of ligands in tetrahydrofuran solution, with K = 4.9 M^-1 for the Z dimer 1 and 0.4 M^-1 for the E dimer 2. Higher values of K were observed in CDCl₃/CD₃OD 9:1 with K = 38 M^-1 for 1 and K = 4.1 M^-1 for 2. In the solid state, isolated clusters of [1·(AgCF₃SO₃)₂]₂ form a novel, pleated-sheet motif based on non-ionic interactions between clusters.