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Title: Iron(III)-quantity-dependent aggregation-dispersion conversion of functionalized gold nanoparticles
Authors: Bai, Linyi
Zhu, Liangliang
Ang, Chung Yen
Li, Xin
Wu, Shaojue
Zeng, Yongfei
Ågren, Hans
Zhao, Yanli
Keywords: DRNTU::Engineering::Materials::Nanostructured materials
Issue Date: 2014
Source: Bai, L., Zhu, L., Ang, C. Y., Li, X., Wu, S., Zeng, Y., et al. (2014). Iron(III)-quantity-dependent aggregation-dispersion conversion of functionalized gold nanoparticles. Chemistry - A European Journal, 20(14), 4032-4037.
Series/Report no.: Chemistry - a European journal
Abstract: Developing gold nanoparticles (AuNPs) with well-designed functionality is highly desirable for boosting the performance and versatility of inorganic–organic hybrid materials. In an attempt to achieve ion recognition with specific signal expressions, we present here 4-piperazinyl-1,8-naphthalimide-functionalized AuNPs for the realization of quantitative recognition of FeIII ions with dual (colorimetric and fluorescent) output. The research takes advantage of 1) quantity-controlled chelation-mode transformation of the piperazinyl moiety on the AuNPs towards FeIII, thereby resulting in an aggregation–dispersion conversion of the AuNPs in solution, and 2) photoinduced electron transfer of a naphthaimide fluorophore on the AuNPs, thus leading to reversible absorption and emission changes. The functional AuNPs are also responsive to pH variations. This strategy for realizing the aggregation–dispersion conversion of AuNPs with returnable signal output might exhibit application potential for advanced nanoscale chemosensors.
ISSN: 0947-6539
DOI: 10.1002/chem.201303958
Rights: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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