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Open AccessReview

Reduction of Tetrachloroaurate(III) Ions With Bioligands: Role of the Thiol and Amine Functional Groups on the Structure and Optical Features of Gold Nanohybrid Systems

1
Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, H-6720 Rerrich B. square 1, Szeged, Hungary
2
MTA-SZTE Biomimetic Systems Research Group, Department of Medical Chemistry, University of Szeged, H-6720 Dóm square 8, Szeged, Hungary
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(9), 1229; https://doi.org/10.3390/nano9091229
Received: 23 July 2019 / Revised: 25 August 2019 / Accepted: 26 August 2019 / Published: 29 August 2019
In this review, the presentation of the synthetic routes of plasmonic gold nanoparticles (Au NPs), fluorescent gold nanoclusters (Au NCs), as well as self-assembled Au-containing thiolated coordination polymers (Au CPs) was highlighted. We exclusively emphasize the gold products that are synthesized by the spontaneous interaction of tetrachloroaurate(III) ions (AuCl4¯) with bioligands using amine and thiolate derivatives, including mainly amino acids. The dominant role of the nature of the applied reducing molecules as well as the experimental conditions (concentration of the precursor metal ion, molar ratio of the AuCl4¯ ions and biomolecules; pH, temperature, etc.) of the syntheses on the size and structure-dependent optical properties of these gold nanohybrid materials have been summarized. While using the same reducing and stabilizing biomolecules, the main differences on the preparation conditions of Au NPs, Au NCs, and Au CPs have been interpreted and the reducing capabilities of various amino acids and thiolates have been compared. Moreover, various fabrication routes of thiol-stabilized plasmonic Au NPs, as well as fluorescent Au NCs and self-assembled Au CPs have been presented via the formation of (Au(I)-SR)n periodic structures as intermediates. View Full-Text
Keywords: gold nanoparticles; gold nanoclusters; coordination polymer structure; amino acids; template-assisted synthesis; fluorescence; Au(I)-thiolate; gold nanohybrid materials gold nanoparticles; gold nanoclusters; coordination polymer structure; amino acids; template-assisted synthesis; fluorescence; Au(I)-thiolate; gold nanohybrid materials
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MDPI and ACS Style

Ungor, D.; Dékány, I.; Csapó, E. Reduction of Tetrachloroaurate(III) Ions With Bioligands: Role of the Thiol and Amine Functional Groups on the Structure and Optical Features of Gold Nanohybrid Systems. Nanomaterials 2019, 9, 1229.

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