title: Complexation and Catenation in Aqueous Media Using a Self-Assembled Pd(II) Metallacyclic Receptor.
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.
authors.affiliation: Departamento 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.
authors.forename: Tamara
authors.initials: T
authors.lastname: Rama
authors.affiliation: Departamento 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.
authors.forename: Eva M
authors.initials: EM
authors.lastname: López-Vidal
authors.affiliation: Departamento 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. marcos.garcia1@udc.es.
authors.forename: Marcos D
authors.initials: MD
authors.lastname: García
authors.affiliation: Departamento 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. carlos.peinador@udc.es.
authors.forename: Carlos
authors.initials: C
authors.lastname: Peinador
authors.affiliation: Departamento 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.
authors.forename: José M
authors.initials: JM
authors.lastname: Quintela
keywords: catenanes; host-guest chemistry; inclusion compounds; molecular recognition; self-assembly