Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 13, Issue 6, Pages 1333-1339Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b300529a
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The mixed double-decker Eu[Pc(15C5)(4)](TPP) (1) was obtained by base-catalysed tetramerisation of 4,5-dicyanobenzo-15-crown-5 using the half-sandwich complex Eu(TPP)(acac) (acac=acetylacetonate), generated in situ, as the template. For comparative studies, the mixed triple-decker complexes Eu-2[Pc(15C5)(4)](TPP)(2) (2) and Eu-2[Pc(15C5)(4)](2)(TPP) (3) were also synthesised by the raise-by-one-story method. These mixed ring sandwich complexes were characterised by various spectroscopic methods. Up to four one-electron oxidations and two one-electron reductions were revealed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). As shown by electronic absorption and infrared spectroscopy, supramolecular dimers (SM1 and SM3) were formed from the corresponding double-decker 1 and triple-decker 3 in the presence of potassium ions in MeOH/CHCl3.
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