The Malaysian Journal of Analytical Sciences Vol 12 No 1 (2008): 272 – 279

 

 

KETOHYDRAZONE COMPLEXES AS POTENTIAL EMITTING MATERIAL IN OLED

 

Haznita Rose Bahari, Mohd Nordin Garif  and Mustaffa Shamsuddin

 

Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia,

81310 UTM Skudai, Johor Bahru, Malaysia.

 

Abstract

Ketohydrazone is a molecule that is able to act as a bidentate ligand through the O of C=O and N of N=C in the molecule. Three    ketohydrazone    ligands    had    been      fully    synthesized      through    the    condensation    reaction      between    2- Hydroxynaphthal dehydes with various hydrazides: salisylic hydrazide, benzyhydrazide and 2-furoic acid hydrazide in a 1:1 stoichiometry.   The   ligands   had   been   characterized   using   infrared,   ¹HNMR   and   ultraviolet-visible   spectrometer. Complexation reaction between all ligands and metals, with a stoichiometry of 1:2 for Zn (II) : ligand and 1:3 for Al(III) : ligand  were  carried  out.  All  six  complexes  obtained  were  characterized  using  FTIR  and  UV-Vis  spectrometer.  The fluorescence properties of each ligands and complexes were investigated using luminescence spectrofluorometer excited at 406 nm. It was found that the compounds emitted blue light at λ_max = 470 nm. Results showed that all the ligands and molecules  synthesized  have  the  fluorescence  properties  and  complexation  with  metal  enhanced  the  intensity  of  the fluorescence. It was observed that complex of Al(NDB)₃ showed the best potential as an emitting material for OLED as it has the highest fluorescence intensity compared to others.

 

Keywords: ketohydrazone, fluorescence, OLED.

 

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