Emission spectra from the 5D1 excited state of the compounds containing Eu3+

Yu Ting Wang, Chih Yi Song, Kwang Hwa Lii, Bor Chen Chang

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Excitation, photoluminescence, and time-resolved emission spectra of the Eu3+-containing compounds, YxEu2-x(CHDC)3, Eu(NO3)3·5H2O, and Eu2O3 were obtained. The coordination polymers, R2(C8H10O4)3, (R = Eu or Y), were synthesized by mid-temperature hydrothermal technique with the 1,4-cyclohexanedicarboxylate (C8H10O4, CHDC) ligands. Blue-shift emission signals were observed in the emission spectra of these Eu3+-containing compounds at 561 nm excitation. Power dependence and temperature dependence experiments indicate the blue-shift emission results from one-photon hot band transition to the 5D1 excited state. The Eu3+ 5D17FJ emission decay curves and 5D07FJ emission rising curves of these compounds were acquired. The 5D1 state emission lifetimes are quite different in these compounds and are correlated with the 5D1 → 5D0 relaxation rates. Our analysis shows two possible (Eu3+-Eu3+ and Eu3+-CHDC) cross-relaxation processes that relax 5D1 to 5D0 with different rates in these compounds.

Original languageEnglish
Pages (from-to)34-41
Number of pages8
JournalJournal of the Chinese Chemical Society
Issue number1
StatePublished - Jan 2022


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