1
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Adams C, Bonner CDJ, Pathiraja G, Obare SO. Room-Temperature Synthesis of Thioether-Stabilized Ruthenium Nanocubes and Their Optical Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2500-2508. [PMID: 36724795 PMCID: PMC9948292 DOI: 10.1021/acs.langmuir.2c02645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 01/06/2023] [Indexed: 06/18/2023]
Abstract
Controlling the nucleation and growth processes for nanoparticle synthesis allows the development of well-defined structures that offer unique chemical and physical properties. Here, we report a wet chemical reduction method for synthesizing ruthenium nanocubes (Ru NCs) that display plasmonic properties at room temperature (RT). The growth of the particles to form nanostructured cubes was established by varying the carbon chain length of the thioether stabilizing ligands and the reaction time to produce stable and controlled growth. In this study, we found that the longer the thioether chain length, the less isotropic the shape of the particles. Short chain lengths of thioethers (ethyl sulfide and butyl sulfide) produced spherical nanoparticles, whereas longer chain lengths (hexyl sulfide and octyl sulfide) produced cubic nanoparticles. In addition, parameters such as the ligand to precursor ratio also played an important role in the homogeneity of the nanocubes. The Ru NCs were characterized by UV-visible absorbance spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), which supported a face-centered cubic (fcc) structure. Moreover, to demonstrate catalytic efficiency, we studied their ability to reduce benzaldehyde to benzyl alcohol, and the Ru NCs demonstrated an overall 78% efficiency at room temperature.
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Affiliation(s)
- Clara
P. Adams
- Central
Piedmont Community College, 1201 Elizabeth Avenue, Charlotte, North Carolina28204, United States
- Department
of Chemistry, Western Michigan University, 1903 W. Michigan Ave.Kalamazoo, Michigan49008, United States
| | - Chartanay D. J. Bonner
- Department
of Chemistry, Western Michigan University, 1903 W. Michigan Ave.Kalamazoo, Michigan49008, United States
- Department
of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, 2907 East Gate City Boulevard, Greensboro, North Carolina27401, United States
| | - Gayani Pathiraja
- Department
of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, 2907 East Gate City Boulevard, Greensboro, North Carolina27401, United States
| | - Sherine O. Obare
- Department
of Chemistry, Western Michigan University, 1903 W. Michigan Ave.Kalamazoo, Michigan49008, United States
- Department
of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, 2907 East Gate City Boulevard, Greensboro, North Carolina27401, United States
- Department
of Nanoengineering, Joint School of Nanoscience and Nanoengineering, North Carolina A&T State University, 2907 East Gate City Boulevard, Greensboro, North Carolina27401, United States
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2
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Sadiq Z, Safiabadi Tali SH, Hajimiri H, Al-Kassawneh M, Jahanshahi-Anbuhi S. Gold Nanoparticles-Based Colorimetric Assays for Environmental Monitoring and Food Safety Evaluation. Crit Rev Anal Chem 2023:1-36. [PMID: 36629748 DOI: 10.1080/10408347.2022.2162331] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Recent years have witnessed an exponential increase in the research on gold nanoparticles (AuNPs)-based colorimetric sensors to revolutionize point-of-use sensing devices. Hence, this review is compiled focused on current progress in the design and performance parameters of AuNPs-based sensors. The review begins with the characteristics of AuNPs, followed by a brief explanation of synthesis and functionalization methods. Then, the mechanisms of AuNPs-based sensors are comprehensively explained in two broad categories based on the surface plasmon resonance (SPR) characteristics of AuNPs and their peroxidase-like catalytic properties (nanozyme). SPR-based colorimetric sensors further categorize into aggregation, anti-aggregation, etching, growth-mediated, and accumulation-based methods depending on their sensing mechanisms. On the other hand, peroxidase activity-based colorimetric sensors are divided into two methods based on the expression or inhibition of peroxidase-like activity. Next, the analytes in environmental and food samples are classified as inorganic, organic, and biological pollutants, and recent progress in detection of these analytes are reviewed in detail. Finally, conclusions are provided, and future directions are highlighted. Improving the sensitivity, reproducibility, multiplexing capabilities, and cost-effectiveness for colorimetric detection of various analytes in environment and food matrices will have significant impact on fast testing of hazardous substances, hence reducing the pollution load in environment as well as rendering food contamination to ensure food safety.
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Affiliation(s)
- Zubi Sadiq
- Department of Chemical and Materials Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, Montréal, Québec, Canada
| | - Seyed Hamid Safiabadi Tali
- Department of Chemical and Materials Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, Montréal, Québec, Canada
| | - Hasti Hajimiri
- Department of Chemical and Materials Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, Montréal, Québec, Canada
| | - Muna Al-Kassawneh
- Department of Chemical and Materials Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, Montréal, Québec, Canada
| | - Sana Jahanshahi-Anbuhi
- Department of Chemical and Materials Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, Montréal, Québec, Canada
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3
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Janoušek J, Rybáček J, Buděšínský M, Pospíšil L, Stará IG, Starý I. Electrochemistry of Tetrathiafulvalene Ligands Assembled on the Surface of Gold Nanoparticles. Molecules 2022; 27:molecules27217639. [PMID: 36364465 PMCID: PMC9659269 DOI: 10.3390/molecules27217639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/31/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022] Open
Abstract
The synthesis of a tetrathiafulvalene (TTF) derivative, S-[4-({4-[(2,2′-bi-1,3-dithiol-4-ylmethoxy)methyl] phenyl}ethynyl)phenyl] ethanethioate, suitable for the modification of gold nanoparticles (AuNPs), is described in this article. The TTF ligand was self-assembled on the AuNP surface through ligand exchange, starting from dodecanethiol-stabilized AuNPs. The resulting modified AuNPs were characterized by TEM, UV-Vis spectroscopy, and electrochemistry. The most suitable electrochemical method was the phase-sensitive AC voltammetry at very low frequencies of the sine-wave perturbation. The results indicate a diminishing electronic communication between the two equivalent redox centers of TTF and also intermolecular donor–acceptor interactions manifested by an additional oxidation wave upon attachment of the ligand to AuNPs.
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Affiliation(s)
- Jiří Janoušek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542/2, 160 00 Prague, Czech Republic
| | - Jiří Rybáček
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542/2, 160 00 Prague, Czech Republic
| | - Miloš Buděšínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542/2, 160 00 Prague, Czech Republic
| | - Lubomír Pospíšil
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542/2, 160 00 Prague, Czech Republic
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Prague, Czech Republic
- Correspondence: (L.P.); (I.S.)
| | - Irena G. Stará
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542/2, 160 00 Prague, Czech Republic
| | - Ivo Starý
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 542/2, 160 00 Prague, Czech Republic
- Correspondence: (L.P.); (I.S.)
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4
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Hariharan K, Patel P, Mehta T. Surface modifications of Gold Nanoparticles: Stabilization and Recent Applications in Cancer Therapy. Pharm Dev Technol 2022; 27:665-683. [PMID: 35850605 DOI: 10.1080/10837450.2022.2103825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Gold nanoparticles (GNP) are noble metal nanocarriers that have been recently researched upon for pharmaceutical applications, imaging, and diagnosis. These metallic nanocarriers are easy to synthesize using chemical reduction techniques as their surface can be easily modified. Also, the properties of GNP are significantly affected by its size and shape which mandates its stabilization using suitable techniques of surface modification. Over the past decade, research has focused on surface modification of GNP and its stabilization using polymers, polysaccharides, proteins, dendrimers, and phase-stabilizers like gel phase or ionic liquid phase. The use of GNP for pharmaceutical applications requires its surface modification using biocompatible and inert surface modifiers. The stabilizers used, interact with the surface of GNP to provide either electrostatic stabilization or steric stabilization. This review extensively discusses the surface modification techniques for GNP and the related molecular level interactions involved in the same. The influence of various factors like the concentration of stabilizers used their characteristics like chain length and thickness, pH of the surrounding media, etc., on the surface of GNP and resulting to stability have been discussed in detail. Further, this review highlights the recent applications of surface-modified GNP in the management of tumor microenvironment and cancer therapy.
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Affiliation(s)
- Kartik Hariharan
- Institute of Pharmacy, Nirma University, SG Highway, Gota, Ahmedabad-382481, Gujarat, India
| | - Parth Patel
- Institute of Pharmacy, Nirma University, SG Highway, Gota, Ahmedabad-382481, Gujarat, India
| | - Tejal Mehta
- Institute of Pharmacy, Nirma University, SG Highway, Gota, Ahmedabad-382481, Gujarat, India
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5
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Peters EH, Mayor M. Alkyne‐Monofunctionalized Gold Nanoparticles as Massive Molecular Building Blocks. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Erich Henrik Peters
- Departement of Chemistry University of Basel St. Johanns‐Ring 19 4056 Basel Switzerland
| | - Marcel Mayor
- Departement of Chemistry University of Basel St. Johanns‐Ring 19 4056 Basel Switzerland
- Institute for Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) P. O. Box 3640 76021 Karlsruhe Germany
- Lehn Institute of Functional Materials (LIFM) Sun Yat‐Sen University (SYSU) Xingang Xi Rd. 135 510275 Guangzhou P. R. China
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6
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Shankar R, Sharma A, Jangir B, Chaudhary M, Kociok-Köhn G. Catalytic oxidation of diorganosilanes to 1,1,3,3-tetraorganodisiloxanes with gold nanoparticle assembly at the water–chloroform interface. NEW J CHEM 2019. [DOI: 10.1039/c8nj04223c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The synthesis of 1,1,3,3-tetraorganodisiloxanes from the hydrolytic oxidation of diorganosilanes, RR1SiH2, using AuNPs as an interfacial catalyst is described. This study provides a manifestation of the photothermal effect in enhancing the catalytic activity at ambient temperature.
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Affiliation(s)
- Ravi Shankar
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Asmita Sharma
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Bhawana Jangir
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Manchal Chaudhary
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
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7
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Elbert KC, Lee JD, Wu Y, Murray CB. Improved Chemical and Colloidal Stability of Gold Nanoparticles through Dendron Capping. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13333-13338. [PMID: 30350692 DOI: 10.1021/acs.langmuir.8b02960] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanoparticle (NP) stability is imperative for commercialization of nanotechnology. In this study, we compare the stability of Au NPs with surfaces functionalized with oleylamine, dodecanethiol, and two dendritic ligands of different generations. Dendrimer ligands provide a significant increase in the chemical stability of Au NPs when analyzed by cyanide-induced NP decomposition as well as an investigation into their colloidal stability at ambient conditions. These results were supported by absorption measurements, transmission electron microscopy, thermogravimetric analysis, nuclear magnetic resonance, and small-angle transmission X-ray scattering and show that dendrimers play a key role in improving the chemical and colloidal stability of NPs.
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8
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Feineis S, Lutz J, Heffele L, Endl E, Albrecht K, Groll J. Thioether-Polyglycidol as Multivalent and Multifunctional Coating System for Gold Nanoparticles. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:1704972. [PMID: 29318682 DOI: 10.1002/adma.201704972] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/11/2017] [Indexed: 06/07/2023]
Abstract
Thiofunctional polymers are the established standard for the coating and biofunctionalization of gold nanoparticles (AuNPs). However, the nucleophilic and oxidative character of thiols provokes polymeric crosslinking and significantly limits the chemical possibilities to introduce biological functions. Thioethers represent a chemically more stable potential alternative to thiols that would offer easier functionalization, yet a few studies in the literature report inconclusive data regarding the efficacy of thioethers to stabilize AuNPs in comparison to thiols. A systematic comparison is presented of mono- versus multivalent thiol- and thioether-functional polymers, poly(ethylene glycol) versus side chain functional poly(glycidol) (PG) and it is shown that coating of AuNPs with multivalent thioether-functional PG leads to superior colloidal stability, even under physiological conditions and after freeze-drying and resuspension, as compared to thiol analogs at comparable polymer surface coverages. In addition, it is shown that a wide range of functional groups can be introduced in these polymers. Using diazirine functionalization as example, it is demonstrated that proteins can be covalently immobilized, and that conjugation of antibodies via this strategy enables efficient targeting and laser-irradiation induced killing of cells.
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Affiliation(s)
- Susanne Feineis
- Department of Functional Materials for Medicine and Dentistry and Bavarian Polymer Institute (BPI), University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Johanna Lutz
- Department of Functional Materials for Medicine and Dentistry and Bavarian Polymer Institute (BPI), University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Lora Heffele
- Institutes of Molecular Medicine and Experimental Immunology, University of Bonn, Sigmund-Freud-Straße 25, 53105, Bonn, Germany
| | - Elmar Endl
- Institutes of Molecular Medicine and Experimental Immunology, University of Bonn, Sigmund-Freud-Straße 25, 53105, Bonn, Germany
| | - Krystyna Albrecht
- Department of Functional Materials for Medicine and Dentistry and Bavarian Polymer Institute (BPI), University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Jürgen Groll
- Department of Functional Materials for Medicine and Dentistry and Bavarian Polymer Institute (BPI), University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
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9
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Liu X, Zhu C, Xu L, Dai Y, Liu Y, Liu Y. Green and Facile Synthesis of Highly Stable Gold Nanoparticles via Hyperbranched Polymer In-Situ Reduction and Their Application in Ag⁺ Detection and Separation. Polymers (Basel) 2018; 10:polym10010042. [PMID: 30966079 PMCID: PMC6415124 DOI: 10.3390/polym10010042] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 12/25/2017] [Accepted: 12/30/2017] [Indexed: 01/12/2023] Open
Abstract
The development of a green and facile strategy for synthesizing high stable gold nanoparticles (AuNPs) is still highly challenging. Additionally, the main problems regarding AuNPs based colorimetric sensors are their poor selectivity and low sensitivity, as well their tendency to aggregate during their synthesis and sensing process. Herein, we present an in-situ reduction strategy to synthesize thermoresponsive hyperbranched polymer (i.e., Hyperbranched polyethylenimine-terminal isobutyramide (HPEI-IBAm)) functionalized AuNPs. The HPEI-IBAm-AuNPs show excellent thermal stability up to 200 °C, high tolerance of a wide range of pH value (3⁻13), and high salt resistance. HPEI-IBAm acted as the template, the reducing agent, and the stabilizing agent for the preparation of AuNPs. The HPEI-IBAm-AuNPs can be used as colorimetric sensors for the detection of Ag⁺. In the detecting process, HPEI-IBAm serves as a trigger agent to cause an unusual color change from red to brown. This new non-aggregation-based colorimetric sensor showed high stability (maintaining the color lasting without fading), high selectivity, and high sensitivity with an extremely low detection limit of 7.22 nM and a good linear relationship in a wide concentration range of 0⁻2.0 mM (R² = 0.9921). Significantly, based on the thermoresponsive property of the HPEI-IBAm, the AuNPs/Ag composites can be separated after sensing detection, which can avoid secondary pollutions. Therefore, the green preparation and the applications of the unusual colorimetric sensor truly embody the concepts of energy saving, environmental protection, and sustainable development.
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Affiliation(s)
- Xunyong Liu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, China.
| | - Chenxue Zhu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, China.
| | - Li Xu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, China.
| | - Yuqing Dai
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, China.
| | - Yanli Liu
- School of Information and Electronic Engineering, Shandong Technology and Business University, Yantai 264005, Shandong Province, China.
| | - Yi Liu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong Province, China.
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10
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Sutradhar S, Patnaik A. Structure and Dynamics of a N-Methylfulleropyrrolidine-Mediated Gold Nanocomposite: A Spectroscopic Ruler. ACS APPLIED MATERIALS & INTERFACES 2017; 9:21921-21932. [PMID: 28593769 DOI: 10.1021/acsami.7b02640] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A mechanistic understanding of the structure and dynamics of a chemically tunable N-methylfulleropyrrolidine (8-NMFP)-assisted gold nanocomposite and its aggregation via a controllable interparticle interaction is reported as a function of the molar ratio and pH of the medium. Electronic structure calculations adopting density functional theory methods implied electrostatic interactions to play a dominant role between 8-NMFP and citrate-capped gold nanoparticles. MM+ molecular mechanics force field computations revealed intermolecular gold-gold interactions, contributing toward the formation of spherical composite aggregates. Corroborating these, optical absorption spectra showed the usual surface plasmon band along with a higher-wavelength feature at ∼600-650 nm, indicative of the aggregated nanocomposite. pH-controlled reversible tuning of the plasmonic features in the composite was evident in a pH interval ∼5-6.8, revealing prevalent interparticle electrostatic interactions. In addition, photoluminescence (PL) and time-correlated single-photon counting studies revealed a strong nanocomposite interaction with a pure fluorescent dye, Rhodamine B, indicating excitation energy transfer from the dye to the composite. The dye upon interaction with the nanocomposite showed a significant quenching of its PL intensity and shortening of lifetime. Energy coupling between the metal nanoparticle composite and the emitting molecular dipole resulted in a long-range surface energy transfer (SET) from the donor dye to the surface plasmon modes of the nanoparticle following a donor-acceptor distance dependence of 1/r4. This molecular beacon with correlation between the nanoscale structure and the nonradiative nanometal SET can be used as a spectroscopic/molecular ruler in probing advanced functional materials.
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Affiliation(s)
- Sanjeeb Sutradhar
- Colloid and Interface Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Madras , Chennai 600036, India
| | - Archita Patnaik
- Colloid and Interface Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Madras , Chennai 600036, India
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11
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Kim B, Ratnayake R, Lee H, Shi G, Zeller SL, Li C, Luesch H, Hong J. Synthesis and biological evaluation of largazole zinc-binding group analogs. Bioorg Med Chem 2017; 25:3077-3086. [PMID: 28416100 DOI: 10.1016/j.bmc.2017.03.071] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 03/23/2017] [Accepted: 03/27/2017] [Indexed: 11/24/2022]
Abstract
Histone acetylation is an extensively investigated post-translational modification that plays an important role as an epigenetic regulator. It is controlled by histone acetyl transferases (HATs) and histone deacetylases (HDACs). The overexpression of HDACs and consequent hypoacetylation of histones have been observed in a variety of different diseases, leading to a recent focus of HDACs as attractive drug targets. The natural product largazole is one of the most potent natural HDAC inhibitors discovered so far and a number of largazole analogs have been prepared to define structural requirements for its HDAC inhibitory activity. However, previous structure-activity relationship studies have heavily investigated the macrocycle region of largazole, while there have been only limited efforts to probe the effect of various zinc-binding groups (ZBGs) on HDAC inhibition. Herein, we prepared a series of largazole analogs with various ZBGs and evaluated their HDAC inhibition and cytotoxicity. While none of the analogs tested were as potent or selective as largazole, the Zn2+-binding affinity of each ZBG correlated with HDAC inhibition and cytotoxicity. We expect that our findings will aid in building a deeper understanding of the role of ZBGs in HDAC inhibition as well as provide an important basis for the future development of new largazole analogs with non-thiol ZBGs as novel therapeutics for cancer.
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Affiliation(s)
- Bumki Kim
- Department of Chemistry, Duke University, Durham, NC 27708, United States
| | - Ranjala Ratnayake
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States; Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Hyunji Lee
- Department of Chemistry, Duke University, Durham, NC 27708, United States
| | - Guqin Shi
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, OH 43210, United States
| | - Sabrina L Zeller
- Department of Chemistry, Duke University, Durham, NC 27708, United States
| | - Chenglong Li
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States; Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Hendrik Luesch
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States; Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States.
| | - Jiyong Hong
- Department of Chemistry, Duke University, Durham, NC 27708, United States; Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC 27710, United States.
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12
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Lehmann M, Peters EH, Mayor M. Size Matters: Influence of Gold-to-Ligand Ratio and Sulfur-Sulfur Distance of Linear Thioether Heptamers on the Size of Gold Nanoparticles. Helv Chim Acta 2017. [DOI: 10.1002/hlca.201600395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mario Lehmann
- Department of Chemistry; University of Basel; St. Johanns-Ring 19 CH-4056 Basel
| | - Erich Henrik Peters
- Department of Chemistry; University of Basel; St. Johanns-Ring 19 CH-4056 Basel
| | - Marcel Mayor
- Department of Chemistry; University of Basel; St. Johanns-Ring 19 CH-4056 Basel
- Institute for Nanotechnology (INT); Karlsruhe Institute of Technology (KIT); P.O. Box 3640 DE-76021 Karlsruhe
- Lehn Institute of Functional Materials (LIFM); Sun Yat-Sen University (SYSU); XinGangXi Rd. 135 Guangzhou 510275 P. R. China
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13
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Burgoyne AR, Kaschula CH, Parker MI, Smith GS. In vitro Cytotoxicity of Half-Sandwich Platinum Group Metal Complexes of a Cationic Alkylated Phosphaadamantane Ligand. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501458] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Lehmann M, Peters EH, Mayor M. Linear Tetraphenylmethane-Based Thioether Oligomers Stabilising an Entire Gold Nanoparticle by Enwrapping. Chemistry 2016; 22:2261-5. [PMID: 26690321 DOI: 10.1002/chem.201504575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Indexed: 11/05/2022]
Abstract
The design and synthesis of a novel linear thioether-based ligand subunit with a tetraphenylmethane core used in the stabilisation of gold nanoparticles (AuNPs) are presented. Mono-, tri, penta- and heptamers of the ligand have been synthesised and used to stabilise AuNPs by enwrapping. With the exception of the monomer, all ligands provide reliable long-term stability and redispersibility for the coated nanoparticles in common organic solvents. Despite variation of the oligomer length, all stable particles were of the same size within error tolerance (1.16±0.32 nm for the trimer, 1.15±0.30 nm for the pentamer, 1.17±0.34 nm for the heptamer), as investigated by transmission electron microscopy (TEM). These findings suggest that not only the number of sulfur atoms in the ligand, but also its bulkiness play a crucial role in stabilising the AuNPs. These findings are supported by thermogravimetric analysis (TGA), showing that AuNPs stabilised by the penta- or heptamer are passivated by a single ligand. Thermal stability measurements suggest a correlation between ligand coverage and thermal stability, further supporting these findings.
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Affiliation(s)
- Mario Lehmann
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Erich Henrik Peters
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Marcel Mayor
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland. .,Institute for Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021, Karlsruhe, Germany. .,Lehn Institute of Functional Materials (LIFM), Sun Yat-Sen University (SYSU), Guangzhou, P. R. China.
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15
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Li D, Dong M, Besenbacher F, Huang Y, Chen M. The preparation of a recyclable catalyst of silver nanoparticles dispersed in a mesoporous silica nanofiber matrix. RSC Adv 2016. [DOI: 10.1039/c6ra10867a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A recyclable catalyst of sliver nanoparticles well dispersed in mesoporous silica was successfully synthesized via a straight-forward strategy combining an electrospinning technique with post-calcination.
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Affiliation(s)
- Dalong Li
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Aarhus C
- Denmark
- School of Chemical Engineering and Technology
| | - Mingdong Dong
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Aarhus C
- Denmark
| | | | - Yudong Huang
- School of Chemical Engineering and Technology
- Harbin Institute of Technology
- Harbin
- China
| | - Menglin Chen
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- Aarhus C
- Denmark
- Department of Engineering
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16
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Pichugina DA, Kuz'menko NE, Shestakov AF. Ligand-protected gold clusters: the structure, synthesis and applications. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4493] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Chen M, Kang H, Gong Y, Guo J, Zhang H, Liu R. Bacterial Cellulose Supported Gold Nanoparticles with Excellent Catalytic Properties. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21717-26. [PMID: 26357993 DOI: 10.1021/acsami.5b07150] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Amidoxime surface functionalized bacterial cellulose (AOBC) has been successfully prepared by a simple two-step method without obviously changing the morphology of bacterial cellulose. AOBC has been used as the reducing agent and carrier for the synthesis of gold nanoparticles (AuNPs) that distributed homogeneously on bacterial cellulose surface. Higher content in amidoxime groups in AOBC is beneficial for the synthesis of AuNPs with smaller and more uniform size. The AuNPs/AOBC nanohybrids have excellent catalytic activity for reduction of 4-nitrophenol (4-NP) by using NaBH4. It was found that catalytic activity of AuNPs/AOBC first increases with increasing NaBH4 concentration and temperature, and then leveled off at NaBH4 concentration above 238 mM and temperature above 50 °C. Moreover, AuNPs with smaller size have higher catalytic activity. The highest apparent turnover frequency of AuNPs/AOBC is 1190 h(-1). The high catalytic activity is due to the high affinity of 4-NP with AuNPs/AOBC and the reduced product 4-aminophenol has good solubility in water in the presence of AuNPs/AOBC. The catalytic stability of the AuNPs/AOBC was estimated by filling a fluid column contained AuNPs/AOBC and used for continuously catalysis of the reduction of 4-NP by using NaBH4. The column works well without detection of 4-NP in the eluent after running for more than two months, and it is still running. This work provides an excellent catalyst based on bacterial cellulose stabilized AuNPs and has promising applications in industry.
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Affiliation(s)
- Meiyan Chen
- School of Textile and Material Engineering, Dalian Polytechnic University , Dalian, 116034, China
- Sate Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Hongliang Kang
- Sate Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Yumei Gong
- School of Textile and Material Engineering, Dalian Polytechnic University , Dalian, 116034, China
| | - Jing Guo
- School of Textile and Material Engineering, Dalian Polytechnic University , Dalian, 116034, China
| | - Hong Zhang
- School of Textile and Material Engineering, Dalian Polytechnic University , Dalian, 116034, China
| | - Ruigang Liu
- Sate Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
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18
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Rousseau G, Lavenn C, Cardenas L, Loridant S, Wang Y, Hahn U, Nierengarten JF, Demessence A. One-pot synthesis of sub-3 nm gold nanoparticle networks connected by thio-based multidentate fullerene adducts. Chem Commun (Camb) 2015; 51:6730-3. [PMID: 25670346 DOI: 10.1039/c5cc00204d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new organo-soluble [60]fullerene hexaadduct bearing twelve thiocyanate functions has been synthesized and successfully used as a stabilizing/assembling agent to assemble homogeneous sub-3 nm gold nanoparticles into extended tridimensional networks.
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Affiliation(s)
- Guillaume Rousseau
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON), UMR CNRS 5256, Lyon 1 University, 2 avenue A. Einstein, 69628 Villeurbanne, France.
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19
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Murphy CJ, Shi X, Jewell AD, McGuire AF, Bellisario DO, Baber AE, Tierney HL, Lewis EA, Sholl DS, Sykes ECH. Impact of branching on the supramolecular assembly of thioethers on Au(111). J Chem Phys 2015; 142:101915. [PMID: 25770504 DOI: 10.1063/1.4907270] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Alkanethiolate monolayers are one of the most comprehensively studied self-assembled systems due to their ease of preparation, their ability to be functionalized, and the opportunity to control their thickness perpendicular to the surface. However, these systems suffer from degradation due to oxidation and defects caused by surface etching and adsorbate rotational boundaries. Thioethers offer a potential alternative to thiols that overcome some of these issues and allow dimensional control of self-assembly parallel to the surface. Thioethers have found uses in surface modification of nanoparticles, and chiral thioethers tethered to catalytically active surfaces have been shown to enable enantioselective hydrogenation. However, the effect of structural, chemical, and chiral modifications of the alkyl chains of thioethers on their self-assembly has remained largely unstudied. To elucidate how molecular structure, particularly alkyl branching and chirality, affects molecular self-assembly, we compare four related thioethers, including two pairs of structural isomers. The self-assembly of structural isomers N-butyl methyl sulfide and tert-butyl methyl sulfide was studied with high resolution scanning tunneling microscopy (STM); our results indicate that both molecules form highly ordered arrays despite the bulky tert-butyl group. We also investigated the effect of intrinsic chirality in the alkyl tails on the adsorption and self-assembly of butyl sec-butyl sulfide (BSBS) with STM and density functional theory and contrast our results to its structural isomer, dibutyl sulfide. Calculations provide the relative stability of the four stereoisomers of BSBS and STM imaging reveals two prominent monomer forms. Interestingly, the racemic mixture of BSBS is the only thioether we have examined to date that does not form highly ordered arrays; we postulate that this is due to weak enantiospecific intermolecular interactions that lead to the formation of energetically similar but structurally different assemblies. Furthermore, we studied all of the molecules in their monomeric molecular rotor form, and the surface-adsorbed chirality of the three asymmetric thioethers is distinguishable in STM images.
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Affiliation(s)
- Colin J Murphy
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
| | - Xuerong Shi
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - April D Jewell
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
| | - Allister F McGuire
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
| | - Darin O Bellisario
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
| | - Ashleigh E Baber
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
| | - Heather L Tierney
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
| | - Emily A Lewis
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
| | - David S Sholl
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - E Charles H Sykes
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, USA
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20
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Azzouz A, Nousir S, Bouazizi N, Roy R. Metal-inorganic-organic matrices as efficient sorbents for hydrogen storage. CHEMSUSCHEM 2015; 8:800-803. [PMID: 25663131 DOI: 10.1002/cssc.201402958] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 12/16/2014] [Indexed: 06/04/2023]
Abstract
Stabilization of metal nanoparticles (MNPs) without re-aggregation is a major challenge. An unprecedented strategy is developed for achieving high dispersion of copper(0) or palladium(0) on montmorillonite-supported diethanolamine or thioglycerol. This results in novel metal-inorganic-organic matrices (MIOM) that readily capture hydrogen at ambient conditions, with easy release under air stream. Hydrogen retention appears to involve mainly physical interactions, slightly stronger on thioglycerol-based MIOM (S-MIOM). Thermal enhancement of desorption suggests also a contribution of chemical interactions. The increase of hydrogen uptake with prolonged contact times arises from diffusion hindrance, which appears to be beneficial by favoring hydrogen entrapment. Even with compact structures, MIOMs act as efficient sorbents with much higher efficiency factor (1.14-1.17 mmol H 2 m(-2)) than many other sophisticated adsorbents reported in the literature. This opens new prospects for hydrogen storage and potential applications in microfluidic hydrogenation reactions.
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Affiliation(s)
- Abdelkrim Azzouz
- Department of Chemistry, University of Quebec at Montreal (UQAM), CP 8888, Succ. Centre-ville, Montreal, Quebec H3C3P8 (Canada), Fax:1-514-987-4054 www.nanoqam.uqam.ca/professeur.php?id=11&lang=fr.
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21
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Pletsch H, Greiner A, Agarwal S. Preparing a pseudo-solid by the reinforcement of a polydentate thioether using silver nanoparticles. NANOSCALE 2015; 7:1977-1983. [PMID: 25536368 DOI: 10.1039/c4nr06834c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The design of networks from polymers and noble metal nanoparticles requires thorough control over topological polymer-particle arrangements. This study explores the interaction between a linear polydentate poly(propylene sulfide) (PPrS) ligand and silver nanoparticles (AgNPs) with an aim to study its effect on mechanical and viscoelastic properties. Very low amounts (0.30 vol%) of silver nanoparticles lead to significant mechanical reinforcement of PPrS, yielding viscoelastic properties of an unfastened network with solid-like elastic responses on mechanical stimulation. The materials are made by ring-opening anionic polymerization of propylene sulfide to yield high molar mass PPrS with a total of 593 thioether functionalities per chain, followed by a simple in situ "grafting to" method to homogeneously incorporate AgNPs into the polymer matrix. From investigations on the chain dynamics using dynamic rheology it is concluded that well-dispersed AgNPs impose additional topological constraints on the polymer chains. Calculations of the statistical interparticle distances support a tele-bridging polymer-particle arrangement.
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Affiliation(s)
- Holger Pletsch
- Faculty of Biology, Chemistry and Earth Sciences, Macromolecular Chemistry II and Bayreuth Center for Colloids and Interfaces, University of Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany.
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22
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Bodappa N, Fluch U, Fu Y, Mayor M, Moreno-García P, Siegenthaler H, Wandlowski T. Controlled assembly and single electron charging of monolayer protected Au144 clusters: an electrochemistry and scanning tunneling spectroscopy study. NANOSCALE 2014; 6:15117-15126. [PMID: 25372883 DOI: 10.1039/c4nr03793f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Single gold particles may serve as room temperature single electron memory units because of their size dependent electronic level spacing. Here, we present a proof-of-concept study by electrochemically controlled scanning probe experiments performed on tailor-made Au particles of narrow dispersity. In particular, the charge transport characteristics through chemically synthesized hexane-1-thiol and 4-pyridylbenzene-1-thiol mixed monolayer protected Au(144) clusters (MPCs) by differential pulse voltammetry (DPV) and electrochemical scanning tunneling spectroscopy (EC-STS) are reported. The pyridyl groups exposed by the Au-MPCs enable their immobilization on Pt(111) substrates. By varying the humidity during their deposition, samples coated by stacks of compact monolayers of Au-MPCs or decorated with individual, laterally separated Au-MPCs are obtained. DPV experiments with stacked monolayers of Au(144)-MPCs and EC-STS experiments with laterally separated individual Au(144)-MPCs are performed both in aqueous and ionic liquid electrolytes. Lower capacitance values were observed for individual clusters compared to ensemble clusters. This trend remains the same irrespective of the composition of the electrolyte surrounding the Au(144)-MPC. However, the resolution of the energy level spacing of the single clusters is strongly affected by the proximity of neighboring particles.
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Affiliation(s)
- Nataraju Bodappa
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland.
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23
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Li N, Echeverría M, Moya S, Ruiz J, Astruc D. “Click” Synthesis of Nona-PEG-branched Triazole Dendrimers and Stabilization of Gold Nanoparticles That Efficiently Catalyze p-Nitrophenol Reduction. Inorg Chem 2014; 53:6954-61. [DOI: 10.1021/ic500861f] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Na Li
- ISM, UMR CNRS 5255, University of Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - María Echeverría
- CIC biomaGUNE, Unidad Biosuperficies, Paseo Miramón no. 182, Edif. “C”, 20009 Donostia-San Sebastián, Spain
| | - Sergio Moya
- CIC biomaGUNE, Unidad Biosuperficies, Paseo Miramón no. 182, Edif. “C”, 20009 Donostia-San Sebastián, Spain
| | - Jaime Ruiz
- ISM, UMR CNRS 5255, University of Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Didier Astruc
- ISM, UMR CNRS 5255, University of Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
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24
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Thomas HR, Marsden AJ, Walker M, Wilson NR, Rourke JP. Sulfur-functionalized graphene oxide by epoxide ring-opening. Angew Chem Int Ed Engl 2014; 53:7613-8. [PMID: 24895067 DOI: 10.1002/anie.201404002] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Indexed: 11/05/2022]
Abstract
The treatment of graphene oxide (GO) with potassium thioacetate followed by an aqueous work-up yields a new material via the ring-opening of the epoxide groups. The new material is a thiol-functionalized GO (GO-SH) which is able to undergo further functionalization. Reaction with butyl bromide gives another new material, GO-SBu, which shows significantly enhanced thermal stability compared to both GO and GO-SH. The thiol-functionalized GO material showed a high affinity for gold, as demonstrated by the selective deposition of a high density of gold nanoparticles.
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Affiliation(s)
- Helen R Thomas
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL (UK)
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25
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Thomas HR, Marsden AJ, Walker M, Wilson NR, Rourke JP. Sulfur-Functionalized Graphene Oxide by Epoxide Ring-Opening. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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26
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Sander F, Fluch U, Hermes JP, Mayor M. Dumbbells, trikes and quads: organic-inorganic hybrid nanoarchitectures based on "clicked" gold nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:349-359. [PMID: 23881793 DOI: 10.1002/smll.201300839] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 05/24/2013] [Indexed: 06/02/2023]
Abstract
The controlled assembly of gold nanoparticles in terms of the spatial arrangement and number of particles is essential for many future applications like electronic devices, sensors and labeling. Here an approach is presented to build up oligomers of mono functionalized gold nanoparticles by the use of 1,3-bipolar azide alkyne cycloaddition click chemistry. The gold nanoparticles of 1.3 nm diameter are stabilized by one dendritic thioether ligand comprising an alkyne function. Together with di-, tri- and tetra-azide linker molecules the gold nanoparticle can be covalently coupled by a wet chemical protocol. The reaction is tracked with IR and UV-vis spectroscopy and the yielded organic-inorganic hybrid structures are analyzed by transmission electron microscopy. To evaluate the success of this click chemistry reaction statistical analysis of the formed oligomers is performed. The geometric and spatial arrangements of the found oligomers match perfectly the calculated values for the used linker molecules. Dimers, trimers and tetramers could be identified after the reaction with the corresponding linker molecule. The results of this model reaction suggest that the used click chemistry protocol is working well with mono functionalized gold nanoparticles.
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Affiliation(s)
- Fabian Sander
- University of Basel, Department of Chemistry, St. Johannsring 19, CH-4056, Basel, Switzerland
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27
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McCaffrey R, Long H, Jin Y, Sanders A, Park W, Zhang W. Template synthesis of gold nanoparticles with an organic molecular cage. J Am Chem Soc 2014; 136:1782-5. [PMID: 24432779 DOI: 10.1021/ja412606t] [Citation(s) in RCA: 139] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We report a novel strategy for the controlled synthesis of gold nanoparticles (AuNPs) with narrow size distribution (1.9 ± 0.4 nm) through NP nucleation and growth inside the cavity of a well-defined three-dimensional, shape-persistent organic molecular cage. Our results show that both a well-defined cage structure and pendant thioether groups pointing inside the cavity are essential for the AuNP synthesis.
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Affiliation(s)
- Ryan McCaffrey
- Department of Chemistry and Biochemistry, and ⊥Department of Electrical, Computer and Energy Engineering, University of Colorado , Boulder, Colorado 80309, United States
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28
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29
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Sakamoto M, Tanaka D, Teranishi T. Rigid bidentate ligands focus the size of gold nanoparticles. Chem Sci 2013. [DOI: 10.1039/c2sc21560h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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30
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Hermes JP, Sander F, Fluch U, Peterle T, Thompson D, Urbani R, Pfohl T, Mayor M. Monofunctionalized Gold Nanoparticles Stabilized by a Single Dendrimer Form Dumbbell Structures upon Homocoupling. J Am Chem Soc 2012; 134:14674-7. [DOI: 10.1021/ja306253t] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jens Peter Hermes
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel,
Switzerland
| | - Fabian Sander
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel,
Switzerland
| | - Ulrike Fluch
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel,
Switzerland
| | - Torsten Peterle
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel,
Switzerland
| | - Damien Thompson
- Theory Modelling
and Design
Centre, Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland
| | - Raphael Urbani
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, CH-4056
Basel, Switzerland
| | - Thomas Pfohl
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, CH-4056
Basel, Switzerland
| | - Marcel Mayor
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel,
Switzerland
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640,
D-76021 Karlsruhe, Germany
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31
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Govender P, Therrien B, Smith GS. Bio-Metallodendrimers - Emerging Strategies in Metal-Based Drug Design. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200161] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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32
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Thompson D, Hermes JP, Quinn AJ, Mayor M. Scanning the potential energy surface for synthesis of dendrimer-wrapped gold clusters: design rules for true single-molecule nanostructures. ACS NANO 2012; 6:3007-3017. [PMID: 22432786 DOI: 10.1021/nn204470g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The formation of true single-molecule complexes between organic ligands and nanoparticles is challenging and requires careful design of molecules with size, shape, and chemical properties tailored for the specific nanoparticle. Here we use computer simulations to describe the atomic-scale structure, dynamics, and energetics of ligand-mediated synthesis and interlinking of 1 nm gold clusters. The models help explain recent experimental results and provide insight into how multidentate thioether dendrimers can be employed for synthesis of true single-ligand-nanoparticle complexes and also nanoparticle-molecule-nanoparticle "dumbbell" nanostructures. Electronic structure calculations reveal the individually weak thioether-gold bonds (325 ± 36 meV), which act collectively through the multivalent (multisite) anchoring to stabilize the ligand-nanoparticle complex (∼7 eV total binding energy) and offset the conformational and solvation penalties involved in this "wrapping" process. Molecular dynamics simulations show that the dendrimer is sufficiently flexible to tolerate the strained conformations and desolvation penalties involved in fully wrapping the particle, quantifying the subtle balance between covalent anchoring and noncovalent wrapping in the assembly of ligand-nanoparticle complexes. The computed preference for binding of a single dendrimer to the cluster reveals the prohibitively high dendrimer desolvation barrier (1.5 ± 0.5 eV) to form the alternative double-dendrimer structure. Finally, the models show formation of an additional electron transfer channel between nitrogen and gold for ligands with a central pyridine unit, which gives a stiff binding orientation and explains the recently measured larger interparticle distances for particles synthesized and interlinked using linear ligands with a central pyridine rather than a benzene moiety. The findings stress the importance of organic-inorganic interactions, the control of which is central to the rational engineering and eventual large-scale production of functional building blocks for nano(bio)electronics.
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Affiliation(s)
- Damien Thompson
- Theory Modelling and Design Centre, Tyndall National Institute, University College Cork, Cork, Ireland.
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