Sulfate-induced large amplitude conformational change in a Solomon link

Cuong Dat Do; Dávid Pál; Andrey Belyaev; Marion Pupier; Anniina Kiesilä; Elina Kalenius; Bartomeu Galmés; Antonio Frontera; Amalia Poblador-Bahamonde; Fabien B. L. Cougnon

doi:10.1039/D3CC04555B

Sulfate-induced large amplitude conformational change in a Solomon link†

Cuong Dat Do,

^a Dávid Pál,

^a Andrey Belyaev,

^b Marion Pupier,^a Anniina Kiesilä,^b Elina Kalenius,

^b Bartomeu Galmés,

^c Antonio Frontera,

^c Amalia Poblador-Bahamonde

^a and Fabien B. L. Cougnon

‡*^ab

Author affiliations

* Corresponding authors

^a Department of Organic Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland

^b Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014 JYU, Finland
E-mail: fabien.b.l.cougnon@jyu.fi

^c Department de Química, Universitat de les Illes Balears, Carretera de Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, Spain

Abstract

A doubly-interlocked [2]catenane – or Solomon link – undergoes a complex conformational change upon addition of sulfate in methanol. This transformation generates a single pocket where two SO₄²⁻ anions bind through multiple hydrogen bonds and electrostatic interactions. Despite the close proximity of the two anions, binding is highly cooperative.

This article is part of the themed collection: Conference collection: 6th ERC Grantees Conference 2025

Chemical Communications

Sulfate-induced large amplitude conformational change in a Solomon link†

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