Transparent dispersions of hydrophobic SrF₂ : Eu³⁺ nanoparticles in cyclohexane with up to 20% europium were obtained by fluorolytic sol‐gel synthesis followed by phase transfer into cyclohexane through capping with sodium dodecylbenzenesulfonate (SDBS). The particles were characterized by TEM, XRD and DLS as spherical objects with a diameter between 6 and 11 nm in dry state. ¹H‐¹³CP MAS NMR experiments revealed the binding of the anionic sulfonate head group to the particle surface. The particles show bright red luminescence upon excitation of the aromatic capping agents, acting as antennas for an energy transfer from the benzenesulfonate unit to the Eu³⁺ centers in the particles. This synthesis method overcomes the current obstacle of the fluorolytic sol‐gel synthesis that transparent dispersions can be obtained directly only in hydrophilic solvents. To demonstrate the potential of such hydrophobized alkaline‐earth fluoride particles, transparent luminescent organic‐inorganic composites with 10% SrF₂ : Eu³⁺ embedded into polyTEGDMA, polyBMA, polyBDDMA and polyD3MA, respectively, were prepared, endowing the polymers with the luminescence features of the nanoparticles.

中文翻译：

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通过疏水天线配体包覆SrF2：Eu3 +纳米粒子的相转移制备发光复合材料。

通过氟化溶胶-凝胶合成，然后通过用十二烷基苯磺酸钠（SDBS）封端，将疏水性SrF ₂  ：Eu ³⁺纳米粒子在含20％cyclo的环己烷中制成透明分散体，然后将其相转移到环己烷中。通过TEM，XRD和DLS将颗粒表征为干燥状态下直径为6-11nm的球形物体。¹ H- ¹³ CP MAS NMR实验揭示了阴离子磺酸根头基与颗粒表面的结合。激发芳族封端剂后，该颗粒显示亮红色发光，充当从苯磺酸盐单元到Eu ³⁺的能量转移的天线中心在粒子中。这种合成方法克服了目前氟代溶胶凝胶合成的障碍，即仅在亲水性溶剂中才能直接获得透明分散体。为了证明这种疏水化碱土金属氟化物颗粒的潜力，制备了分别嵌入到polyTEGDMA，polyBMA，polyBDDMA和polyD3MA中的含10％SrF ₂  ：Eu ^3+的透明发光有机-无机复合物，使聚合物具有发光特性纳米粒子。