| dc.description.abstract | Photoluminescence (PL), time-resolved, excitation, and infrared (IR) spectra of Eu(NO3)3 ·5H2O and Eu(NO3)3 ·6H2O were recorded at 100℃, and 200℃ after various heating time (3 days, 5 days, 7 days, 10 days). Based upon the spectra and emission decay curves (5D0 and 5D1), in these water-containing nitrates heated at 100℃, the crystalline water molecules are removed in the first 3 days of heating following by the removal of the coordination water molecules. These two water-containing nitrates will eventually form similar structures after heating for 10 days. At 200℃, in addition to the water removal, the coordinated nitrates are also removed and this results in more complicated spectra and decay curves. These changes could arise from the change of coordination environments and the formation of other species such as oxynitrates or more complex compounds. This thesis will use spectroscopic data to elucidate the structural and chemical changes of these two water-containing nitrates in the heating process. | en_US |