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RESEARCH ARTICLE
Contents Vol 63(6)

Synthesis, Characterization, and Photoluminescent Properties of ZnII, CdII, and HgII Complexes with N,O Hybrid Pyrazole Ligand

Miguel Guerrero A , Josefina Pons A C , Mercè Font-Bardia B , Teresa Calvet B and Josep Ros A
+ Author Affiliations
- Author Affiliations

A Departament de Química, Unitat de Química Inorgànica, Universitat Autònoma de Barcelona, 08193-Bellaterra, Barcelona, Spain.

B Cristal·lografia, Mineralogia i Dipòsits Minerals, Universitat de Barcelona, Martí i Franquès s/n, 08028-Barcelona, Spain.

C Corresponding author. Email: Josefina.Pons@uab.es

Australian Journal of Chemistry 63(6) 958-964 https://doi.org/10.1071/CH10040
Submitted: 21 January 2010  Accepted: 9 March 2010   Published: 11 June 2010

Abstract

The synthesis and characterization by elemental analysis, mass spectrometry, conductance measurements, IR, 1H, and 13C NMR spectroscopies of compounds with the general formula [MCl2(L)2], where M = Zn (1), Cd (2), or Hg (3) and L = 1-(2-hydroxyethyl)-3,5-dimethylpyrazole have been described. The 113Cd{1H} and 199Hg{1H} NMR spectra were also measured to investigate the coordination environment of the metal in solution. The structure of complex [ZnCl2(L)2] was determined by single-crystal structure analysis. The extended structure revealed a 1D chain caused by several O–H···CH3 intermolecular interactions. Moreover, we have determined the fluorescent properties of complexes 1–3; it was found that L demonstrates the higher sensibility to HgII ion, one of the most toxic agent in the environment. The preliminary results indicate that L could have a promising future for the detection of mercury in real environmental samples.


Acknowledgements

This work has been financially supported by the Spanish Ministry of Culture and Education (Project CTQ2007–63913) and by Generalitat de Catalunya (a grant to M.G.). We are very grateful to Dr Arben Merkoçi for useful discussions and analysis of the fluorescence spectra.


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