Anisotropic Polymer Nanoparticles with Tunable Emission Wavelengths by Intersegmental Chain Packing. Ruiz Perez, J. D. & Mecking, S. Angewandte Chemie International Edition, 56(22):6147–6151, 2017. _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201701000
Anisotropic Polymer Nanoparticles with Tunable Emission Wavelengths by Intersegmental Chain Packing [link]Paper  doi  abstract   bibtex   
The shape of nanoparticles is decisive for their self-assembly properties, as well as for the behavior of individual particles in many instances. The introduction and control of anisotropy is well-known for inorganic nanocrystals but a largely unresolved problem for polymer nanoparticles, especially for conjugated polymers. Here, we report a reproducible preparation method using heterophase polymerization for a range of stable dispersions of ellipsoidal conjugated polymer nanoparticles with sizes in the range of 50 to 180 nm and narrow size and shape distributions. The nanoparticles show a bright fluorescence with tunable emission wavelengths and quantum yields as high as ϕ=78 %. Structural investigations reveal the nanoparticles to be composed of a highly ordered β- and α′-phase within a nematic matrix. Preliminary studies on the origin of particle anisotropy suggest a concerted mechanism in which anisotropic shape evolves from intersegmental packing that occurs along with progressing chain formation by polymerization.
@article{ruizperez_anisotropic_2017,
	title = {Anisotropic {Polymer} {Nanoparticles} with {Tunable} {Emission} {Wavelengths} by {Intersegmental} {Chain} {Packing}},
	volume = {56},
	issn = {1521-3773},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201701000},
	doi = {10.1002/anie.201701000},
	abstract = {The shape of nanoparticles is decisive for their self-assembly properties, as well as for the behavior of individual particles in many instances. The introduction and control of anisotropy is well-known for inorganic nanocrystals but a largely unresolved problem for polymer nanoparticles, especially for conjugated polymers. Here, we report a reproducible preparation method using heterophase polymerization for a range of stable dispersions of ellipsoidal conjugated polymer nanoparticles with sizes in the range of 50 to 180 nm and narrow size and shape distributions. The nanoparticles show a bright fluorescence with tunable emission wavelengths and quantum yields as high as ϕ=78 \%. Structural investigations reveal the nanoparticles to be composed of a highly ordered β- and α′-phase within a nematic matrix. Preliminary studies on the origin of particle anisotropy suggest a concerted mechanism in which anisotropic shape evolves from intersegmental packing that occurs along with progressing chain formation by polymerization.},
	language = {en},
	number = {22},
	urldate = {2021-07-03},
	journal = {Angewandte Chemie International Edition},
	author = {Ruiz Perez, Julian D. and Mecking, Stefan},
	year = {2017},
	note = {\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201701000},
	keywords = {conjugated polymers, cross-coupling, fluorescence, nanoparticles, polymerization},
	pages = {6147--6151},
}

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