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.
Luminescent 1-hydroxy-2-pyridinone Chelates of Lanthanides
Luminescent 1-hydroxy-2-pyridinone Chelates of Lanthanides - 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 Luminescent 1-hydroxy-2-pyridinone Chelates of Lanthanides write by . This book was released on 2017. Luminescent 1-hydroxy-2-pyridinone Chelates of Lanthanides available in PDF, EPUB and Kindle. The present invention provides luminescent complexes between a lanthanide ion and an organic ligand which contains 1,2-hydroxypyridinone units. The complexes of the invention are stable in aqueous solutions and are useful as molecular probes, for example in medical diagnostics and bioanalytical assay systems. The invention also provides methods of using the complexes of the invention.
Highly Luminescent Lanthanide Complexes with Specific Coordination Structures
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.
Eu(III) Complexes of Octadentate 1-Hydroxy-2-pyridinones
Eu(III) Complexes of Octadentate 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 Eu(III) Complexes of Octadentate 1-Hydroxy-2-pyridinones write by . This book was released on 2009. Eu(III) Complexes of Octadentate 1-Hydroxy-2-pyridinones available in PDF, EPUB and Kindle. The luminescence properties of lanthanoid ions can be dramatically enhanced by coupling them to antenna ligands that absorb light in the UV-visible and then efficiently transfer the energy to the lanthanoid centre. The synthesis and the complexation of Ln{sup III} cations (Ln = Eu, Gd) for a ligand based on four 1-hydroxy-2-pyridinone (1,2-HOPO) chelators appended to a ligand backbone derived by linking two L-lysine units (3LI-bis-LYS) is described. This octadentate Eu{sup III} complex ([Eu(3LI-bis-LYS-1,2-HOPO)]−) has been evaluated in terms of its thermodynamic stability, UV-visible absorption and luminescence properties. For this complex, the conditional stability constant (pM) is 19.9, which is an order of magnitude higher than diethylenetriaminepentacetic acid at pH = 7.4. This Eu{sup III} complex also shows an almost two-fold increase in its luminescence quantum yield in aqueous solution (pH = 7.4) when compared with other octadentate ligands. Hence, despite a slight decrease of the molar absorption coefficient, a much higher brightness is obtained for [Eu(3LI-bis-LYS-1,2-HOPO)]−. This overall improvement was achieved by saturating the coordination sphere of the Eu{sup III} cation, yielding an increased metal-centred efficiency by excluding solvent water molecules from the metal's inner sphere.
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.
