Download or read book Synthesis Characterization and Spectroscopic Studies of Lanthanide Complexes with Potential for Increased Sensitization and Luminescent Enhancement written by Kendra Evette Whitehead and published by . This book was released on 2011 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Develops techniques such as sensitization, to elude the Laporte forbidden inefficient f-f transitions.
Download or read book Synthesis and Characterization of New Luminescent Lanthanide Complexes written by Sooa Tara Cho and published by . This book was released on 2014 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Synthesis Characterization and Photophysical Studies of Organic Lanthanide Complexes written by Ka-Leung Wong and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Synthesis, Characterization, and Photophysical Studies of Organic-lanthanide Complexes" by Ka-Leung, Wong, 黃嘉良, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled SYNTHESIS, CHARACTERIZATION, AND PHOTOPHYSICAL STUDIES OF ORGANIC- LANTHANIDE COMPLEXES Submitted by Ka-Leung Wong For Degree of Doctor of Philosophy at The University of Hong Kong in August 2006 The general background and coordination chemistry of lanthanides, their characteristic luminescent properties and nonlinear luminescent properties with the applications to material science and biological systems are reviewed. The design and synthesis of lanthanide-organic complexes based on similar tripodal amide ligands N-[2-(bis{2-[(ortho- substituent -benzoyl)amino]ethyl}amino)- ethyl]benzamide (ortho substituent-C H N O ) and bidentate amide ligands di-2- 27 27 4 3 methoxy-(2-aminoethyl)benzamide (C H N O ) were described. These ligands were 20 33 3 8 found to have different coordination to the lanthanide that caused a change in the photo-physical properties. The occurrences of high order multi-photon processes are rare, especially with lanthanide complexes. Generally there is a lack of clear molecular structure in systems that have been reported in the literature, hindering our understanding of the correlation of photo-structural properties. Our complexes have been found to display two different forms of coordination, which significantly affects their photo-properties. X-Ray structure analysis showed that, one being a linear polymeric form and the other a dendritic form, the latter has been found to exhibit an additive harmonic generation process as well as the multi-photon process which is present in both types of coordination. The design and synthesis of a metal-organic network were described based on a lanthanide complex that contains mucic acid, {[Ln(Mucicate) (H O) ].5H O} (Ln 1.5 2 2 2 n = Eu and Tb), exhibiting a novel 1-D hydrophilic channel in the porous framework. The 3D framework with a hydrophilic inner surface was found to exhibit a reversible - - - - anion uptake. Upon addition of an aqueous solution of sodium salts of I, Br, Cl, CN, 2- CO, to a solid sample of the Ln complex, the luminescent intensity enhancements were observed. The anion response of the channels is believed to be due to the effect of numerous OH groups in the mucic acid, which interacts strongly with the anion through hydrogen bonding. Experimental details including instruments used for physical characterization and the photo-physical measurement for linear, multi-photon absorption induced f-f emission and nonlinear emission were presented. DOI: 10.5353/th_b3687535 Subjects: Rare earth metals Organometallic compounds - Synthesis
Download or read book Systematics and the Properties of the Lanthanides written by Shyama P. Sinha and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science is not a mere collection of facts. It is the correlation of facts, the interpretative synthesis of the available knowledge and its application that excite the imagination of a scientist. Even in these days of modern technology, the need for quick and accurate dissemination of new information and current concepts still exists. Conferences and Symposia offer one direct method of communication. The Summer Schools are another approach. The success of a Summer School is mainly due to that human factor and under standing that goes with it and allows for extensive and often time-unrestricted discussions. During the course of the past 20 years, one of the most in tensively studied groups of elements in the Periodic Table is the Lanthanides. In this period, we have increased our knowledge on these once exotic elements, which were once considered to be a part of a lean and hungry industry, many-fold due to the involve ment of scientists from various disciplines. The purpose of our Summer School was to bring a group of ex perts and participants together for the exchange of ideas and in formation in an informal setting and to promote interdisciplinary interactions. Out of many conceivable topics, we selected the following five as the main basis to broaden our knowledge and understanding I) Systematics 2) Structure 3) Electronic and Magnetic Proper ties 4) Spectroscopic Properties and 5) Lanthanide Geochemistry.
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.
Download or read book Synthesis Characterization and Photophysical Studies of Triazine based Lanthanide III diketonate Complexes written by Wai Sum Lo and published by . This book was released on 2016 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: As Sm(III) is dual-emissive - emitting in both the visible and NIR regions, the NIR photophysical properties were investigated. Originating from the same emitting state as the visible luminescence transitions, the NIR transitions were studied and compared. In addition to solvatochromic studies, this chapter discusses the validity of the energy gap law in estimating the extent of quenching by high energy oscillators and thus provide a blueprint for maximizing the intrinsically weak NIR luminescence by manipulating the coordination environment. NIR luminescence from the ytterbium(III) complex was also presented, as the energy transfer mechanism of Yb(III) has always been sort of an enigma due to the large energy difference between the Yb(III) only excited state and the donating state of common antennae. Chapter five focuses on the syntheses of a multidentate water-soluble pocket for lanthanide(III) complexes. The ligand system extends the aforementioned studies by using a single multi-chelate in place of multiple tri-/bi-dentate ligands as an effort to increase the stability of the complexes in solution state and thus creates a platform for exploring the non-triplet ILCT energy transfer pathway for lanthanide(III) luminescence sensitization in water to expand the scope of potential applications.
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.
Download or read book Energy transfer process luminescence optimizing and various applications of lanthanide complexes written by Wei Fan and published by OAE Publishing Inc.. This book was released on 2024-01-29 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modulating the spectroscopic overlap between the emission bands of donors and the absorption spectra of acceptors by various simulations, it is possible to systematically investigate the emission behaviors of lanthanide complexes under different conditions. To establish the relationships between emission behaviors and various external simulations, it is necessary to study the energy transfer rate and efficiency between the donor and acceptor under different conditions to clarify the luminescent mechanism of the complexes, providing a theoretical basis for high-performance smart materials. This review focuses on the recent progress of luminescence performance of lanthanide complexes, including energy transfer mechanisms, emission color modulation, the strategies for optimizing lanthanide luminescence, and finally, various applications based on luminescence performance of lanthanide complexes and lanthanide metal-organic frameworks.
Download or read book Luminescent Nanomaterials written by Odireleng Martin Ntwaeaborwa and published by CRC Press. This book was released on 2022-05-19 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades, luminescent nanomaterials have generated great interest in the scientific community due to their unique properties, which are different from those of their bulk counterparts, and their use in a wide variety of applications. Today, luminescent nanomaterials are used in a number of applications such as displays, solid-state lighting, solar cells, long afterglow, dosimetry, theft prevention, medical imaging, phototherapy, and quantum and gas sensing. This book presents cutting-edge research from experts in the field of synthesis and characterization of luminescent nanomaterials and their potential applications. It covers interesting topics in semiconductor physics, photochemistry, physical chemistry, materials science, and luminescence, and will be useful for beginners and advanced researchers interested in this field.
Download or read book Women in Lanthanide based Luminescence Research From Basic Research to Applications written by Qianqian Su and published by Frontiers Media SA. This book was released on 2021-05-18 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lanthanide Probes in Life Chemical and Earth Sciences written by J.-C. G. Bünzli and published by . This book was released on 1989 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lanthanide elements were first used some thirty years ago in the optical glass industry, followed shortly by their use as NMR shift reagents in organic chemistry. Since then, the application of lanthanides in studies of organic and biochemical systems by use of their NMR and spectroscopic properties has created a rapidly growing interest in the physics and chemistry of these elements. Their use in industrial catalysts, electronic and optical components, high-temperature superconductors, in medicine as X-ray intensifying materials, relaxation agents for imaging techniques or radioisotopes for pharmaceutical applications, have combined with their utilisation in science as probes of a wide variety of phenomena giving them a prominent place in modern science. In this book, leading experts describe the various facets of the application of lanthanides as probes in life, chemical and earth sciences. The aim is to provide guidance to scientists who may wish to use the unique advantages of lanthanide probes in their own fields.To supplement the chapters on the basic concepts of the application of lanthanides, chapters are provided on the basic chemistry of these elements and on the synthetic and analytical aspects of lanthanides and their compounds. The book thus provides a great deal of useful information which will no doubt assist scientists in using these fascinating and valuable elements in their research.
Download or read book Highly Luminescent Lanthanide Complexes with Specific Coordination Structures written by Kohei Miyata and published by . This book was released on 2014-04-30 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization and Photophysical Property Studies of a Series of Luminescent Organic and Organometallic Compounds written by Min Deng and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescent compounds with special photophysical properties, such as near-infrared (NIR) luminescence and circularly polarized luminescence (CPL), can be applied as bioimaging probes, security inks and chemical sensors. However, due to the inefficient quantum yield or brightness, applications of the developed NIR or CPL emitters in real life have rarely been discussed. In order to overcome these issues, this dissertation describes four chapters regarding the synthesis, characterization and photophysical property studies of a series of new organic and organometallic compounds. In chapter I, a novel mechanism for lanthanide sensitization will be discussed using a pyrene excimer generating ligand. In chapter II, lanthanide-based organometallic complexes with high circularly polarized luminescence brightness enabled by a chiral H8-Binol ligand will be mentioned. In chapter III, circularly polarized luminescence of the first molecular copper-based organometallic complexes incorporating a chiral carbene ligand will be shown. In chapter IV, the synthesis and photophysical property studies of a series of rhodamine derivatives will be included.
Download or read book Single Molecule Magnet and Luminescence Properties of Lanthanide and Transition Metal Complexes Using Tetrazine and Naphthalimide Based Ligands written by Kimia Jahandar Kojouri and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examined two distinct characteristics of lanthanide and transition metal complexes: Magnetism and Luminescence. In chapter two, synthesis, characterization, magnetic and luminescence investigations of mononuclear lanthanide complexes using Schiff-base tetrazine based ligand were performed. Six novel lanthanide complexes, [LaIIICl3(Htzpy)2], [TbIIICl2(Htzpy)2(MeOH)]Cl, [HoIIICl2(Htzpy)2(MeOH)]Cl, [DyIIICl2(Htzpy)2(MeOH)]Cl, [ErIIICl2(Htzpy)2(MeOH)]Cl and [YbIIICl2(Htzpy)2]Cl have been synthesized successfully and the studies were performed with the application of single crystal X-ray diffractometry, SQUID magnetometry, UV-Vis-NIR spectrometry and custom-built hyperspectral microscope (for luminescence spectroscopy). Chapter three is mainly about the luminescence properties of CoII and CuII complexes using a naphthalimide based ligand. Two complexes, [CoIICl2(Pynap)2] and [CuIIBr2(Pynap)2] were synthesized successfully and characterized using single crystal X-ray diffractometry, UV-Vis spectrometry and hyperspectral microscope (for luminescence spectroscopy). In order to have information about the electrochemical properties of CoII and CuII complexes, their redox activity was monitored by cyclic voltammetry (CV) and compared with the parent ligand. In addition, a rational design to synthesize a new ligand (dipicnap) which consists of both naphthalimide and dipicolinic acid moieties is presented.
Download or read book Part I written by Emma Nicholls-Allison and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reported in Chapter 2 of this thesis is the reliable and tolerant synthesis of a small library of pyrazole and triazole heterocycles. This synthesis was achieved in two steps in good yields from the reaction of acetophenone and benzamide derivatives with dimethyl formamide-dimethyl acetal followed by a cyclization with hydrazine. Also reported is the synthesis and characterization of their corresponding scorpionate ligands. Preliminary coordination chemistry was done with a variety of lanthanide metals and was studied by standard spectroscopic methods as well as variable temperature 1H NMR, which revealed that Curie-Weiss behaviour was followed for these complexes in solution. An X-ray crystal structure of a nine co-ordinate ytterbium metal centre with eight nitrogen atom (four pyrazole, four pyridine) donors and one chloride atom was obtained, which may have been a product of decomposition during crystal growth. The bond lengths of this structure were compared with other lanthanide complexes of similar structural motifs. This comparison supported the theory of decomposition as the pyridine nitrogen atom-ytterbium bond lengths were longer than the average ytterbium-nitrogen atom bond length.
Download or read book Spectroscopy of Lanthanide Doped Oxide Materials written by Sanjay J. Dhoble and published by Woodhead Publishing. This book was released on 2019-11-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopy of Lanthanide Doped Oxide Materials provides a comprehensive overview on the most essential characterization techniques of these materials, along with their key applications. The book describes the application of optical spectroscopy of lanthanides doped inorganic phosphor hosts and gives information about their structure and morphology, binding energies, energy of transition and band gap. Also discussed are the properties and applications of rare earth doped inorganic materials and the barriers and potential solutions to enable the commercial realization of phosphors in important applications. The book reviews key information for those entering the field of phosphor research, along with the fundamental knowledge of the properties of transition series elements under UV/Visible/NIR light exposer. Low-cost materials methods to synthesize the materials and spectroscopic characterization methods are also detailed.
