Luminescent Polymeric Dispersions and Films Based on Oligonuclear Lanthanide Clusters
Luminescent Polymeric Dispersions and Films Based on Oligonuclear Lanthanide Clusters
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DOI：
10.1002/macp.201000461
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发表时间：
2011-02
影响因子：
2.5
通讯作者：
Christoph P. Hauser;D. Thielemann;M. Adlung;C. Wickleder;P. Roesky;C. Weiss;K. Landfester
中科院分区：
文献类型：
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作者：
Christoph P. Hauser;D. Thielemann;M. Adlung;C. Wickleder;P. Roesky;C. Weiss;K. Landfester
采用细乳液聚合法成功地将不同数量和类型的疏水性稀土团簇（Ln = Y，Pr，Eu，Sm，Nd）包埋在各种聚合物基体中。通过光子交叉相关光谱（PCCS）和透射电子显微镜（TEM）研究，所得到的簇-聚合物混合纳米颗粒是球形的，并且具有窄的尺寸分布。通过电感耦合等离子体发射光谱法（ICP-OES）示例性地研究了含Eu和Nd的聚合物分散体的纳米颗粒中的确切Ln含量。由于包封，超过1000 mg · L− 1的疏水Ln-簇成功分散在水中。乳液的水物理性质表明，成功地避免了水从附近的集群。此外，在分散体中可以观察到从配体和聚合物单元到Eu 3+离子的非常有效的能量转移。基于不同的玻璃化转变温度（Tg）的应用聚合物，单层的纳米粒子和高效的发光聚合物薄膜，通过旋涂获得。
The successful embedding of different amounts and types of hydrophobic rare earth clusters (Ln = Y, Pr, Eu, Sm, Nd) in various polymer matrices via miniemulsion polymerization is presented. The resulting cluster‐polymer hybrid nanoparticles are spherical in shape and possess a narrow size distribution, as investigated by photon cross correlation spectroscopy (PCCS) and transmission electron microscopy (TEM). The exact Ln‐content in the nanoparticles is exemplarily investigated for Eu‐ and Nd‐containing polymer dispersions via inductively coupled plasma‐optical emission spectrometry (ICP‐OES). As a result of encapsulation more than 1000 mg · L−1of the hydrophobic Ln‐cluster are successfully dispersed in water. The photophysical properties of the emulsion show the successful avoidance of water from the vicinity of the clusters. Furthermore, a very efficient energy transfer from the ligand and polymeric unit to Eu3+ions can be observed in dispersion. Based on the different glass transition temperatures (Tg) of the applied polymers, monolayers of the nanoparticles and efficient luminescent thin polymer films are obtained by spin coating.