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Gold

goldZum Golde drängt, am Golde hängt doch alles.
For gold contend, On gold depend All things.

J. W. Goethe, Faust I

The element gold has many personalities, of which the image of a noble but soft, yellow metal would first across one's mind. The recently discovered nanoparticles and nanowires containing gold are a natural extension of this aspect, as are the uses of gold in electronics and decoration. Thought to be noble, gold actually has a rich chemistry. Fascinating in its complexity for academic chemists, this chemistry has potential applications in materials science, medicine and, recently, in both heterogeneous and homogeneous catalysis. Some fresh promises are related to the optical properties of certain gold compounds or to the possibility of forming new nanostructures based on gold. The unique properties of gold are strongly influenced by relativistic effects.

[1] P. Pyykkö, Theoretical Chemistry of Gold
Angew. Chem. 2004, 116, 4512–4557; Angew. Chem. Int. Ed. 2004, 43, 4412–4456

[2] A. S. K. Hashmi, The Catalysis Gold Rush: New Claims
Angew. Chem. 2005, 117, 7150; Angew. Chem. Int. Ed. 2005, 44, 6990

[3] G. Schmid, B. Corain, Nanoparticulated Gold: Syntheses, Structures, Electronics, and Reactivities
Eur. J. Inorg. Chem. 2003, 3081

Recent Articles

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α-Radical Phosphines: Synthesis, Structure, and Reactivity

α‐Radical Phosphines: Synthesis, Structure, and Reactivity

That's radical! A series of α-radical phosphines stabilized by a cyclic (alkyl)(amino)carbene moiety were synthesized, their structures elucidated, and coordination complexes with gold(I) centers prepared. DFT calculations reveal that spin density is delocalized in the carbene π-system of both the phosphine ligands and their gold complexes, and is largest at the formerly carbene carbon atom.

[Communication]
Lianghu Gu, Yiying Zheng, Estela Haldón, Richard Goddard, Eckhard Bill, Walter Thiel, Manuel Alcarazo
Angew. Chem. Int. Ed., June 23, 2017, https://doi.org/10.1002/anie.201704185 Read article

Understanding the Mechanisms of Gold Shell Growth onto Polymer Microcapsules to Control Shell Thickness

Understanding the Mechanisms of Gold Shell Growth onto Polymer Microcapsules to Control Shell Thickness

On the road to cost-efficient gold shells! To create a gold-coated polymer microcapsule, platinum nanoparticles are the key to spatially locating the gold onto the polymer surface. This work explores ways to control nanoparticle adsorption on a microcapsule surface and how this affects growth of the gold shell. We present mechanisms describing metal shell growth with a view to obtaining the thinnest shells possible without sacrificing performance.

[Full Paper]
Alison L. Tasker, James Hitchcock, Elaine A. Baxter, Dr Olivier J. Cayre, Simon Biggs
Chem. Asian J., June 21, 2017, https://doi.org/10.1002/asia.201700536 Read article

Polyadenine-Modulated DNA Conformation Monitored by Surface-Enhanced Raman Scattering (SERS) on Multibranched Gold Nanoparticles and Its Sensing Application

Polyadenine‐Modulated DNA Conformation Monitored by Surface‐Enhanced Raman Scattering (SERS) on Multibranched Gold Nanoparticles and Its Sensing Application

Detecting DNA: Modulation of the DNA conformation on the surface of multibranched gold nanoparticles is realized by regulating the polyadenine length and/or DNA hybridization (see figure), which can be monitored in situ by surface-enhanced Raman scattering (SERS).

[Full Paper]
Jingxing Guo, Yunlong Chen, Yongjia Jiang, Huangxian Ju
Chem. Eur. J., June 20, 2017, https://doi.org/10.1002/chem.201700883 Read article

3D Atomic-Scale Insights into Anisotropic Core–Shell-Structured InGaAs Nanowires Grown by Metal–Organic Chemical Vapor Deposition

3D Atomic‐Scale Insights into Anisotropic Core–Shell‐Structured InGaAs Nanowires Grown by Metal–Organic Chemical Vapor Deposition

Spontaneous core–shell InGaAs nanowires are grown by metal–organic chemical vapor deposition and investigated with atom probe tomography, transmission electron microscopy, and density functional theory. The results reveal that a Ga-rich core coarsens from hexagonal to triangular due to species uphill interdiffusion, and an In-rich shell is owing to a surface catalyst effect, interdiffusion, and low formation energy. A hexagonal-shaped shell results from anisotropic growth on a {112}A and B facet.

[Communication]
Jiangtao Qu, Sichao Du, Tim Burgess, Changhong Wang, Xiangyuan Cui, Qiang Gao, Weichao Wang, Hark Hoe Tan, Hui Liu, Chennupati Jagadish, Yingjie Zhang, Hansheng Chen, Mansoor Khan, Simon Ringer, Rongkun Zheng
Adv. Mater., June 19, 2017, https://doi.org/10.1002/adma.201701888 Read article

A Simple, Efficient and Ultrasensitive Gold Nanourchin Based Electrochemical Sensor for the Determination of an Antimalarial Drug: Mefloquine

A Simple, Efficient and Ultrasensitive Gold Nanourchin Based Electrochemical Sensor for the Determination of an Antimalarial Drug: Mefloquine

[Full Paper]
Tirivashe Elton Chiwunze, Neeta Bachheti Thapliyal, Venkata Narayana Palakollu, Rajshekhar Karpoormath
Electroanalysis, June 13, 2017, https://doi.org/10.1002/elan.201700154 Read article

Modulation of Wetting Gradients by Tuning the Interplay between Surface Structuration and Anisotropic Molecular Layers with Bipolar Electrochemistry

Modulation of Wetting Gradients by Tuning the Interplay between Surface Structuration and Anisotropic Molecular Layers with Bipolar Electrochemistry

Slippery slope: The combination of surface structuration and molecular layers allows the preparation of tunable surface gradients. Wetting is modulated by reductive desorption of layers by means of bipolar electrochemistry (see figure).

[Article]
Laurent Bouffier, Stéphane Reculusa, Valérie Ravaine, Alexander Kuhn
ChemPhysChem, June 13, 2017, https://doi.org/10.1002/cphc.201700398 Read article

Measuring Temperature Change at the Nanometer Scale on Gold Nanoparticles by Using Thermoresponsive PEGMA Polymers

Measuring Temperature Change at the Nanometer Scale on Gold Nanoparticles by Using Thermoresponsive PEGMA Polymers

Gold–PEGMA platforms are fabricated to measure the temperature (28–90 °C) generated on Au surfaces by using different laser power densities with varying durations. By conjugating PEGMA (poly(ethylene glycol) methylether methacrylate) polymers with different lower critical solution temperature (LCST) values onto Au nanoparticles, the hydrodynamic diameter change of these systems at precise temperatures can be easily monitored by using dynamic light scattering (DLS).

[Full Paper]
Mustafa S. Yavuz, Murat Citir, Halit Cavusoglu, Gokhan Demirel
ChemNanoMat, June 13, 2017, https://doi.org/10.1002/cnma.201700081 Read article

Catalytic Au Wool-Ball-Shaped Nanostructures

Catalytic Au Wool‐Ball‐Shaped Nanostructures

Catalytic Au nanowool balls: Gold nanoparticles with a wool-ball surface morphology exhibit remarkable structural and catalytic properties. Size and structural modulation of the particles were accomplished through the tuning of the concentration of the gold complex and addition of small amounts of organic solvents. The Au nanowool balls were used as effective catalysts for methanol oxidation and nitrophenol reduction.

[Full Paper]
Xiuxiu Yin, Nagappa L. Teradal, Ahiud Morag, Raz Jelinek
ChemCatChem, June 13, 2017, https://doi.org/10.1002/cctc.201700459 Read article

Synthesis of Photocrosslinkable and Amine Containing Multifunctional Nanoparticles via Polymerization-Induced Self-Assembly

Synthesis of Photocrosslinkable and Amine Containing Multifunctional Nanoparticles via Polymerization‐Induced Self‐Assembly

Photo-crosslinkable and amine containing block copolymer nanoparticles are synthesized via RAFT polymerization-induced self-assembly and stabilized by photo-crosslinking. The crosslinked block copolymer nanoparticles can be used as stable templates for in situ formation of polymer/gold hybrid nanoparticles.

[Communication]
Jianbing Huang, Decai Li, Hui Liang, Jiang Lu
Macromol. Rapid Commun., June 12, 2017, https://doi.org/10.1002/marc.201700202 Read article

Peptide-FlgA3-Based Gold Palladium Bimetallic Nanoparticles That Catalyze the Oxygen Reduction Reaction in Alkaline Solution

Peptide‐FlgA3‐Based Gold Palladium Bimetallic Nanoparticles That Catalyze the Oxygen Reduction Reaction in Alkaline Solution

Alloys on my mind: Peptide-FlgA3-based AuPd bimetallic nanoparticles are fabricated and employed as an efficient electrocatalyst for the oxygen reduction reaction (ORR) in alkaline solution. The sample with a Au/Pd ratio of 1:2 exhibits the best activity, with an ORR performance comparable with that of Pt/C and a markedly higher long-term stability than Pt/C. These findings can pave the way for the fabrication of bimetallic nanoparticles with enhanced electrocatalytic properties under mild conditions.

[Full Paper]
Dongliang Li, Zhenghua Tang, Shaowei Chen, Yong Tian, Xiufang Wang
ChemCatChem, June 12, 2017, https://doi.org/10.1002/cctc.201700299 Read article

Electrochemiluminescence Immunosensor Based on Functionalized Graphene/Fe3O4-Au Magnetic Capture Probes for Ultrasensitive Detection of Tetrodotoxin

Electrochemiluminescence Immunosensor Based on Functionalized Graphene/Fe3O4‐Au Magnetic Capture Probes for Ultrasensitive Detection of Tetrodotoxin

[Full Paper]
Fang Shang, Yuan Liu, Sui Wang, Yufang Hu, Zhiyong Guo
Electroanalysis, June 08, 2017, https://doi.org/10.1002/elan.201700223 Read article

Mercury-modified Lignosulfonate-stabilized Gold Nanoparticles as an Alternative Material for Anodic Stripping Voltammetry of Thallium

Mercury‐modified Lignosulfonate‐stabilized Gold Nanoparticles as an Alternative Material for Anodic Stripping Voltammetry of Thallium

[Full Paper]
Bożena Karbowska, Tomasz Rębiś, Grzegorz Milczarek
Electroanalysis, June 08, 2017, https://doi.org/10.1002/elan.201700090 Read article

Enhanced Solar Water Splitting by Swift Charge Separation in Au/FeOOH Sandwiched Single-Crystalline Fe2O3 Nanoflake Photoelectrodes

Enhanced Solar Water Splitting by Swift Charge Separation in Au/FeOOH Sandwiched Single‐Crystalline Fe2O3 Nanoflake Photoelectrodes

Flake news: FeOOH and Au layers on single-crystalline α-Fe2O3 nanoflake photoanodes display a synergistic effect in water splitting. Au seeding provides nucleation centers to grow high-density hematite nanoflake arrays on Fe substrate. Additional FeOOH decoration facilitates hole transfer at the electrode/electrolyte interface, while the remaining Au underlayer provides a sink for electron transport to the back contact, leading to drastically improved charge-separation efficiency.

[Communication]
Lei Wang, Nhat Truong Nguyen, Yajun Zhang, Yingpu Bi, Patrik Schmuki
ChemSusChem, June 08, 2017, https://doi.org/10.1002/cssc.201700522 Read article

Oxidation of D-Glucose to Glucaric Acid Using Au/C Catalysts

Oxidation of D‐Glucose to Glucaric Acid Using Au/C Catalysts

From wood to polymers with gold: Carbon-supported gold nanoparticles are highly active in the direct oxidation of glucose to glucaric acid, an intermediate in the synthesis of biobased adipic acid. The catalyst outperforms Pt/C catalysts in both glucose/metal ratio and reaction conditions.

[Full Paper]
Stefania Solmi, Calogero Morreale, Francesca Ospitali, Stefano Agnoli, Fabrizio Cavani
ChemCatChem, June 08, 2017, https://doi.org/10.1002/cctc.201700089 Read article

Template- and Additive-free Electrosynthesis and Characterization of Spherical Gold Nanoparticles on Hydrophobic Conducting Polydimethylsiloxane

Template‐ and Additive‐free Electrosynthesis and Characterization of Spherical Gold Nanoparticles on Hydrophobic Conducting Polydimethylsiloxane

Feel the triple pulse: A triple-potentiometric pulse approach is presented for the synthesis of stabilizer-free gold nanoparticles on soft conductive carbon-modified PDMS without any physical or chemical pre-treatment steps. The seed growth mechanism is investigated along with the electrochemical behavior. This promising substrate is also thoroughly characterized by electrochemical and microscopic techniques.

[Full Paper]
Saurav K. Guin, Peter Knittel, Sven Daboss, Anton Breusow, Christine Kranz
Chem. Asian J., June 08, 2017, https://doi.org/10.1002/asia.201700444 Read article

Highly Active Gold and Gold–Palladium Catalysts Prepared by Colloidal Methods in the Absence of Polymer Stabilizers

Highly Active Gold and Gold–Palladium Catalysts Prepared by Colloidal Methods in the Absence of Polymer Stabilizers

Catalysis au naturale: We show that polymer stabilizers are not necessary to produce catalysts that are highly active for the selective oxidation of glycerol and benzyl alcohol. Gold and gold–palladium nanoparticles prepared in the absence of polyvinyl alcohol and polyvinylpyrrolidone stabilizers show identical activity to those prepared with stabilizers, but crucially, the polymer additives alter the reaction selectivity.

[Communication]
Laura Abis, Simon J. Freakley, Georgios Dodekatos, David J. Morgan, Meenakshisundaram Sankar, Nikolaos Dimitratos, Qian He, Christopher J. Kiely, Graham J. Hutchings
ChemCatChem, June 06, 2017, https://doi.org/10.1002/cctc.201700483 Read article

Resistance Controllability in Alkynylgold(III) Complex-Based Resistive Memory for Flash-Type Storage Applications

Resistance Controllability in Alkynylgold(III) Complex‐Based Resistive Memory for Flash‐Type Storage Applications

Memory at the flick of a switch: The type of resistance switching of devices can be effectively and precisely controlled by controlling the compliance current in the setting process (see figure). Flash-type binary resistance switching can be triggered by a lower compliance current (≤10−3 A), whereas write once read many times (WORM)-type ternary resistance switching can be triggered by a higher compliance current (10−2 A).

[Full Paper]
Peng Wang, Yu Fang, Jun Jiang, Yujin Ji, Youyong Li, Junwei Zheng, Qingfeng Xu, Jianmei Lu
Chem. Asian J., June 01, 2017, https://doi.org/10.1002/asia.201700369 Read article

Freestanding Gold/Graphene-Oxide/Manganese Oxide Microsupercapacitor Displaying High Areal Energy Density

Freestanding Gold/Graphene‐Oxide/Manganese Oxide Microsupercapacitor Displaying High Areal Energy Density

Electrodes want to be free: A new freestanding electrode composed of gold microwires integrated with reduced graphene oxide and coated with MnO2 is presented. The electrode exhibits excellent electrochemical performance, particularly very high areal capacitance. Single- and double-stacked microsupercapacitors are constructed using the freestanding electrodes.

[Full Paper]
Ahiud Morag, James Y. Becker, Raz Jelinek
ChemSusChem, May 24, 2017, https://doi.org/10.1002/cssc.201700500 Read article

Photochemically Prepared Gold/Polymer Nanocoatings: Formation of Gold Mirror

Photochemically Prepared Gold/Polymer Nanocoatings: Formation of Gold Mirror

An easy, fast, and reproducible in situ method for preparation of Au nanoparticles (AuNPs) at or near the polymer surface with controlled size distribution without agglomeration, with thiol functionalized initiator for polyethyleneglycol-based acrylate formulations by UV curing is reported. Prepared AuNP/polymer nanocoatings exhibit a reflective gold mirror view.

[Full Paper]
Tolga Çeper, Nergis Arsu
Macromol. Chem. Phys., May 23, 2017, https://doi.org/10.1002/macp.201700030 Read article

Continuous Electrochemical Detection of Gold Nanoparticles in Flow

Continuous Electrochemical Detection of Gold Nanoparticles in Flow

[Full Paper]
D. Ogończyk, M. Gocyla, T. Andryszewski, M. Opallo
Electroanalysis, May 22, 2017, https://doi.org/10.1002/elan.201700188 Read article

On Ternary Intermetallic Aurides: CaAu2Al2, SrAu2–xAl2+x and Ba3Au5+xAl6–x

On Ternary Intermetallic Aurides: CaAu2Al2, SrAu2–xAl2+x and Ba3Au5+xAl6–x

[Article]
Frank Stegemann, Christopher Benndorf, Yuemei Zhang, Manfred Bartsch, Helmut Zacharias, Boniface P. T. Fokwa, Hellmut Eckert, Oliver Janka
Z. Anorg. Allg. Chem., May 19, 2017, https://doi.org/10.1002/zaac.201700103 Read article

Fabrication of Thermoresponsive Plasmonic Core–Satellite Nanoassemblies with a Tunable Stoichiometry via Surface-Initiated Reversible Addition–Fragmentation Chain Transfer Polymerization from Silica Nanoparticles

Fabrication of Thermoresponsive Plasmonic Core–Satellite Nanoassemblies with a Tunable Stoichiometry via Surface‐Initiated Reversible Addition–Fragmentation Chain Transfer Polymerization from Silica Nanoparticles

Core–satellite nanoassemblies are fabricated in this work. The structure contains a silica nanoparticle core densely grafted with a thermoresponsive polymer shell to anchor numerous gold nanoparticle satellites on the outer periphery with a tunable stoichiometry. The reversible variation of the polymer size leads to thermoresponsive plasmonic properties of the core–satellite nanoassemblies.

[Full Paper]
Lei Wu, Ulrich Glebe, Alexander Böker
Adv. Mater. Interfaces, May 18, 2017, https://doi.org/10.1002/admi.201700092 Read article

A Convergent Synthesis of the Triterpene Saponin Asiaticoside

A Convergent Synthesis of the Triterpene Saponin Asiaticoside

Ah, sugar sugar! Asiaticoside, the major active biomarker of the traditional medicinal plant Centella asiatica, was synthesized in a convergent linear sequence over 14 steps in 6 % overall yield by starting from ursolic acid.

[Full Paper]
Wenbo Shao, Xin Cao, Lei Shen, Fuyi Zhang, Biao Yu
Asian J. Org. Chem., May 10, 2017, https://doi.org/10.1002/ajoc.201700153 Read article

Label-Free Electrochemical Immunosensor for Cardiac Troponin T Based on Exfoliated Graphite Nanoplatelets Decorated with Gold Nanoparticles

Label‐Free Electrochemical Immunosensor for Cardiac Troponin T Based on Exfoliated Graphite Nanoplatelets Decorated with Gold Nanoparticles

[Full Paper]
Nicole Zanato, Lucas Talamini, Eduardo Zapp, Daniela Brondani, Iolanda Cruz Vieira
Electroanalysis, May 08, 2017, https://doi.org/10.1002/elan.201700157 Read article

Thiol-Functionalized Organic Porous Polymers as a Support for Gold Nanoparticles and Its Catalytic Applications

Thiol‐Functionalized Organic Porous Polymers as a Support for Gold Nanoparticles and Its Catalytic Applications

A novel synthesis approach for gold nanohybrid materials is demonstrated using the thiol-functionalized organic porous polymers as a support by combination of hyper-cross-linking and molecular templating of functionalized bottlebrush copolymers.

[Full Paper]
Aiqing Zhong, Yang Xu, Zidong He, Hui Zhang, Tianqi Wang, Minghong Zhou, Linfeng Xiong, Kun Huang
Macromol. Chem. Phys., May 02, 2017, https://doi.org/10.1002/macp.201700044 Read article

Organic Molecular Layer with High Electrochemical Bistability: Synthesis, Structure, and Properties of a Dynamic Redox System with Lipoate Units for Binding to Au(111)

Organic Molecular Layer with High Electrochemical Bistability: Synthesis, Structure, and Properties of a Dynamic Redox System with Lipoate Units for Binding to Au(111)

Show me your bits! Reversible C−C bond formation/cleavage on gold was induced electrochemically on a layer of acridan-based electron donor 1 that was transformed into acridinium 22+. Due to its high electrochemical bistability, this dynamic redox pair may be useful as a unimolecular memory unit, in which one molecule acts as one bit.

[Communication]
Eisuke Ohta, Hiromitsu Uehara, Ying Han, Kazuhisa Wada, Hidenori Noguchi, Ryo Katoono, Yusuke Ishigaki, Hiroshi Ikeda, Kohei Uosaki, Takanori Suzuki
ChemPlusChem, February 08, 2017, https://doi.org/10.1002/cplu.201600649 Read article

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