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A direct approach to organic/inorganic semiconductor hybrid particles via functionalized polyfluorene ligands

A direct approach to organic/inorganic semiconductor hybrid particles via functionalized polyfluorene ligands

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DE ROO, Tjaard, Johannes HAASE, Janine KELLER, Christopher HINZ, Marius SCHMID, Denis V. SELETSKIY, Helmut CÖLFEN, Alfred LEITENSTORFER, Stefan MECKING, 2014. A direct approach to organic/inorganic semiconductor hybrid particles via functionalized polyfluorene ligands. In: Advanced Functional Materials. 24(18), pp. 2714-2719. ISSN 1616-301X. eISSN 1616-3028. Available under: doi: 10.1002/adfm.201304036

@article{deRoo2014direc-27644, title={A direct approach to organic/inorganic semiconductor hybrid particles via functionalized polyfluorene ligands}, year={2014}, doi={10.1002/adfm.201304036}, number={18}, volume={24}, issn={1616-301X}, journal={Advanced Functional Materials}, pages={2714--2719}, author={de Roo, Tjaard and Haase, Johannes and Keller, Janine and Hinz, Christopher and Schmid, Marius and Seletskiy, Denis V. and Cölfen, Helmut and Leitenstorfer, Alfred and Mecking, Stefan} }

2014-04-17T12:26:16Z Seletskiy, Denis V. Leitenstorfer, Alfred terms-of-use Controlled Suzuki–Miyaura coupling polymerization of 7′-bromo-9′,9′-dioctyl-fluoren-2′-yl-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane initiated by bromo(4-tert-butoxycarbonylamino-phenyl)(tri-tert-butylphosphine)palladium (1) or bromo(4-diethoxyphosphoryl-phenyl)(tri-tert-butylphosphine)palladium (2) yields functionalized polyfluorenes (M<sub>n</sub> = 4 × 10<sup>3</sup> g mol<sup>−1</sup>, M<sub>w</sub>/M<sub>n</sub> < 1.2) with a single amine or phosphonic acid, respectively, end-group. High temperature synthesis of cadmium selenide quantum dots with these functionalized polyfluorenes as stabilizing ligands yields hybrid particles consisting of good quality (e.g. emission full width at half maximum of 30 nm; size distribution σ < 10%) inorganic nanocrystals with polyfluorene attached to the surface, as corroborated by transmission electron microscopy analysis and analytical ultracentrifugation. Sedimentation studies on particle dispersions show that a substantial portion (ca. half) of the phosphonic acid terminated polyfluorene ligands is bound to the inorganic nanocrystals, versus ca. 5% for the amino-functionalized polyfluorene ligands. Single particle micro-photoluminescence spectroscopy shows an efficient and complete energy transfer from the polyfluorene layer to the inorganic quantum dot. A direct approach to organic/inorganic semiconductor hybrid particles via functionalized polyfluorene ligands Cölfen, Helmut Keller, Janine Mecking, Stefan Leitenstorfer, Alfred Seletskiy, Denis V. Keller, Janine 2014-04-17T12:26:16Z Cölfen, Helmut Schmid, Marius Hinz, Christopher 2014 eng de Roo, Tjaard de Roo, Tjaard Advanced Functional Materials ; 24 (2014), 18. - S. 2714-2719 Hinz, Christopher Haase, Johannes Haase, Johannes Schmid, Marius Mecking, Stefan

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