Ln3+-mediated formation of luminescent ionogels
Ln3+-mediated formation of luminescent ionogels
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DOI：
10.1039/c2tc00625a
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发表时间：
2013-01
影响因子：
6.4
通讯作者：
Tingting Wen;Huanrong Li;Yige Wang;Lingyun Wang;Wenjun Zhang;Li Zhang
中科院分区：
文献类型：
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作者：
Tingting Wen;Huanrong Li;Yige Wang;Lingyun Wang;Wenjun Zhang;Li Zhang
合成了一种新的芳香族羧酸有机盐，能与Eu3+、Tb3+等镧系离子配位敏化。在MeOH、EtOH或DMF中加热有机盐和Eu3+（或Tb3+）离子的混合物，得到均质溶液。通过缓慢蒸发溶剂得到发光的电离层凝胶。然而，如果没有镧系离子或在制备过程中芳羧酸去质子化，则不能得到离子凝胶。含铕（III）离子凝胶和含铽（III）离子凝胶中EtOH的截留量分别为17%和22%。由于分子内能量从有机盐转移到镧系离子，得到的离子凝胶在紫外光照射下表现出强烈的发射谱线。
A new organic salt consisting of aromatic carboxylic acid that can coordinate to and sensitize lanthanide ions such as Eu3+ and Tb3+ ions has been synthesized. Heating the mixture of organic salt and Eu3+ (or Tb3+) ions in MeOH, EtOH or DMF results in a homogenous solution. Luminescent ionogels are obtained by slowly evaporating the solvents. However, ionogels cannot be obtained when lanthanide ions are absent or if the aromatic carboxylic acid is deprotonated during the preparation of the ionogels. The amount of entrapped EtOH in the ionogels is 17% and 22%, respectively, for europium(III)-containing ionogels and Tb(III)-containing ionogels, respectively. The obtained ionogels exhibit intense emission lines upon UV light irradiation, owing to intramolecular energy transfer from the organic salt to lanthanide ions.