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Lumi nescent Nanoparticles Obtained by Thermal
Decomposition o f Coordination Compounds
Andrei V. RACU1,2*, Mihai -Cosmin PASCARIU1,2,3, Bogdan ȚĂRANU1,
Loreta -Andrea BOŽIN4, Eugen ȘIȘU4, Mircea Niculescu2,5*
1National Institute of Research & Development for Electrochemistry and Condensed Matter –
INCEMC, Renewable Energies – Photovoltaic Laboratory, 144 Dr. Aurel Păunescu -Podeanu, RO –
300569 Timișoara, Romania ; 2“Chemeia Semper” Association, 6A Giuseppe Verdi, R O-300493
Timișoara, Romania ; 3“Vasile Goldiș” Western University of Arad, Faculty of Pharmacy, 86 Liviu
Rebreanu, RO -310414 Arad, Romania ; 4“Victor Babeș” University of Medicine and Pharmacy of
Timișoara, Faculty of Medicine, 2 Eftimie Murgu Sq., RO -300041 Timișoara, Romania ;
5University Politehnica Timisoara, Faculty of Industrial Chemistry and Environmental
Engineering, 6 Vasile Pârvan Blvd., RO -300223 Timișoara, Romania ; e-mail:
[anonimizat]; [anonimizat]

Complex compounds composed of metal ions and organic ligands [1] can be used as precursors for micro – and
nanoparticles with interesting properties, which include fluorescence and phosphorescence that are important for the
imagistic identification of various medical pathologies. In particular, the magnesium –aluminum and strontium –aluminum
polyoxalates ar e convenient precursors for the MgAl 2O4 and, respectively, SrAl 2O4 spinels [2]. Furthermore, lanthanide –
doped spinels show promising optical properties, which make them valid candidat: [anonimizat], we present a preparation me thod for such nanoparticles, which is based on the thermal decomposition of
heteropolynuclear coordination compounds. The thus -prepared nanopowder s were characterized by X-ray diffraction ,
transmission electron microscopy , energy -dispersive X -ray spectrosc opy and Fourier transform infrared spectroscopy . The
visible green light emission of the obtained erbium -doped spinels under ultraviolet pumping was confirmed by
spectrofluorimetry.

This work was partially supported by the Romanian National Authority for Scientific Research (CNCS –UEFISCDI)
through projects PN -II-PCCA -2011 -142 and POSCCE 185/48749 (contract 677/09.04.2015).

References:
1. Niculescu, M., Pascariu, M.C., Muntean, C., Sasca, V., Lupa, L., Milea, M.S., Bîrzescu, M., Thermal and
spectroscopic a nalysis of Co(II) –Fe(III) polyglyoxylate obtained through the reaction of ethylene glycol with metal
nitrates, J. Therm. Anal. Calorim. 2017; doi: 10.1007/s10973 -016-6079 -1.
2. Ganesh, I., A review on magnesium aluminate (MgAl 2O4) spinel: synthesis, processing and applications , International
Materials Reviews 2013 ; 58(2):63-112; doi: 10.1179/1743280412Y.0000000001 .