Author: Ming ZhouPublisher:
ISBN:
Category :
Languages : en
Pages : 222
Book Description
A New Synthesis of Α-diones and Its Application in the Synthesis of Nickel Dithiolene Near-IR Dyes
Author: Ming ZhouA New Synthesis of [alpha]-diones and Its Application in the Synthesis of Nickel Dithiolene Near-IR Dyes
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Author: Ming ZhouAmerican Doctoral Dissertations
Author: Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 800
Book Description
Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 736
Book Description
The Synthesis and Characterization of Dithiolenes with Intense Electronic Transitions in the Near-IR Region Near 1.5 Microns
Author: Dong Ihl YoonPublisher:
ISBN:
Category : Inorganic compounds
Languages : en
Pages : 190
Book Description
Computer-aided Design and Modeling of Nickel Dithiolene Near-infrared Dyes. 1998 Summer Research Program for High School Juniors at the University of Rochester's Laboratory for Laser Energetics
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
Recent advances in computational chemistry have made it feasible to design many types of molecules and predict their properties theoretically. The author applied these techniques to the design of organometallic transition-metal dyes absorbing in the near-infrared region of the spectrum which possess the combination of a large molar extinction coefficient, good chemical and thermal stability, and a high solubility in liquid crystal (LC) hosts. These properties are required for the dye to function as a near-infrared (IR) attenuator in a liquid crystal point diffraction interferometer (LCPDI) device that will be used as a beam diagnostic on the 60-beam OMEGA solid-state Nd:glass laser system at the University of Rochester's Laboratory for Laser Energetics. Using commercially available software, both the absorption spectra and solubility characteristics of bis[1,2-di-(p-n alkoxyphenyl)ethane-1,2-dithione] nickel dye complexes were modeled in an isotropic host (cyclohexane) and, in most cases, excellent agreement was found with experimental data. Two additional compounds utilizing the same nickel dithiolene core but with alkylthio and phenylalkylthio terminal groups have been designed and show excellent potential to produce dramatic improvements in both solubility and optical density (absorbance) in liquid crystalline hosts. Based upon my work, a new dye not previously reported, 2(C4S)2(C4SPh)DTNi, has been proposed to satisfy the LCPDI device requirements. The nickel dithiolene dyes may also find important applications in other technology areas such as near-IR photography and laser-based near-IR communications.
Organic Synthesis Using Samarium Diiodide
Author: David J. ProcterPublisher: Royal Society of Chemistry
ISBN: 1847551106
Category : Science
Languages : en
Pages : 221
Book Description
Samarium diiodide is one of the most important reducing agents available to synthetic organic chemists. The lanthanide(II) reagent acts by single-electron transfer to organic substrates leading to the formation of both radical and/or anionic intermediates. The power of the reagent arises from its versatility - samarium diiodide can be used in processes ranging from functional group conversions to elaborate carbon-carbon bond-forming cyclization sequences that result in a dramatic increase in molecular complexity. In addition, reactions involving samarium diiodide often show high stereoselectivity as samarium ions can coordinate to Lewis basic sites on substrates and can direct the stereochemical course of reactions. The ability to fine-tune the reactivity of the reagent by the use of additives and co-solvents is an additional, attractive feature. Although samarium diiodide is used extensively by organic chemists, there is still a widely held view that the reagent can be difficult to prepare and use. In addition, samarium diiodide can mediate such a wide variety of organic chemistry that potential new users are often overawed by the extensive primary literature on the reagent. The objective of this book is to provide a concise, practical guide to the reagent. Rather than being a comprehensive review of the chemistry of samarium diiodide, this user-friendly book adopts an "an all you need to know" approach to the topic. The international authors are well-known for their work with the reagent and their expertise covers current developments in new reactivity and selectivity, applications in target synthesis, co-solvent and additive effects, coordination chemistry and mechanism. The book includes the best methods for preparing and handling the reagent, how solvents, co-solvents and additives alter reactivity, the basic mechanisms of reactions, common transformations using the reagent, and emerging areas in samarium diiodide chemistry. The authors have distilled the extensive primary literature to allow the reader to quickly grasp an understanding of the reagent and its utility. The illustrative practical procedures help the reader to prepare and use the reagent in the laboratory while references from the recent literature allow readers to pursue their interest in the popular reagent. The book also contains many illustrations and chemical schemes.
Dianion Chemistry in Organic Synthesis
Author: Charles M. ThompsonPublisher: CRC Press
ISBN: 9780849378683
Category : Science
Languages : en
Pages : 264
Book Description
Many laboratories were reluctant at first to embrace dianion chemistry as part of the standard reaction repertoire. Today, however, researchers can comfortably draw upon the dianion literature to choose an abundance of reagents and strategies that are reliable, effective, and, in many cases, the best answer to a synthetic problem. This interesting book introduces, surveys, and consolidates carbon-based dianion chemistry. Chapter 1 serves as an introduction and as an index of the various dianions covered in the book. Chapters 2 through 5 cover the ensemble of dianion types designated by their first deprotonation site. Each chapter contains an experimental section that explains relevant protocols.
Author: Alexander Nezlin
Author: Scott Thomas Meehan