Uniform composition film of hydrophilic colloidal gold nanoparticles and hydrophobic carbazole functionalized fluorene trimers for enhanced fluorescence and stabilityReport as inadecuate




Uniform composition film of hydrophilic colloidal gold nanoparticles and hydrophobic carbazole functionalized fluorene trimers for enhanced fluorescence and stability - Download this document for free, or read online. Document in PDF available to download.

Chinese Science Bulletin

, Volume 58, Issue 22, pp 2741–2746

First Online: 15 June 2013Received: 04 January 2013Accepted: 21 February 2013DOI: 10.1007-s11434-013-5869-0

Cite this article as: Liu, L., Xie, Z. & MA, Y. Chin. Sci. Bull. 2013 58: 2741. doi:10.1007-s11434-013-5869-0

Abstract

Compositing gold nanoparticles into conjugated molecules have been developed to be one of the most important approaches to increase stability, since degradation of conjugated materials is now one of the biggest bottle-necks to be conquered before industrialization application. Big-size colloidal gold nanoparticles with strong surface plasma resonance are designed to composite with conjugated molecules, in order to realize effective fluorescence enhancement and stabilization. The uniform composition film of hydrophilic colloidal gold nanoparticles particle diameter of 30 nm and hydrophobic carbazole functionalized fluorene trimers has been obtained by direct mixing of their aqueous and THF solutions, which is determined by AFM. By the comparison of composition based on fluorene trimers with similar structures, we have found that peripheral carbazole group and molecular size of fluorene trimers play an important role in the balance of incompatible solubility, which is regarded as increasing solubility of fluorene trimers in mixed solvent, connecting AuNP and peripheral carbazole groups, and restraining aggregate of gold nanoparticle. This allows facile hydrophilic gold nanoparticle to disperse uniformly in hydrophobic π-conjugated host. Our investigations show that fluorescence intensity of composition film is enhanced by 4 folds, and heat treatment 200°C for 4 h for the composition film does not induce the degradation of conjugated backbone without the appearance of low-energy emission band, demonstrating the prominent potency of gold nanoparticles in enhanced fluorescence and stability of conjugated molecules and polymers.

Keywordsconjugated polymer gold nanoparticle enhanced fluorescence stability This article is published with open access at Springerlink.com

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Author: LinLin Liu - ZengQi Xie - YuGuang MA

Source: https://link.springer.com/



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