2016. 57, 4 – UDC 541.6:541.49:546.821 STRUCTURE AND PHOTOLUMINESCENCE PROPERTIES OF TiO2 NANOPARTICLES SYNTHESIZED FROM A NOVEL LUMINESCENT NANO-TITANIUM COMPLEX V. Jodaian1, N.S. Langeroodi2, E. Najafi3 1Faculty of Science, Chemistry Department, Islamic Azad University, Islamshahr Branch, Iran E-mail: hvidajodaian@yahoo.co.nz. 2Science Faculty, Chemistry Department, Golestan University, Gorgan, Iran 3Department of Chemistry, Payame Noor University (PNU), Tehran, Iran Received April, 6, 2015 Revised — April, 29, 2015 A new titanium complex [Ti(Me—Q)2(Cl)2] (1) is prepared by reacting titanium tetrachloride with 2-methyl-8-hydroxyquinoline in a fast and facile process. <...> The complex is fully characterized based on its 1H and 13C NMR, IR, and UV spectra and elemental analysis. <...> The prepared nanostructured compound is synthesized by the sonochemical method. <...> This new nanostructure is characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), IR spectroscopy, and elemental analysis. <...> Thermal stability of single crystalline and nanosize samples of the prepared compound is studied by thermal gravimetric (TG) and differential thermal analysis (DTA). <...> The prepared complexes both bulk and nanosized are utilized as a precursor for the preparation of TiO2 nanoparticles by direct thermal decomposition at 600 C in air. <...> The morphology and size of TiO2 nanoparticles are determined by SEM, powder XRD, and IR spectroscopy and the results show that the TiO2 nanoparticle size depends on the initial particle size of 1. <...> Photoluminescence (PL) properties of the nanostructured and crystalline bulk prepared complex and their TiO2 nanoparticle cores are investigated. <...> INTRODUCTION There continues to be great interest in combining proper ligands and metal ions to produce novel luminescent coordination compounds. <...> Ligands and metal are a proper choice for attaining a good structural design and a strong application [ 1—5]. <...> In this context, the molecular structures and luminescent properties of large numbers of coordination compounds have been investigated [ 6—12]. <...> On the other hand, the synthesis and design of novel luminescent nanostructured coordination compounds have been subject to rapid growth in recent years because of their unique electronic, magnetic, and optical properties [ 13—16 ]. <...> It is <...>