Synthesis, structure and tunable white-light emission of dinuclear Eu(III) Schiff base complex

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The structures and photophysical properties of Ln(III) [europium(III), terbium(III) and gadolinium(III)] complexes with the Schiff base ligands L: (E)-N′-((2-hydroxynaphthalen-1-yl)methylene)acetohydrazide have been investigated. Single crystal X-ray structure of the Eu(III) complex shows two unsymmetrical metal centers that are directly linked by three, near symmetrical phenoxo bridges. The complex exhibits extensive intramolecular stacking interactions between the naphthalene rings that lead to the formation of an excimer. By proper tuning of solvent's polarity and molecular aggregation, excitation of the Eu(III) complex in dichloromethane exhibits white emission expanding the visible region composed of blue (ligand), green (excimer) and red (sensitized Eu(III) centre) luminescence.

Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalDyes and Pigments
Volume104
DOIs
Publication statusPublished - May 2014

Fingerprint

Schiff Bases
Light emission
Ligands
Terbium
Europium
Gadolinium
Methylene Chloride
Dichloromethane
Naphthalene
Luminescence
Agglomeration
Tuning
Metals
Single crystals
X rays
naphthalene

Keywords

  • Crystal structure
  • Energy transfer
  • Lanthanides
  • Luminescence
  • Schiff bases
  • White-light emission

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology

Cite this

Synthesis, structure and tunable white-light emission of dinuclear Eu(III) Schiff base complex. / Al-Rasbi, Nawal K.; Adams, Harry; Suliman, Fakhreldin O.

In: Dyes and Pigments, Vol. 104, 05.2014, p. 83-88.

Research output: Contribution to journalArticle

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AU - Al-Rasbi, Nawal K.

AU - Adams, Harry

AU - Suliman, Fakhreldin O.

PY - 2014/5

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N2 - The structures and photophysical properties of Ln(III) [europium(III), terbium(III) and gadolinium(III)] complexes with the Schiff base ligands L: (E)-N′-((2-hydroxynaphthalen-1-yl)methylene)acetohydrazide have been investigated. Single crystal X-ray structure of the Eu(III) complex shows two unsymmetrical metal centers that are directly linked by three, near symmetrical phenoxo bridges. The complex exhibits extensive intramolecular stacking interactions between the naphthalene rings that lead to the formation of an excimer. By proper tuning of solvent's polarity and molecular aggregation, excitation of the Eu(III) complex in dichloromethane exhibits white emission expanding the visible region composed of blue (ligand), green (excimer) and red (sensitized Eu(III) centre) luminescence.

AB - The structures and photophysical properties of Ln(III) [europium(III), terbium(III) and gadolinium(III)] complexes with the Schiff base ligands L: (E)-N′-((2-hydroxynaphthalen-1-yl)methylene)acetohydrazide have been investigated. Single crystal X-ray structure of the Eu(III) complex shows two unsymmetrical metal centers that are directly linked by three, near symmetrical phenoxo bridges. The complex exhibits extensive intramolecular stacking interactions between the naphthalene rings that lead to the formation of an excimer. By proper tuning of solvent's polarity and molecular aggregation, excitation of the Eu(III) complex in dichloromethane exhibits white emission expanding the visible region composed of blue (ligand), green (excimer) and red (sensitized Eu(III) centre) luminescence.

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KW - Lanthanides

KW - Luminescence

KW - Schiff bases

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