Negele Carla, Haase Johannes, Leitenstorfer Alfred, Mecking Stefan
Chair of Chemical Materials Science, Department of Chemistry, and ‡Department of Physics and Center for Applied Photonics, University of Konstanz, Universitaetsstrasse 10, D-78457 Konstanz, Germany.
Chair of Chemical Materials Science, Department of Chemistry, and Department of Physics and Center for Applied Photonics, University of Konstanz, Universitaetsstrasse 10, D-78457 Konstanz, Germany.
ACS Macro Lett. 2012 Nov 20;1(11):1343-1346. doi: 10.1021/mz300427d. Epub 2012 Nov 1.
Suzuki-Miyaura polycondensation of 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-7-bromo-9,9-dioctylfluorene in aqueous miniemulsion with only two equivalents of NaOH as a base yields colloidally stable nanoparticles of polyfluorene with ca. 2 × 10 g mol and particle sizes of 40-85 nm, depending on the surfactant concentration. Polymerization in the presence of CdSe/CdS core/shell quantum dots affords hybrid nanoparticles of nonaggregated quantum dots, in particular nanoparticles composed of a single quantum dot embedded in a polyfluorene shell. Microphotoluminescence spectroscopy on single hybrid particles reveals an enhanced photostability of the quantum dots and indicates an efficient Förster energy transfer from the polyfluorene shell to the quantum dot.
在水相微乳液中，以仅两当量的氢氧化钠作为碱，使2-(4,4,5,5-四甲基-1,3,2-二氧硼杂环戊烷-2-基)-7-溴-9,9-二辛基芴进行铃木-宫浦缩聚反应，可得到具有约2×10 g/mol且粒径为40 - 85 nm的聚芴胶体稳定纳米颗粒，其粒径大小取决于表面活性剂浓度。在CdSe/CdS核/壳量子点存在下进行聚合反应，可得到非聚集量子点的杂化纳米颗粒，特别是由嵌入聚芴壳中的单个量子点组成的纳米颗粒。对单个杂化颗粒进行微光致发光光谱分析，结果显示量子点的光稳定性增强，这表明存在从聚芴壳到量子点的高效福斯特能量转移。
