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Energy Transfer Processes In Polynuclear Lanthanide Complexes
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Book Synopsis Energy Transfer Processes in Polynuclear Lanthanide Complexes by : Shun Omagari
Download or read book Energy Transfer Processes in Polynuclear Lanthanide Complexes written by Shun Omagari and published by Springer. This book was released on 2019-01-17 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the luminescence mechanism of polynuclear lanthanide complexes, focusing on energy transfer processes using a combination of experimental and theoretical approaches. Lanthanide complexes show intense luminescence from the lanthanide ion through sensitization by the organic ligands. The high chromaticity of the emission and the long lifetimes of the complexes are particularly attractive for applications such as organic light-emitting diodes and bioprobes. Polynuclear lanthanide complexes (coordination polymers and clusters) have attracted considerable interest for functionalization by energy transfer between lanthanide ions. At the same time, such extra processes complicate the luminescence mechanism, hindering the rational design of functional polynuclear lanthanide complexes. Firstly, the book explains the principle of the theoretical methods, and then describes the concentration-quenching mechanism in coordination polymers. It also examines the effect of intrinsic spin–orbit coupling arising from lanthanide ions on the ligand-to-lanthanide energy transfer efficiency and the mechanism of back energy transfer (the opposite of sensitizing energy transfer) in lanthanide clusters. This sets the stage for the final topic: the suppression of back energy transfer by energy transfer between lanthanide ions in lanthanide clusters, which is of critical importance, showing that the lanthanide clusters can be considered a new generation of functional and efficient luminescent material and could also provide a breakthrough in lanthanide photophysics.
Book Synopsis Energy Transfer Processes and Quenching Pathways in Lanthanide Complexes: The Role of Structural Changes by : Daniel Kocsi
Download or read book Energy Transfer Processes and Quenching Pathways in Lanthanide Complexes: The Role of Structural Changes written by Daniel Kocsi and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theory and Application of Rare Earth Materials by : Changzhen Wang
Download or read book Theory and Application of Rare Earth Materials written by Changzhen Wang and published by Springer Nature. This book was released on 2023-05-18 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book starts with a theoretical introduction of the rare earth materials, and it subsequently analyzes the essential characteristics of these materials from elements, compounds to physical chemistry and metal materials, etc. Under the supplementary explanation of experimental data and results, the research is gradually guided into the multi-domain application scene. Through extensive analyses, this book displays comprehensively the distinguished values of the rare earth materials and the theoretical, empirical, and practical significance of rare earth materials is unraveled. It also covers an exhaustive review of 17 rare earth elements, their characteristics, and more possibilities in physical chemistry, functional materials, metallurgy, composites and engineering, and their prospects in production and technical applications. In-depth account of the whole spectrum of rare earth material research makes this book a unique reference to academic researchers, students, and engineers.
Book Synopsis Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials by : Ana de Bettencourt-Dias
Download or read book Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials written by Ana de Bettencourt-Dias and published by John Wiley & Sons. This book was released on 2014-11-17 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book presents the theoretical principles, current applications and latest research developments in the field of luminescent lanthanide complexes; a rapidly developing area of research which is attracting increasing interest amongst the scientific community. Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials begins with an introduction to the basic theoretical and practical aspects of lanthanide ion luminescence, and the spectroscopic techniques used to evaluate the efficiency of luminescence. Subsequent chapters introduce a variety of different applications including: • Circularly polarized luminescence • Luminescence bioimaging with lanthanide complexes • Two-photon absorption of lanthanide complexes • Chemosensors • Upconversion luminescence • Excitation spectroscopy • Heterometallic complexes containing lanthanides Each chapter presents a detailed introduction to the application, followed by a description of experimental techniques specific to the area and an extensive review of recent literature. This book is a valuable introduction to the literature for scientists new to the field, as well as providing the more experienced researcher with a comprehensive resource covering the most relevant information in the field; a ‘one stop shop’ for all key references.
Book Synopsis Lanthanide Luminescence by : Pekka Hänninen
Download or read book Lanthanide Luminescence written by Pekka Hänninen and published by Springer Science & Business Media. This book was released on 2011-06-21 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lanthanides have fascinated scientists for more than two centuries now, and since efficient separation techniques were established roughly 50 years ago, they have increasingly found their way into industrial exploitation and our everyday lives. Numerous applications are based on their unique luminescent properties, which are highlighted in this volume. It presents established knowledge about the photophysical basics, relevant lanthanide probes or materials, and describes instrumentation-related aspects including chemical and physical sensors. The uses of lanthanides in bioanalysis and medicine are outlined, such as assays for in vitro diagnostics and research. All chapters were compiled by renowned scientists with a broad audience in mind, providing both beginners in the field and advanced researchers with comprehensive information on on the given subject.
Book Synopsis Energy Transfer in Lanthanide Complexes by : Ian Michael Clarkson
Download or read book Energy Transfer in Lanthanide Complexes written by Ian Michael Clarkson and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook on the Physics and Chemistry of Rare Earths by : Jean-Claude G. Bunzli
Download or read book Handbook on the Physics and Chemistry of Rare Earths written by Jean-Claude G. Bunzli and published by Elsevier. This book was released on 2022-11-04 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook on the Physics and Chemistry of Rare Earths: Including Actinides, Volume 62, the latest release in this continuous series that covers all aspects of rare earth science, including chemistry, life sciences, materials science and physics, presents interesting chapters on a variety of topics, with this release including sections on Lanthanide calixarene complexes and their applications, Recent developments in lanthanide-based single-molecule magnets, Rare earth permanent magnets, and the Importance of Ligand Design in Lanthanide Azamacrocyclic Complexes Relevant to Biomedical Applications. Presents up-to-date overviews and new developments in the field of rare earths, covering both their physics and chemistry Contains individual chapters that are comprehensive and broad, along with critical reviews Provides contributions from highly experienced, invited experts
Book Synopsis Metal-Containing Polymeric Systems by : John E. Sheats
Download or read book Metal-Containing Polymeric Systems written by John E. Sheats and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on metal-containing polymers began in the early 1960's when several workers found that vinyl ferrocene and other vinylic transition metal u -com plexes would undergo polymerization under the same conditions as conventional organic monomers to form high polymers which incorporated a potentially reactive metal as an integral part of the polymer structures. Some of these materials could act as semi-conducters and pos sessed one or two dimensional conductivity. Thus appli cations in electronics could be visualized immediately. Other workers found that reactions used to make simple metal chelates could be used to prepare polymers if the ligands were designed properly. As interest in homo geneous catalysts developed in the late 60's and early 70's, several investigators began binding homogeneous catalysts onto polymers, where the advantage of homo geneous catalysis - known reaction mechanisms and the advantage of heterogeneous catalysis - simplicity and ease of recovery of catalysts could both be obtained. Indeed the polymer matrix itself often enhanced the selectivity of the catalyst.
Book Synopsis Journal by : American Chemical Society
Download or read book Journal written by American Chemical Society and published by . This book was released on 2004 with total page 1450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook on the Physics and Chemistry of Rare Earths by :
Download or read book Handbook on the Physics and Chemistry of Rare Earths written by and published by Elsevier. This book was released on 2015-10-14 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook on the Physics and Chemistry of Rare Earths is a continuing series of books covering all aspects of rare earth science, including chemistry, life sciences, materials science, and physics. The handbook emphasizes rare earth elements [Sc, Y and the lanthanides (La through Lu)] but, when relevant, information also is included about the closely related actinide elements. The individual chapters are comprehensive, broad, up-to-date critical reviews written by highly experienced invited experts. The series, which was started in 1978 by Professor Karl A. Gschneidner, Jr., combines and integrates both the fundamentals and applications of these elements and now publishes two volumes a year. Covers all aspects of rare earth science, including chemistry, life sciences, materials science, and physics. Includes contributions from highly experienced, invited experts Provides comprehensive, up-to-date critical reviews of developments in the field Combines and integrates both the fundamentals and applications of rare earth elements
Book Synopsis The Study of Energy Transfer and Local Field Effect in Lanthanide Complexes with High and Low Symmetry by : Yuxia Luo
Download or read book The Study of Energy Transfer and Local Field Effect in Lanthanide Complexes with High and Low Symmetry written by Yuxia Luo and published by . This book was released on 2019 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are lots of important applications for lanthanides (Ln) because of their unique properties. The properties are closely linked to the environment of the crystal field. Thus, two kind of crystals Cs2NaLn(NO2)6 with high Th point-group symmetry and LnPO4 with monoclinic symmetry were chosen to study quantum cutting and Stokes shift. Quantum cutting is a kind of down-conversion energy transfer in which one excitation ultraviolet photon is transformed into multiple near infrared photons. This phenomenon has been studied in Cs2NaY0.96Yb0.04(NO2)6. The emission from Yb3+ can be excited via the NO2- antenna. The electronic transition of NO2- is situated at more than twice the energy of the Yb3+. At room temperature, one photon absorbed at 470 nm in the triplet state produced no more than one photon emitted. Some degree of quantum cutting was observed at 298 K under 420 nm excitation into the singlet state and at 25 K using excitation into singlet and triplet state. The quantum efficiency was about 10% at 25 K. In Chapter 3, Stokes shift which is the energy shift between the peak maxima in absorption and emission was studied. Stokes shift is related to the flexibility of the lattice and the coordination environment. Cs2NaCe(NO2)6 with 12-coordinated Ce3+ situated at a site of Th symmetry demonstrated the largest Ce-O Stokes shift of 8715 cm−1. The 4f1 ground state and 5d1 potential surfaces have displaced so much along the configuration coordinate that overlap takes place above the 5d1 minimum, leading to thermal quenching of emission at 53 K. A comparison of Stokes shifts with other Ce-O systems with different coordination number demonstrated larger Stokes shifts for Ce3+ ions with higher coordination number. Systematic research about the energy transfer (ET) and energy migration phenomenon is still scarce, although they exist extensively among lanthanide ions. The energy migration in highly doped materials has been stated as very fast or slow, but no experimental proof was reported. In Chapter 4, the ET between Tb3+ and Eu3+ was investigated experimentally and compared with available theoretical models in the regime of high Tb3+ concentrations in 30 nm LaPO4 nanoparticles at room temperature. The ET efficiency approached 100% even for lightly Eu3+-doped materials. The use of pulsed laser excitation and switched-off continuous wave laser diode excitation demonstrated that the energy migration between Tb3+ ions, situated on La3+ sites with a 4 Å separation was not fast. The quenching of Tb3+ emission in singly doped LaPO4 only reduced the luminescence lifetime by about 50% in heavily doped samples. Various theoretical models have been applied to simulate the luminescence decays of Tb3+ and Eu3+-doped LaPO4 samples of various concentrations. The transfer mechanism has been identified as forced electric dipole at each ion. The control of energy transfer rate and efficiency is also an important issue. There are many chemical and geometrical factors that affect energy transfer, including the spectra overlap, the dipole orientation and the distance between the donor and acceptor. The local field of the emission center is another factor that affect the energy transfer by changing the photonic environment. In Chapter 5, the local field effect on the energy transfer between Tb3+ and Eu3+ doped in LaPO4 dispersed in different solvents and solids with a wide range of refractive indexes was studied. The effects of local field (reflected by refractive index) on the ET efficiency and ET rates were clarified that the ET efficiency would decrease with increasing refractive index, while ET rates were independent of the refractive index
Book Synopsis Intermolecular Energy Transfer Between Lanthanide Complexes in Aqueous Solution. 2. Transfer from Terbium (III) to Europium (III) Complexes of Benzenecarboxylic Acids by : Harry G. Brittain
Download or read book Intermolecular Energy Transfer Between Lanthanide Complexes in Aqueous Solution. 2. Transfer from Terbium (III) to Europium (III) Complexes of Benzenecarboxylic Acids written by Harry G. Brittain and published by . This book was released on 1978* with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of the Chemical Society by :
Download or read book Journal of the Chemical Society written by and published by . This book was released on 1992 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inorganic Chemical Biology by : Gilles Gasser
Download or read book Inorganic Chemical Biology written by Gilles Gasser and published by John Wiley & Sons. This book was released on 2014-04-14 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding, identifying and influencing the biological systems are the primary objectives of chemical biology. From this perspective, metal complexes have always been of great assistance to chemical biologists, for example, in structural identification and purification of essential biomolecules, for visualizing cellular organelles or to inhibit specific enzymes. This inorganic side of chemical biology, which continues to receive considerable attention, is referred to as inorganic chemical biology. Inorganic Chemical Biology: Principles, Techniques and Applications provides a comprehensive overview of the current and emerging role of metal complexes in chemical biology. Throughout all of the chapters there is a strong emphasis on fundamental theoretical chemistry and experiments that have been carried out in living cells or organisms. Outlooks for the future applications of metal complexes in chemical biology are also discussed. Topics covered include: • Metal complexes as tools for structural biology • IMAC, AAS, XRF and MS as detection techniques for metals in chemical biology • Cell and organism imaging and probing DNA using metal and metal carbonyl complexes • Detection of metal ions, anions and small molecules using metal complexes • Photo-release of metal ions in living cells • Metal complexes as enzyme inhibitors and catalysts in living cells Written by a team of international experts, Inorganic Chemical Biology: Principles, Techniques and Applications is a must-have for bioinorganic, bioorganometallic and medicinal chemists as well as chemical biologists working in both academia and industry.
Book Synopsis Photoprocesses in Transition Metal Complexes, Biosystems and Other Molecules. Experiment and Theory by : E. Kochanski
Download or read book Photoprocesses in Transition Metal Complexes, Biosystems and Other Molecules. Experiment and Theory written by E. Kochanski and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scope of this paper is to recall fundamental notions of the molecular spectroscopy and dynamics, necessary for discussion of photophysical and photochemical processes in condensed phases. We will thus treat in a more detailed way the specific features which are important for molecular systems strongly interacting with their environment. Other aspects such as the time evolution of isolated molecules, single-level excitation and state-to-state chemistry, important for the gas-phase photophysics are omitted. We start (Sec.2) with a brief description of radiative processes (light absorption and emission) in molecules. In the quantum-mechanical treatment of this problem, the appropriate basis is that of so-called zero-order states, corresponding to the traditional scheme of electronic states (singlets, doublets, triplets etc.) and vibrational levels belonging to each state. The important point will be deduction of selection rules for most radiative transitions. At this stage all molecular states are considered as stationary states. In order to treat the breakdown of simple selection rules and non-radiative transitions between individual molecular states, it is necessary to take into account the mechanisms coupling the zero-order states (Sec.3). We will first focus on intramolecular coupling effects and then discuss the solvent effects on intramolecular relaxation processes. The problem of the non-radiative transfer of the electronic energy between different molecules - closely related to that of the energy dissipation within a single molecule will be treated in Sec.4.
Book Synopsis Proceedings of the First International School on Excited States of Transition Elements, Książ Castle, Poland, June 20-25, 1988 by : Bogusława Jeżowska-Trzebiatowska
Download or read book Proceedings of the First International School on Excited States of Transition Elements, Książ Castle, Poland, June 20-25, 1988 written by Bogusława Jeżowska-Trzebiatowska and published by . This book was released on 1989 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Magnetism of Lanthanides Complexes and Networks by : Kevin Bernot
Download or read book Molecular Magnetism of Lanthanides Complexes and Networks written by Kevin Bernot and published by MDPI. This book was released on 2018-08-20 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Molecular Magnetism of Lanthanides Complexes" and Networks that was published in Magnetochemistry
