Department of Chemistry, Tongji University, Shanghai, China.
Photochem Photobiol. 2013 Sep-Oct;89(5):1262-8. doi: 10.1111/php.12125. Epub 2013 Aug 5.
Rare earth doped fluorides (BaMgF4, aYF4 and BaYF5/BaLuF5) have been synthesized and dispersed in an ionic liquid compound, (3-triethoxysilyl) propyl-3-methylimidazolium chloride (denoted as IM(+)Cl(-)). Through the cohydrolysis and copolycondensatoin reaction between the alkoxy group (3-triethoxysilyl) of IM(+) and tetraethoxysilane in the presence of carboxylic acids (formic acid) as catalyst and water source, luminescent hybrid ionogels form subsequently. (1)H NMR spectroscopy, X-ray diffraction, transmission electron microscopy, scanning electron microscopy and especially up-conversion (UC) luminescence spectroscopy are used to characterize the precursors and the resulted hybrid ionogels. These hybrid ionogels exhibit the UC luminescence properties of immobilized rare earth fluoride nanocrystals (BaMgF4, NaYF4 and BaYF5/BaLuF5) doped Er(3+)/Tm(3+), Yb(3+).
掺稀土氟化物（BaMgF4、aYF4 和 BaYF5/BaLuF5）已被合成并分散在离子液体化合物（3-三乙氧基硅丙基-3-甲基咪唑氯化物（表示为 IM(+)Cl(-)））中。通过 IM(+)的烷氧基（3-三乙氧基硅丙基）与四乙氧基硅烷在羧酸（甲酸）作为催化剂和水的存在下的共水解和共聚缩合反应，随后形成发光杂化离子凝胶。使用 (1)H NMR 光谱、X 射线衍射、透射电子显微镜、扫描电子显微镜和上转换（UC）发光光谱来表征前体和所得的杂化离子凝胶。这些杂化离子凝胶表现出固定化稀土氟化物纳米晶体（BaMgF4、NaYF4 和 BaYF5/BaLuF5）掺杂 Er(3+) /Tm(3+)、Yb(3+) 的 UC 发光特性。
