Ren Ting, Mandal Prasun K, Erker Wolfgang, Liu Zhihong, Avlasevich Yuri, Puhl Larissa, Müllen Klaus, Basché Thomas
Institut für Physikalische Chemie, Johannes Gutenberg-Universität Mainz, Welderweg 11, 55099 Mainz, Germany.
J Am Chem Soc. 2008 Dec 24;130(51):17242-3. doi: 10.1021/ja8073962.
Hybrid systems consisting of core/shell semiconductor quantum dots (QDs) and organic rylene dyes have been prepared and characterized. Complex formation is mediated by bidentate carboxylate moieties covalently linked to the dye molecules. The complexes were very stable with respect to time (at least months), dilution (sub nM), and precipitation. After preparation in organic solvent, complexes could be easily transferred into water. The strong quenching of QD emission by the dye molecules (transfer efficiencies up to 95%) was satisfactorily modeled by an FRET process. Single complexes immobilized in thin polymer films were imaged by confocal fluorescence microscopy.
由核壳半导体量子点（QD）和有机苝染料组成的混合系统已被制备并表征。配合物的形成是由与染料分子共价连接的双齿羧酸盐部分介导的。这些配合物在时间（至少数月）、稀释（亚纳摩尔）和沉淀方面非常稳定。在有机溶剂中制备后，配合物可以很容易地转移到水中。染料分子对量子点发射的强烈猝灭（转移效率高达95%）通过荧光共振能量转移（FRET）过程得到了令人满意的模拟。固定在聚合物薄膜中的单个配合物通过共聚焦荧光显微镜成像。
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