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Updated: Apr 11, 2026

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
Published on: August 2, 2012
Complexation and Catenation in Aqueous Media Using a Self-Assembled Pd(II) Metallacyclic Receptor
Tamara Rama1, Eva M López-Vidal1, Marcos D García2
1Departamento de Química Fundamental, Facultad de Ciencias and Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, Rúa da Fraga 10, 15071 La Coruña (Spain), Fax: (+34) 981167065.
Abstract:
A M2L2 rectangular-shaped metallacycle, obtained by metal-directed self-assembly of a 2-(pyridin-4-ylmethyl)-2,7-diazapyrenium salt and [(en)Pd(NO3)2 (en=ethylenediamine), has been investigated as a molecular receptor for a wide range of aromatic substrates in water. Complexation and catenation of the receptor with selected mono- and polycyclic aromatic substrates produced 1:1 inclusion complexes and [2]catenanes in a highly efficient fashion, as determined by NMR and UV/Vis spectroscopic techniques, as well as single-crystal X-ray crystallography. Furthermore, the thermodynamic and kinetic features of the complexation processes have been analyzed for selected model guests.
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