期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 17, 期 18, 页码 5180-5187出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201003255
关键词
hydrogel; lanthanide; nanotubes; photoluminescence; self-assembly
资金
- Natural Science Foundation of China [20873001, 20633010, 50821061, 21073006]
- National Basic Research Program of China [2007CB936201]
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.
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