以光譜學方法研究含釔釤鋱配位聚合物內不同波長能量轉移之差別

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题名:	以光譜學方法研究含釔釤鋱配位聚合物內不同波長能量轉移之差別
作者:	林佩燁;Lin, Pei-Ye
贡献者:	化學學系
关键词:	三價鑭系元素;能量轉移
日期:	2023-08-10
上传时间:	2023-10-04 14:42:36 (UTC+8)
出版者:	國立中央大學
摘要:	本論文主要研究不同波長下含釔釤鋱之配位聚合物中能量轉移及淬熄機制。釔釤鋱配位聚合物是利用中溫水熱法合成，配位中心為不同比例之三價釤(Sm3+)、鋱(Tb3+)、釔(Y3+)，配位基為1,4-cyclohexanedicarboxylate (C8H10O4，簡稱CHDC)。本論文以激發光譜(excitation spectra)、光致放光光譜(photoluminescence emission spectra)、時間解析光譜(time-resolved spectra)、光功率依賴性(power dependence)等實驗探討釔釤鋱配位聚合物在不同激發波長下Tb3+和CHDC能量轉移給Sm3+的效率。實驗結果發現Y3+在此類化合物中隔絕能量傳導和可能產生Y2O3氧化物而顯著地影響能量傳導與淬熄過程。Tb3+在561 nm激發波長下可能有雙光子激發(two-photon absorption)。因Y2O3會影響Tb3+之激發效率，此外Sm2O3在不同波長下激發效率不同，因此在緩解過程中發生複雜的能量轉移及淬熄機制，造成此類化合物在不同波長下放光行為的差異。;This thesis investigates the energy transfer and quenching mechanisms of coordination polymers containing different compositions of trivalent samarium (Sm3+), terbium (Tb3+), and yttrium (Y3+) at various excitation wavelengths. These compounds have 1,4-cyclohexanedicarboxylate (C8H10O4, CHDC) as ligands and were synthesized using mid-temperature hydrothermal synthesis. This study acquired excitation spectra, photoluminescence emission spectra, time-resolved spectra, and power dependence measurements for studying the energy transfer and quenching efficiency of Tb3+ and CHDC to Sm3+ at various excitation wavelengths. The results indicate the existence of Y3+ in these compounds profoundly affects the energy transfer and quenching processes due to the energy transfer blocking of Y3+ and the possible formation of Y2O3. Tb3+ could be excited by two-photon absorption at 561 nm, and the excitation efficiency of Tb3+ is significantly affected by the existence of Y2O3. In addition, the excitation efficiency of Sm2O3 is different at various excitation wavelengths. The following energy relaxation involves complicated energy transfer and quenching mechanisms. These results in the different emission behaviors of these compounds at various excitation wavelengths.
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