Download or read book Synthesis Crystallization and Characterization of Gold I Complexes with Studies on Luminescence Polymorphism and Response to Environmental Stimuli written by Phuong (Lucy) Minh Cam Luong and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research presented in this dissertation focuses on the synthesis, crystallization, and characterization of various gold(I) complexes. With every gold(I) crystal, intensive studies were conducted to uncover any luminescence, polymorphism, and/or response to environmental stimuli such as temperature, vapor, and pressure. All doctoral research performed in the Balch lab, including collaborations with other members as well as outside research groups, is not fully presented in this dissertation. A list of publications can be found at the end. Chapter 1 explores the role of anions and mixture of anions in crystals of bis(cyclohexylioscyanide) gold(I) cations, [(C6H11NC)2Au]+. A new crystal was synthesized and characterized with the (SbF6)− noncoordinating anion. The crystal displayed no known polymorphism unlike its previously synthesized (PF6)− and (AsF6)− analogues. However, by mixing combinations of anions and ratios of anions, an isostructural set of crystals were produced. Not only were thermochromic trends observed for mixed anion crystals with known thermochromic species but unexpected thermochromic properties appeared in mixed anion crystals that contained species with no thermochromism. In Chapter 2, the vapochromic and vapoluminescent properties of both [(C6H11NC)2Au](PF6) and [(C6H11NC)2Au](AsF6) were further investigated to uncover the first observed single-crystal-to-single-crystal phase transition, verified by single crystal X-ray diffraction, of both species. A rare case of a two-polymorph single crystal of each species was achieved as well. With no vapor molecules incorporated in these crystals, the mechanism of conversion was further examined at the macroscopic, microscopic, and atomic level to understand how these solvent-free crystals transform from solvent vapor exposure. Chapter 3 focuses on methods to isolate [(C6H11NC)2Au]+ to form non-luminescent crystals, which was achieved through bulky noncoordinating anions and solvent molecules. Newly synthesized [(C6H11NC)2Au](BArF24) was crystallized but showed no further interesting properties other than purposely isolating aurophilic interactions. However, the first solvates of these [(C6H11NC)2Au]+ series, C6H6·[(C6H11NC)2Au](AsF6) and C6H6·[(C6H11NC)2Au](SbF6), were crystallized that displayed a unique turning on of luminescence when left to dry that matched their solvent-free forms, as verified by powder X-ray diffraction, infrared spectroscopy, and fluorescence spectroscopy. Differing from the other studies, Chapter 4 examines the structure and luminescence of three-coordinate 2,2'-bipyridine gold(I) tertiary phosphine crystals. Separate isomorphic series of [(Ph3P)Au(bipy)]XF6 and [(Et3P)Au(bipy)]XF6 (where X = P, As, or Sb) along with binuclear [[mu]2-bipy(AuPPh3)2](PF6)2 were crystallized and showed no luminescence, which is unlike that of known strongly luminescent gold(I) phosphines. However, the three-coordinate [(Ph3P)Au(bipy)]XF6 and [(Et3P)Au(bipy)]XF6 complexes all displayed significantly unsymmetrical coordination of the gold(I) to the two nitrogen atoms in the 2,2'-bipyridine ligand. These large unsymmetrical distances were further investigated.
Download or read book Synthesis and Characterization of Luminescent Gold III Complexes written by Amanda N. Sulicz and published by . This book was released on 2017 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of cyclometalated gold(III) has been relatively slow to emerge, but recent advances in catalyst and material design have driven a renewed interest. Reported here are synthetic, structural, and optical studies of cyclometalated gold(III) aryl complexes. These new complexes show ligand-centered luminescence that is perturbed by the heavy-atom effect of gold. Traditionally, metal-carbon bond formation relied on organometallic complexes of electropositive elements, including lithium and magnesium. The easily reducible nature of gold(III) often interferes with these conventional reagents, thus resulting in the use of toxic metals like mercury or thallium. Reported here is the use of palladium-catalyzed Suzuki-Miyaura cross-coupling for the attachment of aryl ligands to cyclometalated gold(III) chloride complexes. The resulting di- and mono-arylated species were luminescent. Several complexes have been crystallographically characterized. Luminescent derivatives of a previously published gold(III) chloro precursor, initially reported for catalytic purposes, were prepared through boron transmetalation reactions. Complexes bearing both aryl and cyanide ligands were synthesized. These luminescent materials are diamagnetic and were be characterized by multinuclear NMR, absorption and emission spectroscopies (including time-resolved emission), and by X-ray diffraction crystallography. The synthesized gold(I) complexes were designed to display reverse saturable absorption and be a two photon acceptor. The BTF (BTF = 2-(9,9’-diethyl-9H-fluoren-2-yl)-benzothiazole) ligand was chosen as it has been previously demonstrated to have favorable photophysical effects on platinum(II) and ruthenium(II) complexes for applications in photodynamic therapy and optical power limiting (OPL). Gold(I) complexes with the BTF ligand are sought for potential OPL applications. Synthesized complexes are luminescent and were characterized by multinuclear NMR, absorption and emission spectroscopies, photoluminescent quantum yields, time-resolved emission. Two complexes were crystallographically characterized.
Download or read book Synthesis Characterization and Photoluminescence Studies of Gold one Complexes written by Tiffany Anne Grant and published by . This book was released on 1998 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Synthesis of Gold and Zirconia Nanoparticles and Their Characterization written by Stephan Dankesreiter and published by Diplomica Verlag. This book was released on 2011 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of small and smallest particle is one of today's key features in modern science. The goal is to form materials with improved properties than their "classical" ancestors with just a fractional amount of raw material. However, the characterization of these particles is as important as their way of preparation. Different techniques with their origins in physics, inorganic, organic and physical chemistry have to be combined to reveal the secrets of this important field of science. This book gives a short overview of theoretical basics and synthesis methods to form and characterize gold and zirconia nanoparticles. Phenomenon like plasmon resonance self-assembly of surfactants and the different structures of ZnO2 are explained. Furthermore, analytical tools, like small angle X-ray scattering, X-ray powder diffraction and scanning electron microscopy are introduced. In addition, details on the synthesis of gold and zirconia nanoparticles are presented and are examined by the mentioned analytical and calorimetric methods.
Download or read book Synthesis and Luminescence Studies of Homo and Heteronuclear Complexes of Gold and Copper written by Chui-Ling Chan and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural and Luminescence Studies of Novel Gold I Complexes written by Rochelle Leah Morris and published by . This book was released on 2003 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold Chemistry written by Mohr and published by John Wiley & Sons. This book was released on 2009-03-12 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by world-class authors, this most recent major book on the topic highlights new and current trends as well as future directions. It is comprehensive in its scope, covering all aspects of gold chemistry -- from homogeneous to heterogeneous catalysis, from supramolecular assemblies to sensors and medicinal applications. The result is an invaluable work for both organic and inorganic chemists working in universities and industry, as well as material scientists.
Download or read book Design Synthesis and Characterization of Luminescent Dinuclear and Polynuclear Complexes of Gold I and Platinum II with Alkynylcalix 4 arene and Bridging Sulfido Ligands written by 侯嘉華 and published by . This book was released on 2014 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Biological Evaluation of DNA targeted Gold I Complexes written by Lauren Christine Eiter and published by . This book was released on 2007 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural and Luminescence Studies of Homometallic Gold I and Heterometallic Gold I silver I Complexes written by Daniel Rios and published by . This book was released on 2008 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Chemistry with Gold nitrogen Complexes written by Hanan Elsayed Abdou and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen ligands have been little studied with gold(I) and almost no chemistry has been described using anionic bridging nitrogen ligands. This dissertation concerns the impact of the bridging ligands amidinate, ArNHC(H)NAr, on the chemistry of gold(I) and, in particular, the effect of substituents on the molecular arrangement. The electronic vs. steric effect of the substituents on the molecular arrangement of gold(I) amidinates complexes is studied in detail. Tetra-, tri-, and dinuclear gold(I) amidinate complexes are synthesized and characterized using X-ray diffraction. Spectroscopic and electrochemical studies of the amidinate complexes are described. Catalytic studies suggest that gold amidinates and related gold nitrogen complexes are the best catalyst precursors for CO oxidation on TiO2 surface reported to date (87% conversion). The dinuclear gold(I) amidinate complex with a Au ... Au distance of 2.711(3) [angstrom] is rare. To our knowledge, there is only one other example of a symmetrical dinuclear gold(I) nitrogen complex. Oxidative-addition reactions to the dinuclear gold(I) complex, [Au2(2,6-Me2-form)2] are studied in detail and result in the formation of gold(II) complexes. The gold(II) amidinate complexes are the first formed with nitrogen ligands. The complexes are stable at room temperature. Mixed ligand tetranuclear gold(I) clusters and tetranuclear mixed Au-Ag metal clusters of pyrazolate and amidinate ligands are synthesized and characterized using Xray diffraction.
Download or read book Gold and Silver Nanoparticles written by Suban K. Sahoo and published by Elsevier. This book was released on 2023-01-15 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gold and Silver Nanoparticles: Synthesis and Applications provides detailed information on the preparation and utilization of Au- and Ag-based nanoparticles in a range of novel areas. Gold and silver nanoparticles offer a range of interesting properties, including unique size-dependent optoelectronic properties, chemical stability and biocompatibility, ease of synthesis and surface modification, excellent resistance to corrosion, and catalytic properties, hence paving the way to a wide range of cutting-edge applications with continual advances and innovations. Sections introduce gold and silver nanoparticles, fundamental theory, synthesis, and characterization techniques before focusing on requirements and preparation methods. Specific applications areas, such as surface-enhanced Raman spectroscopy (SERS), sensing and biosensing, imaging, drug and gene delivery, disease diagnosis, catalysis, and optoelectronic device fabrication are covered. Finally, synthesis and applications of platinum- and palladium-based nanoparticles are discussed. This is a valuable resource for researchers and advanced students across nanoscience and nanotechnology, chemistry, and materials science, as well as scientists, engineers, and R&D professionals with an interest in noble metal nanomaterials for a range of industrial applications. Explains theory, synthesis, characterization, and properties of Au- and Ag- based nanoparticles Explores a range of novel applications across biomedicine, optoelectronics, and other areas Analyzes the latest developments in the field and considers noble metal nanoparticles beyond gold and silver
Download or read book Synthesis and Physical Characterization of Silver I and Triethylphosphine Gold I Complexes written by Mohamed Muftah El-Etri and published by . This book was released on 1978 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Organic Derivatives of Gold and Silver written by Saul Patai and published by Wiley-Blackwell. This book was released on 1999-10-18 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 100th volume in this highly successful and renowned Patai andRappoport series 'The Chemistry of Functional Groups' is fittinglydevoted to the precious metals, gold and silver. Gold is a soft metal occurring naturally as particles in quartz oras nuggets. Gold was initially used extensively in coinage andjewellery and has recently found applications in biochemistry,medicine and material science. Gold readily forms organometalliccompounds (R-Au-L with L = sulphide, phosphine and isocyanide),oxides and halides. Silver is a ductile metal which was used incoinage and for mirrors. It is now used for jewellery, electricalconductors, dental and surgical components. Silver forms stablesilver halides for use in Photography and i.r. spectroscopy as asupport material. Other silver compounds are also used incatalysis. This volume contains 16 chapters dealing with calculations onorganogold compounds, physical and spectroscopic properties (NMR,ESR, PES, Mossbauer spectra), thermochemical and analyticalproperties, the synthesis and uses of the title compounds and theirreactions such as rearrangements, pyrolysis and photochemicalreactions. The medicinal use of organogold compounds and theincreased use of gold-thiol monolayers are also summarized. Each of the chapters has been prepared by leading scientists inthis field making this volume invaluable for researchers inacademia and industry working with gold and silver, inbiochemistry, pharmaceutical and materials chemistry. Organic compunds containg Nitrogen are of outstanding importnce inbiochemistry and in environmental systems. This volume gives asound introduction into physical chemistry of amino, nitriso, nitroand related functional groups. This volume is now available in electronic format from BooksOnline.
Download or read book Gold Nanoparticles written by P. E. Chow and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to their attractive electronic, optical, and thermal properties; gold nanoparticles (AuNPs) have emerged with great interest, as well as catalytic properties, in the fields of physics, chemistry, biology, medicine, material science and some interdisciplinary fields. This book examines a broad range of applications of gold nanoparticles such as: gold nanoparticles as an antigen carrier and as an adjuvant; laser synthesis of gold nanoparticles and the control over their properties; gold on carbon catalysts; gold nanoparticles as a delivery vehicle in biomedical applications; solution and solid-state methods to prepare Au nanoparticles; gold nanoparticles and their in-vitro property, the usefulness of gold nanoparticles in emerging infectious disease situations and a host of others.
Download or read book Synthesis and Characterization of Gold I Complexes of Bis diphenylphosphino acetonitrile written by Sicelo Vincent Sithole and published by . This book was released on 2010 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Monomeric Gold I Complexes written by Corey R. Hunter and published by . This book was released on 2004 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Au(I) monomers are key precursors to the formation of heterobimetallic Au(I)-metal species which have great potential as OLED's (organic light-emitting diode) displays, VOC (volatile organic compound) sensors, and antiarthritis drugs. The monomeric compounds were characterized by 1H and 31P NMR spectroscopy, and the connectivity of a representative sample was established using 1H-1H correlation experiments.
