| Summary: | 碩士 === 國立中央大學 === 化學學系 === 106 === Spectroscopic techniques such as photoluminescence, excitation, and time-resolved spectra were used to study the coordination polymers, R2(C8H10O4)3, (R= Y, Sm, Tb, C8H10O4: 1,4-cyclohexanedicarboxylate), synthesized by mid-temperature hydrothermal method. Single crystal and powder X-ray diffraction data were acquired to confirm the structure and purity of these compounds, while the Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) was used to verify the accurate composition of luminescent centers. Quenching phenomena were observed in the emission decay curves of Tb3+ in these compounds as the addition of Sm3+. The emission decay curves of Tb3+ and Sm3+ in these coordination polymers were acquired and analyzed. The analysis shows two emission decay behaviors in both Tb3+ and Sm3+. The first is a Sm3+ concentration dependent fast decay, and the second is a concentration independent slow decay. We have adopted kinetics model that successfully analyzed these decay curves and obtained the related rate constants. The emission spectra of Sm3+ related compounds provides the possible factors that affect the decay curves.
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