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

Nawal K. Al-Rasbi; Harry Adams; Fakhreldin O. Suliman

doi:10.1016/j.dyepig.2013.12.030

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

Nawal K. Al-Rasbi^*, Harry Adams, Fakhreldin O. Suliman

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

22 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 language	English
Pages (from-to)	83-88
Number of pages	6
Journal	Dyes and Pigments
Volume	104
DOIs	https://doi.org/10.1016/j.dyepig.2013.12.030
Publication status	Published - May 2014

Keywords

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

ASJC Scopus subject areas

General Chemical Engineering
Process Chemistry and Technology

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10.1016/j.dyepig.2013.12.030

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@article{32003e50325b4f5396b1d2707b462e1c,

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

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.",

keywords = "Crystal structure, Energy transfer, Lanthanides, Luminescence, Schiff bases, White-light emission",

author = "Al-Rasbi, {Nawal K.} and Harry Adams and Suliman, {Fakhreldin O.}",

note = "Funding Information: We would like to thank Dr Anna Sudlow (university of Bath, UK) for recording the 1 H NMR spectrum of complex 1 . We also thank Sultan Qaboos University for financial support. ",

year = "2014",

month = may,

doi = "10.1016/j.dyepig.2013.12.030",

language = "English",

volume = "104",

pages = "83--88",

journal = "Dyes and Pigments",

issn = "0143-7208",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Synthesis, structure and tunable white-light emission of dinuclear Eu(III) Schiff base complex

AU - Al-Rasbi, Nawal K.

AU - Adams, Harry

AU - Suliman, Fakhreldin O.

N1 - Funding Information: We would like to thank Dr Anna Sudlow (university of Bath, UK) for recording the 1 H NMR spectrum of complex 1 . We also thank Sultan Qaboos University for financial support.

PY - 2014/5

Y1 - 2014/5

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.

KW - Crystal structure

KW - Energy transfer

KW - Lanthanides

KW - Luminescence

KW - Schiff bases

KW - White-light emission

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U2 - 10.1016/j.dyepig.2013.12.030

DO - 10.1016/j.dyepig.2013.12.030

M3 - Article

AN - SCOPUS:84892708735

SN - 0143-7208

VL - 104

SP - 83

EP - 88

JO - Dyes and Pigments

JF - Dyes and Pigments

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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