Synthesis of Luminescent Borate Compounds and Multi Functional Mesoporous Silicates for Poor Water Soluble Drug’s Delivery

The luminescence properties of inorganic materials could be potentially employed for dosimetric purposes in the case of radiation accident or radiological terrorism where conventional monitoring has not been established. This work focuses on the thermo(TL) and cathodoluminescence (CL) emission of several biogenic materials including winkle shell (made of Ca-rich carbonates -calcite 90% and aragonite 10%-), kidney stones and gallbladder (Ca-rich oxalates –whewellite-) and bones (Ca-rich phosphates – hydroxyapatite-) previously characterized by Environmental Scanning Microscope (ESEM) and X-ray diffraction (XRD). All of them displays complex CL wavebands peaked in the red region (linked to point defects) and the more intense emission appearing at higher energies (mainly associated with structural defects). The TL emission exhibits a complex structure too, where it is not possible to detect groups of components that could be potentially employed for dose assessment. The UV-blue TL emission of the samples displays (i) different threshold to ionizing radiation sensitivity depending on the composition, (ii) linear dose response in the range that changes with the sample, but all of them (iii) exhibit a stability of the induced TL signal after one month of storage. LES