Single-component oligomer nanoparticle-based size-dependent dual-emission modulation

Liu, W., Sun, M., Yu, L., Song, X., Li, F., Lee, C.-S. and Roy, V.A.L. (2018) Single-component oligomer nanoparticle-based size-dependent dual-emission modulation. Journal of Physical Chemistry C, 122(8), pp. 4199-4205. (doi: 10.1021/acs.jpcc.7b12272)

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Multichromophoric oligomers offer a versatile platform for nanoparticle multicolor fluorescent modulation. A donor–acceptor–donor (D–A–D) type oligomer (DDBTD), with blue emitting antenna and red emitting core, is chosen to assemble into fluorescent colloidal nanoparticles (FCNs) using a nanoprecipitation method. By modulating the DDBTD concentrations in good solvent, the DDBTD nanoparticles with average diameters ranging from sub-10 to 300 nm are obtained by the nanoprecipitation process in aqueous solution. Interestingly, multicolor photoluminescence (PL) can be realized from bright blue (∼440 nm) to rose red (∼630 nm) based on FCNs size control. The size-dependent PL originates from the aggregation-enhanced fluorescence resonance energy transfer (FRET) from diphenyl-aminofluorenyl antenna unit (blue emitter) to benzothiadiazole-based core (red emitter). Furthermore, the lifetime measurement of the FCNs in excited state shows a size-dependent behavior, which confirms that the size-dependent multicolor PL modulation is adjusted by FRET in the nanoscale oligomer. This work highlights the potential of the single-component multichromophoric oligomer FCNs for luminescent modulation applications.

Item Type:Articles
Additional Information:The authors are deeply grateful to the National Natural Science Foundation of China (21274134) and the Hong Kong Scholar Program (XJ2012042, 2012T50630) for financial support. Mingliang Sun thanks Prof. Yong Cao at the South China University of Technology for providing the DDBTD material in this work.
Glasgow Author(s) Enlighten ID:Vellaisamy, Professor Roy
Authors: Liu, W., Sun, M., Yu, L., Song, X., Li, F., Lee, C.-S., and Roy, V.A.L.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Journal of Physical Chemistry C
Publisher:American Chemical Society
ISSN (Online):1932-7455
Published Online:20 February 2018

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