Luminescence of Lanthanide鈥揇imethyl Sulfoxide Compound Solutions

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• 作者：Mingzhen Yao ; Yuebin Li ; Marius Hossu ; Alan G. Joly ; Zhongxin Liu ; Zuli Liu ; Wei Chen
• 刊名：Journal of Physical Chemistry B
• 出版年：2011
• 出版时间：August 4, 2011
• 年：2011
• 卷：115
• 期：30
• 页码：9352-9359
• 全文大小：1148K
• 年卷期：v.115,no.30(August 4, 2011)
• ISSN：1520-5207

文摘

Dimethyl sulfoxide (DMSO) has the ability to penetrate living tissues without causing significant damage. Of foremost importance to our understanding of the possible functions of DMSO in biological systems is its ability to replace some of the water molecules associated with the cellular constituents or to affect the structure of the omnipresent water. Luminescence probes have been widely used for biological studies such as labeling, imaging, and detection. Luminescence probes formed in DMSO may find new applications. Here luminescence compounds formed by refluxing lanthanide nitrates of Ce, La, Tb, Yb, Nd, Gd, and Eu in DMSO are reported and their luminescence properties investigated. On the basis of their luminescence spectral properties, the compounds can be classified into four classes. For compounds I with Yb, Ce, and La, the excitation and emission spectra are very broad and their excitation or emission peaks are shifted to longer wavelengths when the monitored emission or excitation wavelength is longer. For compounds II with Gd and Nd, both the excitation and emission spectra are very broad but their emission wavelengths change little at different excitation wavelengths. For Tb鈥揇MSO as compound III, both the typical emissions from the f鈥揻 transitions of Tb³⁺ and a broad emission at 445 nm are observed. At low reaction temperatures, the f鈥揻 emissions are dominant, while at high reaction temperatures such as 180 掳C, the broad emission at 445 nm is dominant. For compound IV, Eu鈥揇MSO, the dominant emissions are from the f鈥揻 transitions of Eu³⁺ and only a weak broad emission is observed, which is likely from the d鈥揻 transition of Eu²⁺ rather than from metal-to-ligand charge transfer states.