Crystal structure and photoluminescence properties of gadolinium picrate triethylene glycol complex

Eny Kusrini, Muhammad Idiris Saleh, Donni Adinata, Mohd Mustaqim Rosli, Hoong Kun Fun

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The [Gd(Pic) 2(H 2O)(EO3)](Pic)·CH 3OH complex, where EO3 = triethylene glycol, and Pic = picrate anion, has been prepared and characterized. The complex is crystallized in triclinic with space group P-1. The Gd(III) ion is coordinated to nine donor oxygen atoms from one EO3 ligand, two Pic anions and one water molecule. The geometric arrangement of the heavier lanthanide-picrate complex is different with the lighter lanthanide-picrate complexes as observed. The charge balancing and steric hindrance of the bulky of picrate anion have influenced the geometric arrangement in the inner-sphere. Two intramolecular hydrogen bonds O1-H1O1·O26 and C6- H6A·O13 help in stabilizing of complex. Extensive intermolecular hydrogen bonds O-H·O and C-H·O linked the molecules into two-dimensional layer and parallel to the (011) plane as observed. No metal centered emission can be observed for the Gd complex. The phosphorescence spectrum of Gd complex in the solid state showed the central peak at 537.8 nm which related to the emission of the picrate anion.

Original languageEnglish
Pages (from-to)859-865
Number of pages7
JournalJournal of Chemical Crystallography
Volume42
Issue number8
DOIs
Publication statusPublished - 1 Aug 2012

Keywords

  • Coordination
  • Gadolinium
  • Hydrogen bonding
  • Picrate complex
  • Triethylene glycol

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