Paramagnetic properties and molecular structure of coordination saturated inclusive lanthanide complexes with 18-crown-6 using NMR

Sergey P. Babailov

Research output: Contribution to journalArticle

Abstract

Earlier NMR spectra of lanthanide complexes [Ln(18-crown-6)(NO3)3] have been analyzed by us (Babailov in Inorg Chem 51(3):1427-1433, 2012), where Ln3+ = La3+ (I), Ce3+ (II), Pr3+ (III) and Nd3+ (IV). The NMR signal assignment and conformational molecular dynamic have been found by 1D NOE and relaxation spectroscopy as well as on 2D NOESY and EXSY experiments at 170 K. In the present paper the 1H NMR method is used to study the features of paramagnetic properties of complexes I-IV and [Eu(18-crown-6)(NO3)3] (V) at ambient temperature. The investigation was carried out by special method based on analysis of Δδ/z> on k(Ln)/z> (where k(Ln) is Bleaney's constant, Δδ is paramagnetic contribution to the lanthanide-induced shifts). The obtained results indicate that the structure of the complexes (in CDCl3 and CD2Cl2) are very similar.

Original languageEnglish
Pages (from-to)377-381
Number of pages5
JournalJournal of Inclusion Phenomena and Macrocyclic Chemistry
Volume80
Issue number3-4
DOIs
Publication statusPublished - 2014
Externally publishedYes

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Keywords

  • 18-Crown-6
  • Complexes of lanthanides
  • Crown ethers
  • NMR
  • Paramagnetic lanthanide-induced shifts
  • Structure similarity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Food Science
  • Chemistry(all)

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