Lanthanide-Containing Photoluminescent Materials: From Hybrid Hydrogel to Inorganic Nanotubes
Lanthanide-Containing Photoluminescent Materials: From Hybrid Hydrogel to Inorganic Nanotubes
复制标题
含稀土发光材料：从混合水凝胶到无机纳米管
DOI：
10.1002/chem.201003255
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发表时间：
2011-04-01
影响因子：
4.3
通讯作者：
Huang, Jianbin
中科院分区：
文献类型：
--
作者：
Qiao, Yan;Lin, Yiyang;Huang, Jianbin
功能性光致发光材料是近年来发展起来的一种新型发光材料。本研究通过胆酸钠与稀土离子如Eu ~（3+）、Tb ~（3+）和Eu ~（3+）/Tb ~（3+）的超分子自组装，设计了有机-有机杂化发光水凝胶。荧光显微镜和透射电镜观察表明，杂化水凝胶中存在自发自组装的纳米纤维和三维网络。镧系离子通过与胆酸盐配位并组装成一维纳米纤维，成功地屏蔽了Eu 3+离子被水猝灭的现象，实现了其光致发光的增强。杂化水凝胶的光致发光发射强度表现出强烈的依赖于铕/胆酸盐的摩尔比，最大发射出现在1：3的化学计量比。此外，镧系元素-胆酸盐水凝胶的发光颜色可以通过使用不同的镧系离子或共掺杂离子来调节。此外，利用镧系元素-胆酸盐超分子水凝胶的自模板法合成了光致发光的镧系元素硫氧化物无机纳米管。据我们所知，这是第一次在温和的条件下在溶液中制备镧系氧硫化物无机纳米管。
Functional photoluminescent materials are emerging as a fascinating this work, luminescent organic-in-organic hybrid hydrogels are facilely designed through supramolecular self-assembly of sodium cholate, and lanthanide ions such as Eu3+, Tb3+, and Eu3+/Tb3+. Fluorescence microscopy and TEM visualization demonstrates the existence of spontaneously self-assembled nanofibers and 3D networks in hybrid hydrogel. Photoluminescence enhancement of lanthanide ions is realized through coordination with cholate and co-assembly into 1D nanofibers, which can successfully shield the Eu3+ from being quenched by water. The photoluminescence emission intensity of a hybrid hydrogel exhibits strong dependence on europium/cholate molar ratio, with maximum emission appearing at a stoichiometry of 1:3. Further-more, the emission color of a lanthanide-cholate hydrogel can be tuned by utilizing different lanthanide ions or co-doping ions. Moreover, photoluminescent lanthanide oxysulfide inorganic nanotubes are synthesized by means of a self-templating approach based on lanthanide-cholate supramolecular hydrogels. To the best of our knowledge, this is the first time that the lanthanide oxysulfide inorganic nanotubes are prepared in solution under mild conditions.