Synthesis of new liquid scintillation materials based on phosphorus or silicium containing nanoparticles

The aim of this thesis is to create new liquid scintillation materials by synthesizing natural compounds and nanomaterials which can be called greener synthesis. One of the compound was Lawson diphosphate (Lawson-P), a phosphate-containing derivative of the Lawson molecule (2-hydroxy-1,4-naphthoquinone). For this purpose, the Lawson molecule, one of the main molecules of the henna (Lawsonia inermis) plant, was phosphorylated and Lawsondiphosphate (Lawson - P) was formed. In the next step, Lawson-P (LW-P-O- (Si (OH) 3) was formed, which was silicified by silica. The other system studied is TiO2 nanoparticles and their silicate and silane derivatives. TiO2 nanoparticles were synthesized, coated with silica to form TiO2 nanoparticles (TiO2-O-Si (OH)3) and silanated to form silane coated TiO2 nanoparticles (TiO2-O-Si-(CH2)3NH2). HPLC analysis of each synthesis step was performed by using high performance liquid chromatography (HPLC) equipment for quality control of the resulting structures. Fourier transformed infrared spectrometry (FT-IR) method, chemical structure analysis, fluorometric spectra were investigated. The scanning electron microscope (SEM) for surface properties was performed by dynamic light scattering method (DLS). The use of nanosystems synthesized using I-131, Tc-99m, Sr-90 and I- 125 radionuclides as liquid scintillators was investigated and compared with diisopropylnaphthalene used as commercial liquid scintillator material. The results showed that the silicon derivatives of the Lawson molecule obtained from the henna plant and the silicate derivatives of the TiO2 nanoparticles could alternatively be an alternative because they did not show toxicity with respect to conventional commercial scintillators.