Complexation Studies of Mixed-donor Ligands with the Heavy Metal Ions Hg(II) and Cd(II) PDF Download
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Author: Maikel Elia Botros
Publisher:
ISBN:
Category : Ligands
Languages : en
Pages : 108
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Author: Maikel Elia Botros
Publisher:
ISBN:
Category : Ligands
Languages : en
Pages : 108
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Author: Leslie Ann Greenbauer
Publisher:
ISBN:
Category : Complex compounds
Languages : en
Pages : 330
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Author: Mikhaila D. Ritz
Publisher:
ISBN:
Category : Ligands (Biochemistry)
Languages : en
Pages :
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Group 12 metal ion complexes of mixed N,S donor ligands N-(2-mercaptoethyl) picolylamine (L) and N-(2-pyridylmethyl)-N-(2-(methylthio)ethyl)-N-(2-thioethyl)-amine (L') were studied. Characterization of the known complex ion [Zn(ZnL2)2]2+ was complemented by X-ray crystallography of a new acetonitrile solvate of the perchlorate salt, ESI-MS and variable temperature NMR studies. In addition, five solvates of the novel alkylthiolate bridged mixed metal complex [Hg(ZnL2)2](ClO4)2 were formed through either indirect and direct methods. Further characterization of the mixed metal complexes was done through variable temperature NMR, ESI-MS and X-ray crystallography. In addition, an unusual bicyclo spiro [5.5] complex with formula [Zn((ZnL')2(m-OH))2](ClO4)4 was prepared and characterized by X-ray crystallography. Characterization of this complex in acetonitrile solution by variable temperature NMR and ESI-MS studies indicated possible formation of a (ZnL¢)4+4 macrocycle as observed for Hg(II) with L', but no evidence for the carbonate complexes formed by Cd(II) with L'.
Author: Wei Lai
Publisher:
ISBN:
Category : Heavy metals
Languages : en
Pages : 152
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Author: Roland Joseph Smith
Publisher:
ISBN:
Category : Complex compounds
Languages : en
Pages : 42
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Author: Tia Louise Walker
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 287
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Following the structural characterization and analysis of Blue Copper Proteins (BCP's), macrocyclic ligands have attracted much interest as simple models for naturally occurring metal-macrocycle centers. Presented in this dissertation are the syntheses and characterization of small, simple organic analogs of BCP's. Chapter I of this work gives a brief literature review of Blue Copper Proteins, including their unique spectral characteristics. The synthesis and characterization of several linear and cyclic molecular analogs will be discussed including polythiaethers,3 polyazacycloalkanes,4 thia-aza5 and trithiaethers. The macrocyclic effect will be explained and why cyclic molecular analogs are of current interest. Presented in the second chapter are the syntheses of two 14-membered rings with a 2,3,2,3 altering carbon chain arrangement for 1,8-dithia-4,11-diazacyclotetradecane and 1,11-dithia-4,8-diazacyclotetradecane. The 1,8-dithia-4,11-diazacyclotetradecane is complexed to both Cu2+ and Cu+ and fully characterized using UV-Vis, EPR and CV. The 1,11-dithia-4,8-diazacyclotetradecane was synthesized for structural X-ray comparison of the Cu2+ metal ion. The 1,8-dithia-4,11-diazacyclotetradecane having two nitrogen atoms also makes it attractive for functionalization. Presented in the third chapter of this dissertation is the expansion of these ligands for use as cryptands. The syntheses of two cryptands are fully described and include crystallographic data. One of the cryptand ligands, 1,8-dithia-4,11,18,21-tetraazatricyclo[10.6.6]pentacosane-25-one was successfully complexed to Cu2+ and those results are also discussed. To further conclude this research is a pendant arm derivative and its synthesis. Each nitrogen atom of 1,8-dithia-4,11-diazacyclotetradecane is functionalized with a four carbon chain connecting to 1,4-diaza-7-thiacyclononane.
Author: Astrid Sigel
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110434334
Category : Science
Languages : en
Pages : 596
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Book Description
Volume 17, entitled Lead: Its Effects on Environment and Health of the series Metal Ions in Life Sciences centers on the interrelations between biosystems and lead. The book provides an up-to-date review of the bioinorganic chemistry of this metal and its ions; it covers the biogeochemistry of lead, its use (not only as gasoline additive) and anthropogenic release into the environment, its cycling and speciation in the atmosphere, in waters, soils, and sediments, and also in mammalian organs. The analytical tools to determine and to quantify this toxic element in blood, saliva, urine, hair, etc. are described. The properties of lead(II) complexes formed with amino acids, peptides, proteins (including metallothioneins), nucleobases, nucleotides, nucleic acids, and other ligands of biological relevance are summarized for the solid state and for aqueous solutions as well. All this is important for obtaining a coherent picture on the properties of lead, its effects on plants and toxic actions on mammalian organs. This and more is treated in an authoritative and timely manner in the 16 stimulating chapters of Volume 17, which are written by 36 internationally recognized experts from 13 nations. The impact of this recently again vibrant research area is manifested in nearly 2000 references, over 50 tables and more than 100 illustrations (half in color). Lead: Its Effects on Environment and Health is an essential resource for scientists working in the wide range from material sciences, inorganic biochemistry all the way through to medicine including the clinic ... not forgetting that it also provides excellent information for teaching.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 826
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Author: Dhiraj Sud
Publisher: CRC Press
ISBN: 1000630110
Category : Technology & Engineering
Languages : en
Pages : 311
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Book Description
In the manufacturing sector, nanomaterials offer promising outcomes for cost reduction in production, quality improvement, and minimization of environmental hazards. This book focuses on the application of nanomaterials across a wide range of manufacturing areas, including in paint and coatings, petroleum refining, textile and leather industries, electronics, energy storage devices, electrochemical sensors, as well as in industrial waste treatment. This book: Examines nanofluids and nanocoatings in manufacturing and their characterization. Discusses nanomaterial applications in fabricating lightweight structural components, oil refining, smart leather processing and textile industries, and the construction industry. Highlights the role of 3D printing in realizing the full potential of nanotechnology. Considers synthetic strategies with a focus on greener protocols for the fabrication of nanostructured materials with enhanced properties and better control, including these materials' characterization and significant properties for ensuring smart outputs. Offers a unique perspective on applications in industrial waste recycling and treatment, along with challenges in terms of safety, economics, and sustainability in industrial processes. This work is written for researchers and industry professionals across a variety of engineering disciplines, including materials, manufacturing, process, and industrial engineering.
Author: Joan E. McLean
Publisher:
ISBN:
Category : Hazardous waste sites
Languages : en
Pages : 28
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