Highly Luminescent Lanthanide Complexes with Specific Coordination Structures - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Highly Luminescent Lanthanide Complexes with Specific Coordination Structures write by Kohei Miyata. This book was released on 2014-04-08. Highly Luminescent Lanthanide Complexes with Specific Coordination Structures available in PDF, EPUB and Kindle. 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.
Assembled Lanthanide Complexes with Advanced Photophysical Properties
Assembled Lanthanide Complexes with Advanced Photophysical Properties - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Assembled Lanthanide Complexes with Advanced Photophysical Properties write by Yuichi Hirai. This book was released on 2018-04-07. Assembled Lanthanide Complexes with Advanced Photophysical Properties available in PDF, EPUB and Kindle. 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.
Highly Luminescent Lanthanide Complexes of 1 Hydroxy-2-pyridinones
Highly Luminescent Lanthanide Complexes of 1 Hydroxy-2-pyridinones - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Highly Luminescent Lanthanide Complexes of 1 Hydroxy-2-pyridinones write by . This book was released on 2007. Highly Luminescent Lanthanide Complexes of 1 Hydroxy-2-pyridinones available in PDF, EPUB and Kindle. The synthesis, X-ray structure, stability, and photophysical properties of several trivalent lanthanide complexes formed from two differing bis-bidentate ligands incorporating either alkyl or alkyl ether linkages and featuring the 1-hydroxy-2-pyridinone (1,2-HOPO) chelate group in complex with Eu(III), Sm(III) and Gd(III) are reported. The Eu(III) complexes are among some of the best examples, pairing highly efficient emission ([Phi]{sub tot}{sup Eu} ≈ 21.5%) with high stability (pEu ≈ 18.6) in aqueous solution, and are excellent candidates for use in biological assays. A comparison of the observed behavior of the complexes with differing backbone linkages shows remarkable similarities, both in stability and photophysical properties. Low temperature photophysical measurements for a Gd(III) complex were also used to gain insight into the electronic structure, and were found to agree with corresponding TD-DFT calculations for a model complex. A comparison of the high resolution Eu(III) emission spectra in solution and from single crystals also revealed a more symmetric coordination geometry about the metal ion in solution due to dynamic rotation of the observed solid state structure.
Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials
Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials write by Ana de Bettencourt-Dias. This book was released on 2014-11-17. Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials available in PDF, EPUB and Kindle. 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.
Energy Transfer Processes in Polynuclear Lanthanide Complexes
Energy Transfer Processes in Polynuclear Lanthanide Complexes - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Energy Transfer Processes in Polynuclear Lanthanide Complexes write by Shun Omagari. This book was released on 2019-01-17. Energy Transfer Processes in Polynuclear Lanthanide Complexes available in PDF, EPUB and Kindle. 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.
