以光譜學方法研究含鋱配位聚合物之淬熄機制

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题名:	以光譜學方法研究含鋱配位聚合物之淬熄機制
作者:	陳冠輝;Chen, Guan-Hui
贡献者:	化學學系
关键词:	光譜學方法;鋱;淬熄機制;spectroscopic study;terbium;quenching mechanisms
日期:	2018-07-24
上传时间:	2018-08-31 11:33:00 (UTC+8)
出版者:	國立中央大學
摘要:	本論文利用中溫水熱法合成以1,4-cyclohexanedicarboxylate (C8H10O4, CHDC)作為配位基，含有不同莫耳比例釔鋱之R2(CHDC)3配位聚合物晶體(R= Y, Tb)。合成後的晶體以粉末X光繞射(powder X-ray diffraction, PXRD)確認晶體的晶相與純度。本論文量測了一系列不同比例鋱之配位聚合物的光致放光光譜(photoluminescence spectra)、時間解析光譜(time-resolved spectra)以及激發光譜(excitation spectra)，利用上述這些光譜技術來分析YxTb2-x(CHDC)3與Tb2(CHDC)3樣品，發現這些樣品當中並不存在濃度淬熄效應(concentration quenching)；同時量測與Tb3+有關的物質之光致放光光譜與時間解析光譜，進而推測造成YxTb2-x(CHDC)3與Tb2(CHDC)3樣品差異性的可能來源。此外，也探討YxTb2-x(CHDC)3樣品在不同激發波長下有不同Tb3+放光衰退行為的可能原因。;Mid-temperature hydrothermal method was adopted to synthesize the coordination polymers with 1,4-cyclohexanedicarboxylate (C8H10O4, CHDC) ligands and different compositions of Y3+ and Tb3+ as the coordination center. These compounds were analyzed by powder X-ray diffraction to confirm their structure and purity. The photoluminescence, excitation, and time-resolved spectra of these compounds such Tb2(CHDC)3 and YxTb2-x(CHDC)3 were recorded and the emission decay curves of Tb3+ in these compounds were analyzed. The results show no concentration quenching phenomenon in these compounds, but there exist profound differences between Tb2(CHDC)3 and YxTb2-x(CHDC)3. Furthermore, different excitation wavelengths also exhibit different emission decay rates. Possible factors for explaining these differences were investigated.
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