Download or read book Solvatochromism in Metal Complexes written by A.A. Emara Adel and published by LAP Lambert Academic Publishing. This book was released on 2014 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview in recent progress in the field of solvatochromism in new mixed-ligand copper(II) complexes containing the bidentate di-nitrogen ligands and bidentate di-oxygen ligands. Copper(II) complexes were prepared and characterized by elemental analysis, infrared, mass and ESR spectral data, magnetic and molar conductance measurements and thermal gravimetric analysis. From the investigation, the geometries of the complexes are square planar for perchlorate complexes, square pyramid or octahedral for the nitrate complexes and octahedral for the bromide complexes. Thermal and kinetic parameters for the nitrate complexes are investigated. The kinetic parameters (E, A, ΔG, ΔH, ΔS) of all thermal decomposition stages were calculated using the Coats-Redfern and other standard equations. Solvatochromic behavior of some copper(II) complexes indicates strong solvatochromism of their solutions in polar and non-polar solvents. The observed solvatochromism is due to the solute-solvent interaction between the chelate cation and the solvent molecules.
Download or read book Solvatochromism of Dinuclear Complexes An Alternative Explanation written by and published by . This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solvatochromism refers to changes in electronic absorption spectra with solvent. Although most, if not all, complexes are solvatochromic to some extent, the term is usually applied to species which show shifts in energy of at least a few hundred wavenumbers with variation in solvent. The very large solvatochromism of the metal to ligand charge transfer transitions in various, formally non-polar, ligand-bridged dinuclear metal carbonyl complexes is discussed. The similarity of this behaviour to that of related mononuclear species and the good correlations obtained with the 'polar' part of McRae's equation are used to demonstrate that dipole-dipole interactions are the main cause of the solvatochromism. This contradicts previous explanations which have attributed the solvatochromism to changes in dispersion forces. It is concluded that, in the simplest approximation, the molecules may be regarded as two polar halves, each of which interacts with the solvent. Detailed interpretation in terms of McRae's equation is not possible without knowing whether the metal to ligand charge transfer excited state is localized on one metal center or delocalized over both. The data available do not allow us to distinguish between these possibilities.
Download or read book Colour of Metal Compounds written by Adam Bartecki and published by CRC Press. This book was released on 2000-05-01 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Colour of Metal Compounds is devoted to the qualitative and quantitative treatment of colour in inorganic and coordination compounds. In order to understand the use of colour as a source of structural and analytical information, the book explains in depth the interrelation between colour and structural properties of compounds. Trichromatic colorimetry is introduced as a method for the quantitative evaluation of colour. Further chapters cover chromaticity and spectroscopy, lanthanides, colour centres, colour in mineralogy, pigments, coloured glass, and the colour use in teaching. Fully revised from the original Polish edition, this book is recommended as a supplementary text for undergraduate and graduate level courses on transition metal chemistry, coordination chemistry, spectroscopy and colour chemistry. It will also be of interest to researchers in chemistry, physics, mineralogy and the pigment and glass industry.
Download or read book Inorganic Thermochromism written by Kozo Sone and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first monograph containing an elementary and comprehensive review of inorganic thermochromism and certain related chromotropic phenomena, like piezo- and solvatochromism. Certain metal complexes and chelates show changes in colour upon heating and cooling or compressing their solutions; or have different colours in different solvents. Even in solid state, colour changes can be observed with heating and pressure. With structural elucidations and spectral measurements, these chromotropic phenomena can be interpreted in terms of modern inorganic chemistry theories.
Download or read book Solvatochromism written by Paul Suppan and published by . This book was released on 1997 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a summary of the current knowledge about the effect of the environment on molecular electronic spectra - "environment" being taken in the broadest sense, to cover gaseous and condensed phase matter as well as organised molecular assemblies and biological specimens. Although solvatochromism has now been a very active area of research for many years, this is the first and only book to have been published which is devoted entirely to the subject, and it succeeds in providing a comprehensive overview of the field, with a selection of references for more detailed information. The main part of the book is concerned with experimental observations, whilst the theoretical section concentrates on the simplest electrostatic methods. The effects of the medium on the energies and intensities of electronic transitions are related to the solvation energies of the various electronic states of the solute molecules, providing important information about the nature and properties of their surroundings. Solvatochromism will be of interest not only to the specialist researcher in this field, but also to scientists and medical practitioners, for example, who take a more empirical approach to the environmental effects on adsorption and luminescence spectra.
Download or read book Comprehensive Coordination Chemistry II written by J. A. McCleverty and published by Newnes. This book was released on 2003-12-03 with total page 11845 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Coordination Chemistry II (CCC II) is the sequel to what has become a classic in the field, Comprehensive Coordination Chemistry, published in 1987. CCC II builds on the first and surveys new developments authoritatively in over 200 newly comissioned chapters, with an emphasis on current trends in biology, materials science and other areas of contemporary scientific interest.
Download or read book Solvatochromism of the Homoleptic Coordination Complex Hexammine Nickel Tetrafluoroborate Ni NH3 6 BF4 2 written by Andrew Gary Meguerdichian and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photochemistry and Photophysics of Earth Abundant Transition Metal Complexes written by and published by Elsevier. This book was released on 2024-05-28 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Inorganic Chemstry serial highlights new advances in the field with this new volume presenting interesting chapters. Each chapter is written by an international board of authors. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in Advances in Inorganic Chemistry serials Updated release includes the latest information on Photochemistry and Photophysics of Earth-Abundant Transition Metal Complexes
Download or read book Solvatochromism of the Homoleptic Coordination Complex Hexammine Nickel Tetrafluoroborate Ni NH3 6 BF4 2 written by Andrew Gary Meguerdichian and published by . This book was released on 2013 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Topics in Fluorescence Spectroscopy written by Joseph R. Lakowicz and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-resolved fluorescence spectroscopy is widely used as a research tool in bioch- istry and biophysics. These uses of fluorescence have resulted in extensive knowledge of the structure and dynamics of biological macromolecules. This information has been gained by studies of phenomena that affect the excited state, such as the local environment, quenching processes, and energy transfer. Topics in Fluorescence Spectroscopy, Volume 4: Probe Design and Chemical Sensing reflects a new trend, which is the use of time-resolved fluorescence in analytical and clinical chemistry. These emerging applications of time-resolved fluorescence are the result of continued advances in laser detector and computer technology. For instance, pho- multiplier tubes (PMT) were previously bulky devices. Miniature PMTs are now available, and the performance of simpler detectors is continually improving. There is also considerable effort to develop fluorophores that can be excited with the red/ne- infrared (NIR) output of laser diodes. Using such probes, one can readily imagine small time-resolved fluorometers, even hand-held devices, being used fordoctor’s office or home health care.
Download or read book Solvents and Solvent Effects in Organic Chemistry written by Christian Reichardt and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: In most cases, every chemist must deal with solvent effects, whether voluntarily or otherwise. Since its publication, this has been the standard reference on all topics related to solvents and solvent effects in organic chemistry. Christian Reichardt provides reliable information on the subject, allowing chemists to understand and effectively use these phenomena. 3rd updated and enlarged edition of a classic 35% more contents excellent, proven concept includes current developments, such as ionic liquids indispensable in research and industry From the reviews of the second edition: "...This is an immensely useful book, and the source that I would turn to first when seeking virtually any information about solvent effects." —Organometallics
Download or read book Inorganic Chromotropism written by Yutaka Fukuda and published by Springer. This book was released on 2010-10-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an up-to-date and comprehensive work that presents various kinds of reversible color changes of inorganic coordination compounds due to changes in the chemical and physical surrounding conditions. Graduate students and young chemists starting out on their research, as well as scientists trying to synthesize and characterize new colored coordinate materials will find this a uniquely essential text.
Download or read book Solvatochromism of Non Polar Complexes written by and published by . This book was released on 1989 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Solvatochromism of various, formally non-polar, complexes is analysed using the McRae equation. The solvatochromism of the dinuclear species, M(CO)42(ppm). (Molybdenum, Tungsten; bpm = 2,2'bipyrimidine) is found to result from the individual dipoles of each half of the molecule interacting with the solvent. This is contrary to previously published explanations. The solvatochromism of non-polar Ru(DTBSq)3 (DTBSq = 3,5-di-t-butylseniquinone) is also found, unexpectedly, to correlate with the polar terms of McRae's equation. Possible reasons for this are discussed.
Download or read book Highlights in Solute Solvent Interactions written by Wolfgang Linert and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most organic molecules retain their integrity when dissolved, and even though in such cases the effects exerted by solvents are, in the language of the coordination chemist, of the "outer sphere" kind, the choice of solvent can be critical to the successful outcome of an operation or preparation. Solubilities of reactants and products must be taken into account, and even if the organic principals in the reactions retain their integrity, many of the reagents are electrolytes, and their state of aggregation will affect their reactivity. In testifying to the importance of understanding solute-solvent interactions I draw attention to a large class of inorganic species for which the involvement in the chemical and physical properties by the solvent is even more deeply seated. It is comprised by the large body of metal atoms in low oxidation states for which solvent molecules intervene as reagents. At the same time, because the ions carry charges, the effects arising from outer sphere interactions are usually greater than they are for neutral molecules. To cite an example: when FeCb(s) is dissolved in water to form a dilute - say O. OlO- solution there is a complete reorganization of the coordination sphere of the cation. Whereas in the solid each cation is surrounded by six chloride ions, in the solution the dominant form is [Fe(H20)6]3+ followed by [Fe(H20)sCI]2+, [Fe(H20)4CI2]+, etc. in rapidly decreasing abundance.
Download or read book Chromic Phenomena written by Peter Bamfield and published by Royal Society of Chemistry. This book was released on 2010 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing an entry point both for new researchers and for established ones, this book develops and investigates new applications for colour chemistry.
Download or read book The Chemistry of Metal Enolates 2 Volume Set written by Jacob Zabicky and published by John Wiley & Sons. This book was released on 2009-05-06 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Enolates form a class of compounds that have recently received much study because of their part in the important C-C-bond forming aldol reaction. Focusing on this important class of compounds in organic synthesis, The Chemistry of Metal Enolates features contributions on all aspects of Metal Enolate chemistry from the world?s leading experts. Delivering the exceptional quality that?s expected from the Patai Series, this text is essential reading for organic chemists.
Download or read book Chemical Photocatalysis written by Burkhard König and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-04-06 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: Visible light is an abundant source of energy. While the conversion of light energy into electrical energy (photovoltaics) is highly developed and commercialized, the use of visible light in chemical synthesis is far less explored. Chemical photocatalysts that mimic principles of biological photosynthesis utilize visible light to drive endothermic or kinetically hindered reactions.
