Jump to main content
Jump to site search

Issue 1, 2017
Previous Article Next Article

Exploring the potential of linear polymer structures for the synthesis of fluorescent gold nanoclusters

Author affiliations

Abstract

In this study, fluorescent gold nanoclusters (AuNCs) were synthesized via the one-pot reduction of gold ions (Au3+) in the presence of thiolated copolymers. Well-defined copolymers, which are comprised of oligo(ethylene glycol) methyl ether methacrylate (OEGMA) and 2-(acetylthio)ethyl methacrylate (AcSEMA) monomers in either a block or random structure, were prepared via reversible addition–fragmentation chain transfer (RAFT) polymerization. Following deprotection of the AcSEMA thioester pendant group to yield a thiol, the formation of gold nanoclusters was performed at various relative molar concentrations of thiol to gold ions in order to investigate the effect on the fluorescent properties. Random copolymer stabilized gold nanoclusters (R@AuNCs) displayed higher emission intensity in comparison to block copolymer stabilized gold nanoclusters (B@AuNCs). In aqueous media, the hydrodynamic diameter of B@AuNCs (10.4–13.4 nm) were relatively larger compared to the R@AuNCs (5.9–6.6 nm) as determined by dynamic light scattering (DLS). However, the AuNCs cores were estimated to be similar in size according to the Jellium model (≅0.49 nm, ∼Au25), indicating the negligible effect of different polymer structure on the size of the fluorescent AuNCs core. Interestingly, these nanoclusters displayed linear temperature-dependent fluorescence emission intensity (≅0.7% °C−1) which may be important in biosensing applications.

Graphical abstract: Exploring the potential of linear polymer structures for the synthesis of fluorescent gold nanoclusters

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 28 Jun 2016, accepted on 02 Aug 2016 and first published on 17 Aug 2016


Article type: Research Article
DOI: 10.1039/C6QM00109B
Citation: Mater. Chem. Front., 2017,1, 80-90
  •   Request permissions

    Exploring the potential of linear polymer structures for the synthesis of fluorescent gold nanoclusters

    N. N. M. Adnan, S. Ahmad, R. P. Kuchel and C. Boyer, Mater. Chem. Front., 2017, 1, 80
    DOI: 10.1039/C6QM00109B

Search articles by author