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Title: Aggregation-driven growth of size-tunable organic nanoparticles using electronically altered conjugated polymers
Authors: Wang, F.
Han, M.-Y. 
Mya, K.Y.
Wang, Y.
Lai, Y.-H. 
Issue Date: 27-Jul-2005
Citation: Wang, F., Han, M.-Y., Mya, K.Y., Wang, Y., Lai, Y.-H. (2005-07-27). Aggregation-driven growth of size-tunable organic nanoparticles using electronically altered conjugated polymers. Journal of the American Chemical Society 127 (29) : 10350-10355. ScholarBank@NUS Repository.
Abstract: A novel class of monodisperse conjugated polymer nanoparticles have been readily prepared by the facile reprecipitation of poly{1,3-bis[2-(3- alkylthienyl)]azulene} or poly{1,3-bis[2-(3-alkoxythienyl)]-azulene}. The multicomponent poly(bithiophene-alt-azulene) macromolecules were efficiently self-assembled into a wide range of size-tunable nanoparticles from a few tens to five hundred nanometers via the hydrophobic and π-stacking effects in the mixed chloroform/methanol solutions. Electronically altered polymer structures with different alkyl or alkoxy substitutes exhibited variable self-assembling behaviors to precisely tune the size and the optical/electronic properties of nanoparticles. A strong size dependence of continuous bathochromic absorption and significant enhanced emission were observed with the increase of particle size. A linear relationship between the absorption or fluorescence intensities and the particle size was demonstrated as well, and this is very useful to probe the intermolecular interactions and the size evolutions of conjugated polymer nanoparticles. After the size-dependent optical and electronic properties are created, they can be further optimized to improve the performance of materials prior to the use in novel organic nanodevices in a cost-effective way. © 2005 American Chemical Society.
Source Title: Journal of the American Chemical Society
ISSN: 00027863
DOI: 10.1021/ja0521730
Appears in Collections:Staff Publications

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