Download or read book The Ligand Dependent Luminescent Properties of a Lanthanide based Complex to Study and Optimize Its Use as a Biomedical Label written by Sarah Marie Ryder and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis of novel electron donating and water-soluble ligands for Eu3+ coordination in efforts to optimize the luminescent properties of a europium TTA complex. Biomedical labeling with luminescent lanthanide complexes can be used to image and measure structural characteristics of proteins and other biological molecules with high spectral purity. This works aims to study structural variations of a PIP ligand that optimize the efficacy of a europium complex for its use as a fluorescent biomedical label. Each PIP ligand was synthesized from 1,10-Phenanthroline-5,6-dione and an aldehyde substituent to be further reacted with Eu(TTA)3.2H2O to form the chelated europium complex. The structure of each PIP ligand was characterized using FT-IR, 1 H NMR, and 13C NMR spectroscopy.
Download or read book Highly Luminescent Lanthanide Complexes with Specific Coordination Structures written by Kohei Miyata and published by Springer Science & Business Media. This book was released on 2014-04-08 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis deals with strongly luminescent lanthanide complexes having novel coordination structures. Luminescent lanthanide complexes are promising candidates as active materials for EL devices, lasers, and bio-sensing applications. The organic ligands in lanthanide complexes control geometrical and vibrational frequency structures that are closely related to the luminescent properties. In most of the previous work, however, lanthanide complexes have high-vibrational frequency C–H units close to the metal center for radiationless transition. In this thesis, the luminescent properties of lanthanide complexes with low-vibrational frequency C–F and P=O units are elucidated in terms of geometrical, vibrational, and chemical structures. The author also describes lanthanide coordination polymers with both high thermal stability (decomposition point > 300°C) and strong-luminescent properties (emission quantum yield > 80%). The author believes that novel studies on the characteristic structures and photophysical properties of lanthanide complexes may open up a frontier field in photophysical, coordination and material chemistry.
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 Modern Applications of Lanthanide Luminescence written by Ana de Bettencourt-Dias and published by Springer Nature. This book was released on 2022-08-08 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume builds upon the successful book Lanthanide Luminescence published in the Springer Series on Fluorescence in 2011. Since its publication, the field of lanthanide spectroscopy and the areas in which the light emission properties of the f-elements are used have experienced substantial advances. The luminescence properties of lanthanide ions make them unique candidates for a myriad of optical applications. This book highlights and reviews the latest research in areas ranging from luminescence thermometry to imaging, sensing and photonic applications of these fascinating elements. Each chapter provides a comprehensive introduction to a specific area of application of lanthanide luminescence and extensively reviews seminal papers and current research literature. Given its interdisciplinary scope, the book appeals to scientists and advanced students in physics, chemistry and materials science interested in compounds and materials with optical properties.
Download or read book Assembled Lanthanide Complexes with Advanced Photophysical Properties written by Yuichi Hirai and published by Springer. This book was released on 2018-04-07 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis provides essential information on the systematic design of assembled lanthanide complexes for functional luminescent materials. It discusses the relationships between assembled structures and photo, thermal, and mechanical properties on the basis of crystallography, spectroscopy, and thermodynamics. The described guidelines for assembled structures will be extremely valuable, both for industrial applications and for readers’ fundamental understanding of solid-state photophysics and materials chemistry. Luminescent lanthanide complexes are promising candidates for lighting devices, lasers, and bio-probes owing to their line-like and long-lived emission arising from characteristic 4f–4f transitions. Low-vibrational and asymmetrical coordination structures around lanthanide ions have been introduced to achieve strong luminescence, using specific organic ligands. Recently, assembled lanthanide complexes including coordination polymers and metal organic frameworks have increasingly attracted attention as a new class of luminescent materials offering thermal stability and color tunability. However, improving the luminescence efficiencies of these compounds remains a challenge, and specific molecular designs to control assembled structures and yield additional physical properties have not been established. The author provides a group of bent-angled bridging ligands to boost photoluminescence efficiency, and successfully introduces for the first time glass formability and strong triboluminescence properties.
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 2014-09-08 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 Novel Lanthanide Based Luminescent Probes for Biological and Lighting Applications written by Alena Kalyakina and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Luminescent Properties of Europium Thenoyltriflouroacetone Ccomplexes with 2 phenyl 1H imidazo 4 5 f 1 10 phenanthroline Based Ligands written by Paul Jacob Venturo and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this work is to synthesize a series of europium complexes based on 2-phenyl-1Himidazo[4,5-f][1,10] phenanthroline ligand structure and optimize the luminescent quantum yield and fluorescence of lanthanide complexes and to gain an understanding of how the structure of the coordinating ligand influences the lanthanide luminescence. Lanthanide complexes have gone through some interesting developments in the past few years and the applications of these complexes continue to expand. The applications of their luminescent and spectroscopic properties can be found in fields such as chemistry, optics, engineering, and biomedical imaging. Many of these properties are caused by the unique electron configuration of the lanthanide ions. The purpose of this research is to observe and measure the fluorescent properties of europium complexes containing 2-phenyl-1H-imidazo [4,5-f [1,10]phenanthroline (PIP) based ligands. In this project, the PIP ligands are first synthesized then reacted with Eu(TTA)3 (H2O)2 to form europium PIP complexes. The ligands were characterized using FT-IR, 1H NMR, 13C NMR, UV-Vis, and Fluorescence spectroscopy. The luminescent quantum yields of the complexes were calculated using Eu(TTA)3 (H2O)2 as the standard. Density functional theory (DFT) calculations were carried out throughout the process to evaluate the structural and spectroscopic properties of both the ligands and their respected complexes. From the results, the only trend that was observed was between the ?EISC and the luminescent quantum yield where a ?EISC between 0.73-0.76 eV gave higher quantum yield values.
Download or read book From Antenna to Assay written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ligand-sensitized luminescent lanthanide(III) complexes are of considerable current interest due to their unique photophysical properties (micro- to millisecond lifetimes, characteristic and narrow emission bands, and large Stokes shifts), which make them well suited to serve as labels in fluorescence-based bioassays. The long-lived Ln(III) emission can be temporally resolved from scattered light and background fluorescence, resulting in vastly enhanced measurement sensitivity. One of the challenges in this field is the design of sensitizing ligands that provide highly emissive Ln(III) complexes that also possess sufficient stability and aqueous solubility required for practical applications. In this account we give an overview of some of the general properties of the trivalent lanthanides and follow with a summary of advances made in our laboratory in the development of highly luminescent Tb(III) and Eu(III) complexes for applications in biotechnology. A focus of our research has been the optimization of these compounds as potential commercial agents for use in Homogeneous Time Resolved Fluorescence (HTRF) technology, the requirements and current use of which will be briefly discussed. Our approach involves developing high-stability octadentate Tb(III) and Eu(III) complexes that rely on all-oxygen donor atoms as well as using multi-chromophore chelates to increase molar absorptivity compared to earlier examples that utilize a single pendant antenna chromophore. We have found that ligands based on 2-hydroxyisophthalamide (IAM) provide exceptionally emissive Tb(III) complexes with quantum yield values up to ca. 60%. Solution thermodynamic studies have indicated that these complexes are stable at the nanomolar concentrations required for commercial assays. Through synthetic modification of the IAM-chromophore, in conjunction with time-dependent density functional theory (TD-DFT) calculations, we have developed a method to predict absorption and emission properties of these chromophores as a tool to guide ligand design. Additionally we have investigated chiral IAM ligands that yield Tb(III) complexes possessing both high quantum yield values and strong circularly polarized luminescence (CPL) activity. To efficiently sensitize Eu(III) emission, we have utilized ligands based on the 1-hydroxypyridin-2-one (1,2-HOPO) chelate, which are remarkable since they combine both excellent photophysical properties in addition to exceptional aqueous stabilities. A more compete understanding of this chromophore has been achieved by combining low temperature phosphorescence measurements with the same TD-DFT approach used with the IAM system. Also, Eu(III) complexes with strong CPL activity have been obtained through preparation of chiral 1,2-HOPO ligands. Using the unique spectroscopic properties of Eu(III), we have also undertaken the kinetic analysis of radiative and non-radiative decay pathways for a series of complexes, which has highlighted the importance of the metal ion symmetry on the ensuing photophysical properties. Lastly, the commercial development of a Tb-IAM compound that offers improved performance in the common HTRF platform and has the potential to vastly improve the sensitivity of measurements carried out using this technique is presented.
Download or read book Luminescent Materials in Display and Biomedical Applications written by Vikas Dubey and published by CRC Press. This book was released on 2020-11-18 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Luminescent materials with advanced performance are in the research hot spot with the recent technical developments of the display, lighting, and fluorescence labeling. Rare-earth-doped luminescent materials have been the focus of the research community owing to their wide applications in display devices, temperature sensors, solar cells, biomedical fields, optoelectronics, etc. This book covers the broad aspects of organic and inorganic materials based phosphors. The purpose of this book is to provide an up-to-date account of the present status and advancement of various techniques of synthesis of luminescent materials and their advanced applications in different areas. This book will cover all the experimental and theoretical approaches related to the rare-earth-doped luminescent materials. It also contains all the necessary information about the rare-earth-doped luminescent materials that were used in the past few years. In a nutshell, this book provides a unique platform to the newcomers who are planning to do research on rare-earthdoped luminescent materials as well as the researchers who are well established in this field.
Download or read book Luminescence Thermometry written by Miroslav Dramićanin and published by Woodhead Publishing. This book was released on 2018-04-21 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Luminescence Thermometry: Methods, Materials, and Applications presents the state-of-the art applications of luminescence thermometry, giving a detailed explanation of luminescence spectroscopic schemes for the read-out of temperature, while also describing the diverse materials that are capable of sensing temperature via luminescence. Chapters cover the fundamentals of temperature, traditional thermometers and their figures of merit, a concise description of optical thermometry methods, luminescence and instrumentation, and an explanation of the ways in which increases in temperature quench luminescence. Additional sections focus on materials utilized for luminescence thermometry and the broad range of applications for luminescence thermometry, including temperature measurement at the nanoscale and the application of multifunctional luminescent materials. Provides an overview of luminescence thermometry applications, including high-temperature, biomedical, nanoscale and multifunctional Delves into luminescence thermometry by materials group, including Rare-earth and transition Metal Ion Doped, Semiconductors, Quantum Dots and Organic materials Gives a concise introduction of the latest methods of temperature measurement, including luminescence spectroscopic schemes and methods of analysis
Download or read book Luminescent Lanthanide containing Materials written by Julie Marie Wilkerson and published by . This book was released on 2012 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Luminescent lanthanide complexes have been widely studied for various biotechnology and materials science uses, however, the application of these luminescent systems in metallopolymers has been relatively limited, especially when compared to those incorporating transition metal complexes. The unique and interesting photophysical properties of lanthanide complexes (i.e., high color purity and long radiative lifetimes) make these systems ideal for the development of luminescent metallopolymers, which are a unique class of hybrid materials that synthetically incorporate metal centers into organic polymers, thereby taking advantage of the beneficial properties of both traditional inorganic (i.e., catalysis, optics, electronics) and organic (i.e., easy to process, flexible, low weight) materials. A new class of lanthanide complexes exhibiting metal-based visible and near-IR photoluminescence has been designed, synthesized and fully characterized by melting point, ESI-MS, elemental analysis and single crystal and powder X-ray diffraction (when possible). The photophysical properties of these luminescent monomer complexes were studied in solution and the solid state, with the emission spectra displaying the characteristic line-like emission peaks of the trivalent lanthanide ions. This indicates efficient energy transfer from ligand centered excited states to the emissive excited states of the lanthanides. The monomer complexes have been electropolymerized, resulting in conducting metallopolymers that display metal-based photoluminescence. Because these hybrid materials retain the desirable properties of both inorganic semiconductors and organic polymers, such as near metallic electrical conductivity, ease of processing, flexibility and light weight, they are promising for applications in solid-state lighting.
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 The Study of Photophysical Properties of Organic lanthanide Hybrid Materials and Their Applications written by Guochen Bao and published by . This book was released on 2020 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designing hybrid materials allows leveraging the properties of different material systems to achieve novel functions. Significant progress has been made in recent years to exploit the physicochemical properties of a new generation of hybrid materials for emerging biomedical applications. In Chapter 1, I review the recent advances in the field of dye-lanthanide hybrid materials, centring on the interface between organic dyes and inorganic lanthanide materials and investigating their photophysical and photochemical properties. Five representative dye-lanthanide hybrid material systems including lanthanide complex, dye-sensitised downshifting nanoparticles (DSNPs), dye-sensitised downconversion nanoparticles (DCNPs), dye-sensitised upconversion nanoparticles (UCNPs), and UCNPs-dye energy transfer systems have been thoroughly discussed. We highlight the key applications of dye-lanthanide hybrid materials in bioimaging, sensing, drug delivery, therapy, and cellular activity studies. In Chapter 2, I design and synthesize an ytterbium complex-based sensor for the detection of Hg2+ ions. The water-soluble ytterbium complex exhibits reversible off−on visible and NIR emission upon the binding with mercury ion. The fast response and 150 nM sensitivity of Hg2+ detection are based upon FRET and the lanthanide antenna effect. The reversible Hg2+ detection can be performed in vitro, and the binding mechanism is studied by NMR employing the motif structure in a La complex and by DFT calculations. In Chapter 3, I report a pair of stoichiometric terbium-europium dyads as molecular thermometers and study their energy transfer properties. A strategy for synthesizing hetero-dinuclear complexes that contain chemically similar lanthanides is developed. By this strategy, a pair of thermosensitive dinuclear complexes, cycTb-phEu and cycEu-phTb, was synthesized. Their structures were geometrically optimized with an internuclear distance of approximately 10.6 Å. The dinuclear complexes have sensitive temperature-dependent luminescent intensity ratios of europium and terbium emission, and temporal dimension responses over a wide temperature range (50 - 298 K and 10 - 200 K, respectively). This indicates that both dinuclear complexes are excellent self-referencing thermometers. In Chapter 4, I investigate spectral structure and intensity changes of a pair of dinuclear complexes with a europium ion on cyclen site and a lanthanum ion on phen site or vice verses (cycEu-phLa and cycLa-phEu). Though they have the same components and the same energy levels, they present different photophysical properties due to the different coordination environment. The band positions are different in the emission spectra. The emission of cycEu-phLa showed a stronger relative intensity of 5D0 → 7F2 transition whereas the relative intensity of 5D0 → 7F4 transition was weaker in comparison with cycLa-phEu. We found the cycEu-phLa have higher internal quantum efficiency while the cycEu-phLa have higher sensitizing efficiency, though they have similar external quantum yield. We determined the singlet-triplet intersystem crossing rate with values as ~108 s-1. In Chapter 5, I exploit a dye sensitised upconversion nanoparticle with highly enhanced upconversion emission. I designed and synthesized a new dye by connecting tetraphenylethene (TPE) with the cyanide NIR dye, IR783. The resultant compound (TPEO-IR783) has a quantum yield of 22.46% which is 3 times higher than that of reported UCNP sensitiser (IR806). The TPEO-IR783 exhibits a transparent window in a range of 400 nm to 600 nm, making it suitable sensitiser for upconversion nanoparticles by avoiding reabsorption. The TPEO-IR783 sensitised UCNPs show more than 200-fold upconversion emission than the reported IR806 sensitised UCNPs under the same condition. In Chapter 6, I develop an ytterbium nanoparticle-mediated upconversion system. The system enables the singlet energy transfer from sensitisers to acceptor triplet states without the requirement of intersystem crossing. I evaluate the hybrid upconversion design by IR808 and rubrene acid. While the mixture of IR808 and rubrene acid does not show any upconversion emission, the introduction of an intermediate ytterbium energy level by adding NaGdF4:Yb nanoparticles displays strongly enhanced upconversion emissions. This design bypasses the specific requirement of traditional sensitisers in TTA system, providing a wide range of opportunities in deep tissue applications. Chapter 7 is the experiment sections where details of materials, characterizations, and synthetic procedures in each chapter have been provided.
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 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.
