Structural analysis of calix[n]arene-iron(III) complexes (n=4,∈6,∈8) and thermal decomposition of the parent calix[n]arenes

Deligöz H., Özen Ö., KOYUNDERELİ ÇILGI G.

Journal of Coordination Chemistry, vol.60, no.1, pp.73-83, 2007 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 60 Issue: 1
  • Publication Date: 2007
  • Doi Number: 10.1080/00958970600784124
  • Journal Name: Journal of Coordination Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.73-83
  • Keywords: Calix[n]arene, FT-IR, 1H NMR spectroscopy, Iron(III) complexes, TG/DTA, Thermal analysis
  • Manisa Celal Bayar University Affiliated: No

Abstract

In this study, six new calix[n]arene-Fe3+ complexes (n∈=∈4,∈6,∈8) were synthesized with parent calix[n]arenes in a DMF solution of FeCl3∈•∈H2O. The properties and coordination characteristics of the six parent calix[n]arene-Fe3+ complexes were determined by elemental analyses, TG-DTA, UV-vis, FT-IR and 1H NMR spectroscopy. According to UV-vis analysis, in the six complexes the iron(III) coordinated by oxygen donor atoms from calix[n]arene ligands and DMF molecules. The complexes behave as 1∈:∈1 and 1∈:∈2 electrolytes in the case of calix[n]arenes (n∈=∈4,∈6) (1-4) and calix[8]arene (5, 6), respectively. 1H NMR studies demonstrate that 1 and 2 are more stable than 3, 4, 5 and 6 in DMF, and indicate cone conformation of the calix[4]arene ligands (1 and 2).