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Dissertations / Theses on the topic 'IR Luminescence'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Aseev, V. A., E. V. Kolobkova, Ya A. Nekrasova, N. V. Nikonorov, R. K. Nuryev, and A. S. Rokhmin. "Up-conversion and IR Luminescence of Ytterbium–Erbium Oxyfluoride Silicate Glassceramics." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35517.

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The paper studied the luminescent properties of lead fluoride silicate nanostructured glassceramics doped with ytterbium and erbium ions. We have measured luminescence spectra of glassceramics in the visible and near-IR ranges at temperatures of 300 and 77 K and under their pumping at a wavelength of 975 nm. We have examined changes in the luminescence spectra of glassceramics depending on the time of their secondary thermal treatment, concentration of dopant ions, specimen temperature, and power of exci-tation radiation. When you are citing the document, use the following link http://essuir.s

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2

Skaudžius, Ramūnas. "Pakeistų itrio aliuminio ir itrio galio granatų sintezė ir tyrimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20141209_112403-17530.

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Nuo 1926-ųjų metų, kai pirmą kartą buvo ištirta preliminari natūralių silikatinių mineralų, turinčių kubinę kristalinę gardelę, struktūra, granatų šeimai priskiriami junginiai tapo viena labiausiai tyrinėjamų medžiagų grupių. Granatai, kuriuose yra pereinamųjų metalų bei retųjų žemių metalų, pasižymi ypatingu technologiniu pritaikymu. Kaip šviečiančios medžiagos jie naudojami kietafaziuose lazeriuose, televizorių ekranuose ar dioduose. Europiu arba chromu legiruoti junginiai galėtų būti pritaikyti optiniam vaizdavimui medicinoje, kas iki šiol nebuvo daryta. Galimybė pagerinti granatų optines i

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3

Cankut, Ahmet N. "Synthesis and luminescence studies of Ir(III) complexes and iridium/lanthanide dyads." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/10445/.

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This thesis is concerned with the preparation and photophysical studies of various Ir(III) complexes and Ir(III)/Ln(III) dyads. Chapter 1 provides an introduction to the background of d-metal and f-metal luminescence and their use in biological applications. The emphasis is on the use of Ir(III) chromophores based on phenylpyridine ligands to stimulate emission from Ln(III) ions via an energy-transfer mechanism (the ‘antenna effect’). Examples of these Ir(III)/Ln(III) dyads from literature are given. Chapter 2 describes the preparation of the complexes [Ir(fppy)2Lpytz] and [Ir(fppy)2Lpic] and

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4

Katelnikovas, Artūras. "Liuminescencinių medžiagų sintezė, charakterizavimas ir taikymas kietakūniams šviesos šaltiniams." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_090425-73499.

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Žmonija jau nuo senų senovės stengiasi prailginti dieną dirbtiniais šviesos šaltiniais. Šviesos šaltiniai vystėsi pamažu – iš pradžių buvo deginama mediena, žibalas ir žvakės, vėliau buvo išrasta kaitrinė lemputė, o dar po kurio laiko fluorescencinė lempa. Jauniausi iš dirbtinių šviesos šaltinių yra šviestukai, kurie yra pranašesni už prieš tai minėtus šaltinius savo dideliu efektyvumu. Pakeitus dabartinius šviesos šaltinius šviestukais, būtų galima sutaupyti milžinišką elektros energijos kiekį, suvartojamą apšvietimui. Pagrindinis disertacijos tikslas buvo buvo naujų liuminescencinių medžiagų

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Fournier, Jessica. "Etude spectroscopique de micro fractures sous surfaciques dans la silice vitreuse dans la gamme proche IR-proche UV." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00649867.

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Cette thèse entre dans le contexte des études portant sur l'endommagement laser des optiques en silice utilisées sur le Laser MégaJoule (LMJ) au CEA/CESTA. L'étude par spectroscopie de luminescence des défauts présents dans les micro-fractures sous surfaciques des pièces de silice polie, supposés être à l'origine de l'amorçage de l'endommagement laser, a été choisie pour cette recherche. Les micros fractures étant difficiles à détecter, nous avons créé des fractures modèles en faisant des indentations dans la silice. Une comparaison des spectres de luminescence sous excitation à 325 nm, proche

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6

Pichon, Thibault. "Modélisation et caractérisation expérimentale du phénomène de luminescence induit par l’irradiation de protons dans les détecteurs IR HgCdTe en environnement spatial." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP090.

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Ce manuscrit présente le travail de thèse effectué dans le cadre de la préparation à la spatialisation desdétecteurs infrarouges ALFA (Astronomical Large Format Array) : des détecteurs matriciels 2048 × 2048 pixels au pas de 15 μm composés d’un matériau absorbant en HgCdTe crû sur un substrat de CdZnTe. L’étude se porte en particulier sur le produit de l’interaction des protons avec le substrat de CdZnTe à l’origine de la pollution des images sous irradiation. Le retrait complet du substrat résout radicalement le problème mais c’est une étape délicate dans la fabrication des détecteurs. L’obje

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7

Xu, Chaojie. "Molecular tectonics : heterometallic coordination networks based on chiral luminescent Ir(III) complexes." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF049/document.

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Les réseaux de coordination sont des architectures cristallines hybrides organiques-inorganiques pouvant présenter des propriétés découlant de leurs compositions et de leurs architectures. L’objectif de ce travail fut la synthèse de réseaux de coordination hétérométalliques à base de complexes d’Iridium (III) chiraux et luminescents.Dans un premier temps, la synthèse de nouveaux complexes d’Iridium cationiques bis-cyclométallés sous forme racémique et énantiopure a été réalisée avec succès. L'étude de leurs propriétés photophysiques a montré une émission dans le rouge par excitation dans le vi

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8

Ma, Lidong. "Investigation of multicolored and white light emission from IR-excited nano-particles:." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109229.

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Thesis advisor: Baldassare Di Bartolo<br>Thesis advisor: Pradip Bakshi<br>The search for multicolored light produced by some IR laser-excited luminescent nano-powders has revealed, for laser power exceeding a threshold value, the emission of white light (WL) with black-body characteristics. I am directing my research to the study of the physical parameters that may influence the threshold power of the laser and the efficiency of the WL emission. A typical compound that I will investigate will consist of nano-powders of SrZrO3 doped with Yb. The parameters of relevance may include Yb concentrat

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Aleotti, Flavia. "A 2-pyridyl-2,1-borazaronaphthalene derivative as forefather of a new class of bidentate ligands: synthesis and application in luminescent Ir(III) complexes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13877/.

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Borazaro compounds (or azaborines) are aromatic compounds in which a C=C unit is replaced by an isoelectronic B-N unit. The possibility to generate chemical diversity has led to an increasing interest in azaborines, especially in the fields of biomedical research and optoelectonics. In particular, Dewar’s synthesis of borazaronaphthalene is a common starting step to obtain different 1,2-azaborines via nucleophilic substitution on the boron atom. Here we present the synthesis of a novel 1,2-azaborine (i.e. 4-methyl-2-(pyridin-2-yl)-2,1-borazaronaphthalene, named FAAH) via functionalization of 2

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Fedorov, Nikita. "Luminescence résolue en temps de solides cristallins et de nano particules excités par des impulsions IR, UV et VUV femtosecondes d'intensité variable." Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13629/document.

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Mon travail pendant cette thèse a d’abord été le développement d’une source de génération d’harmoniques d’ordre élevé basée sur une chaîne laser femtoseconde amplifiée (Saphir-Titane) fonctionnant à une cadence de 1 kHz (AURORE). Une ligne de lumière construite au CELIA permet de fournir un faisceau focalisé VUV-XUV femtoseconde, monochromatique dans une région spectrale comprise entre 10 nm et 73 nm environ (17 eV à 120 eV). Cette installation expérimentale est en fonctionnement et est parmi les toutes premières lignes à être mise en service pour la communauté scientifique française et étrang

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11

Mancini, Riccardo. "Inverse and regular phenyl-azole ligands for luminescent Iridium(III) complexes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9318/.

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In the modern society, light is mostly powered by electricity which lead to a significant increase of the global energy consumption. In order to reduce it, different kinds of electric lamps have been developed over the years; it is now accepted that phosphorescence-based OLEDs offer many advantages over existing light technologies. Iridium complexes are considered excellent candidates for bright materials by virtue of the possibility to easily tune the wavelength of the emitted radiation, by appropriate modifications of the nature of the ligands. It is important to note that the synthesis of I

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Veselska, Oleksandra. "Études Structurales et Photophysiques de Polymères de Coordination de Thiolates de Métaux Monétaires." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1197/document.

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Les polymères de coordination (PCs) à base de thiolates de métaux monétaires sont bien connus pour leurs propriétés luminescentes. Cependant, leurs structures sont sous-explorées. Dans cette thèse, nous présentons une étude pionnière visant la compréhension de la formation de la structure et de la corrélation ‘structure-propriétés’ des PCs homoleptiques neutres, [M(SR)]n, M = Cu(I), Ag(I), Au(I). Les composés avec les dérivés du thiophénolate étudiés dans ce travail, illustrent comment l'utilisation de certains ligands organiques fonctionnalisés conduit à la formation de réseaux 2D étendus ou

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Tungulin, Dmitry. "Towards NIR emission: 2-(1H-tetrazol-1-yl)pyridine as versatile ligand for the synthesis of two new families of cationic and neutral Ir(III) complexes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11948/.

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In the last decades, cyclometalated Ir(III) complexes have drawn a large interest for their unique properties: they are excellent triplet state emitters, thus the emission is phosphorescent in nature; typically high quantum yields and good stability make them good candidates for luminescent materials. Moreover, through an opportune choice of the ligands, it is possible to tune the emission along the whole visible spectra. Thanks to these interesting features, Ir(III) complexes have found different applications in several areas of applied science, from OLEDs to bioimaging. In particular, regard

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14

Chahal, Radwan. "Capteurs optiques en fibres de verre de chalcogénure dopées terres rares appliqués à la surveillance du stockage géologique de CO2." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S066/document.

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L'augmentation des émissions de CO2 entraîne un réchauffement de la planète préjudiciable aux équilibres écologiques terrestres. Dans ce contexte, le stockage de CO2 dans des formations géologiques terrestres et sous-marines se pose comme un moyen intéressant de limiter les conséquences de ces émissions. Cependant cette solution nécessite une surveillance continue afin de détecter d'éventuelles fuites au niveau d'une zone de stockage. Les travaux de thèse présentés concernent le développement d'un capteur optique en fibre de chalcogénures pour la détection de CO2 gazeux fonctionnant dans le mo

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15

Rerbal, Kamila. "Etats électroniques localisés dans a-Sil-xCx:H massif et poreux : Spectroscopie IR et photoluminescence." Palaiseau, Ecole polytechnique, 2004. http://www.theses.fr/2004EPXX0044.

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16

Hory, Marie Anne. "Contribution à l'étude de la luminescence du silicium poreux : analyse infrarouge de la passivation de surface et effets de la polarisation électrique." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10150.

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Les etudes presentees dans ce manuscrit portent sur la photo- (pl) et l'electro-luminescence (el) de couches de silicium poreux obtenu par attaque electrochimique de substrat de silicium monocristallin. La premiere partie presente les principales caracteristiques du materiau et la description de ses proprietes de luminescence accompagnee des differents modeles avances pour en expliquer les mecanismes, en s'attachant tout particulierement a celui du confinement quantique des porteurs dans les cristallites qui forment la couche poreuse, qui est le plus generalement retenu. La deuxieme partie dec

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17

Raoudi, Sara. "Sintesi di complessi luminescenti anionici di Ir(III)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10035/.

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Negli ultimi anni si è osservato un crescente sviluppo della ricerca nel campo dei materiali luminescenti per le loro diverse applicazioni reali e potenziali, fra cui l’impiego in dispositivi elettroluminescenti, quali OLEDs (Organic Light-Emitting Diodes) e LECs (Light-Emitting Electrochemical Cells). In modo particolare, si rivolge grande attenzione ai complessi ciclometallati di Ir(III) grazie alle peculiari caratteristiche che li contraddistinguono fra i materiali luminescenti, come l'emissione fosforescente, alte rese quantiche di emissione, lunghi tempi di vita e buona stabilità nei di

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Singh, Shalini. "Luminescent cyclometallated Ir(III) complexes : synthesis, characterisation and applications." Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/9067.

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A range of luminescent Ir(III) complexes [Ir(C^N)2(X^Y)]n+ (n = 0, 1) containing different cyclometallated (C^N) and ancillary (X^Y) ligands has been synthesised. All new compounds were fully characterised by 1H and 13C NMR spectroscopy, mass spectrometry and elemental analyses and several compounds have been structurally characterised by X-ray crystallography. The photophysical and electrochemical properties of the complexes were also studied. Chapter one provides an introduction to luminescent transition metal complexes, in particular Ru(II) and Ir(III) complexes and gives an overview of the

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Lu, Lihua. "Design and syntheses of Ir(III) complexes as luminescent biosensors." HKBU Institutional Repository, 2015. https://repository.hkbu.edu.hk/etd_oa/276.

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Luminescent transition metal complexes have attracted tremendous interest in the analytical field. Most luminescent metal complexes possess long emission lifetimes in the visible region, and their phosphorescence can be readily distinguished from short-lived background auto-fluorescence. Moreover, their large Stokes shift can prevent self-quenching, while their modular synthesis allows their properties to be readily tuned without labor-intensive synthetic protocols. These properties render transition metal complexes as promising candidates for the development of biosensors. In this study, I ai

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Petit, Laëticia. "Amplification optique dans des verres borophosphate de niobium et tellurite dopés aux ions de terres rares présentant un indice optique non linéaire élevé." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2002. http://tel.archives-ouvertes.fr/tel-00003919.

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Ce travail s'insère, non seulement, dans la compréhension de la relation entre la résonance des terres rares et l'indice non linéaire, mais aussi, dans la recherche de nouveaux matériaux dopés terres rares pour la commutation optique. L'introduction d'oxyde d'erbium dans des verres tellurites et borophosphates de niobium, présentant intrinsèquement une non linéarité optique de 3ème ordre élevée, a été étudiée. Il a été montré qu'il est possible de contrôler le gain et la non linéarité de matériaux dopés grâce à la corrélation établie entre l'analyse structurale et l'étude des propriétés spectr

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Rocchi, Federico. "Triazolilideni funzionalizzati come versatili carbeni mesoionici in complessi luminescenti." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14438/.

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1,2,3-Triazolylidenes belong to the class of abnormal N-heterocyclic carbenes, which are singlet carbenes with the carbonic center directly bound to at least one nitrogen atom of the heterocycle, and no uncharged resonance structure can be drawn. Since their precursors synthesis is quite simple and it allows the variation of the substituents on the triazolic ring, the use of 1,2,3-triazolylidenes as bidentate ligands for appropriate metallic complexes is very interesting. In the present work I report the synthesis of 1,2,3-triazolium salts 1-benzyl-3-methyl-4-(pyridin-2-yl)-1H-1,2,3-triazol-3-

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Alazawi, Sarab Mahdi Salih. "Luminescent applications of Re(I) and Ir(IІІ) complexes for cellular imaging". Thesis, University of Leicester, 2018. http://hdl.handle.net/2381/42845.

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Luminescent transition metal complexes are receiving great attention for use as bioimaging agents, in organic light-emitting devices (OLEDs), solar cells and sensors. They possess biological stability, low toxicity, large Stokes shifts, and long luminescence lifetimes. A new series of rhenium(І) and iridium(III), complexes incorporating polyamines were synthesized to use as dyes for cellular imaging in particular to replacement organic dyes such as FM1-43. Different probes were used in this study: click chemistry was used to prepare ancillary (N^N) ligands such as pyridyl triazoles and cyclome

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Di, Girolamo Alessandro. "4-Fenil-1,2,3-triazoli come versatili leganti ciclometallanti in complessi luminescenti di Ir(III)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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I complessi luminescenti di metalli di transizione costituiscono una classe di materiali che ha suscitato un notevole interesse soprattutto per le loro proprietà elettrochimiche e fotofisiche. Tra i vari complessi di metalli di transizione, i complessi di Ir(III) giocano un ruolo fondamentale in differenti applicazioni grazie alla loro versatilità sintetica, stabilità chimica e termica, elevata efficienza di emissione e modulabilità del colore emesso. Lo scopo del lavoro di Tesi è stato quello di sintetizzare complessi eterolettici luminescenti di Ir(III), basati su derivati 1,2,3-triazolilide

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Langdon-Jones, Emily. "Re(I), Ir(III) and Au(I) luminescent complexes for imaging, sensing and therapy." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/86882/.

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This thesis further developed several fluorescent ligand systems and their coordination to transition metals. Their synthesis and coordination chemistry to Re(I), Ir(III)or Au(I) is described, with detailed discussions on the photophysical properties and their potential towards imaging, sensing and therapeutic applications. In Chapters 2–3, N–substituted–1,8–naphthalimide fluorophores were synthesised and their coordination to Re(I) was investigated. Chapter 2 describes a series of fac– [Re(CO)3(N^N)(LX)]BF4 complexes, axially substituted with naphthalimide fluorophores. Chapter 3 builds on wo

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FONTANI, MATTIA. "NOVEL PT(II) AND IR(III) COMPLEXES WITH NON-LINEAR OPTICAL AND LUMINESCENT PROPERTIES." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/606079.

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My PhD project has been focused on the synthesis of novel Pt(II) and Ir(III) complexes with nonlinear optical (NLO) and luminescent properties. Metal complexes with nonlinear optical properties: It is known that molecules formed by donor (D) and acceptor (A) groups linked with an unsaturated bridge having polarizable π-electrons are particularly NLO-efficient. Compared to organic compounds, metal complexes can offer further flexibility due to the presence of NLO-active charge transfer transitions between the metal and the ligands, usually at relatively low energy and of high intensity, tu

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Chepelin, Oleg. "Metallosupramolecular assemblies : development of novel cyclometalated Pt(II) and Ir(III)-based capsules." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/8907.

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Inspired by nature’s use of self-assembled systems to carry out virtually all biological processes, chemists have taken to building simplified synthetic systems that mimic the biotic world. Although transition metal-ligand interactions are rarely used for the purpose of biological self-assembly, they have several advantages over other weak noncovalent interactions, such as pronounced directionality and significant strength. These particular attributes have allowed chemists to construct a comprehensive library of self-assembled polygons and polyhedra, using different transition metal-ligand mot

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VILLA, IRENE. "Structural and morphological tuning of inorganic luminescent nanophosphors - towards applications in sensing and lighting." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2015. http://hdl.handle.net/10281/87314.

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I materiali luminescenti nanostrutturati sono largamente studiati per applicazioni in lampade e display, come scintillatori e nell’imaging biomedico. Pertanto, la ricerca nei nanomateriali prevede lo sviluppo di metodi di sintesi all’avanguardia per il controllo della loro struttura, morfologia e drogaggio. L’utilizzo di polveri nanocristalline per la fabbricazione di nanocompositi permette di ridurre l’incorrere di diverse problematiche come la diffusione della luce emessa; inoltre la dimensione nanometrica dei materiali è un requisito fondamentale per le applicazioni in biotecnologia, per la

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Mauro, M. "Luminescent Re(I) and Ir(III) complexes: from design to application in light-emitting devices." Doctoral thesis, Università degli Studi di Milano, 2009. http://hdl.handle.net/2434/166364.

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In the past two decades, luminescent materials have attracted enormous interest due to their great photophysical and electrochemical properties. Such compounds have shown potential in biological imaging and, most important, as photoactive components for electroluminescent materials (i.e. OLEDs and LEECs), as well as sensitizers in solar cells[3]. In some case they became a real market technology to date. The most powerful driving forces for the research in such field are the pursuit of renewable non-oil based energy sources (solar cells application) and of more efficient lightening devices (OL

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D'Ignazio, Andrea. "Progettazione e sintesi di coppie ioniche ("soft salts") basate su complessi Ir(III) tetrazolici." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10031/.

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In questo lavoro di tesi sperimentale si è sintetizzata e caratterizzata la prima classe di complessi tetrazolici di Ir(III) anionici con formula generale [Ir(C^N)2(L)2]-, in cui oltre ai leganti ciclometallanti ”C^N” quali 2-fenilpiridinato (ppy) o 2-(2,4-difluorofenil)piridinato (F2ppy), sono stati introdotti due anioni tetrazolato (L) come il 5-fenil tetrazolato (Tph) oppure 5-(4-cianofenil) tetrazolato (TphCN). I complessi di Ir(III) anionici ottenuti si sono mostrati intensamente fosforescenti, con emissioni centrate nella regione del blu o del verde (460 < λmax<520 nm). I derivati anioni

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Caporale, Chiara. "Nuovi complessi alchinil tetrazolici di iridio(III) e renio(I): Sintesi, reattività e proprietà fotofisiche." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6541/.

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In this experimental thesis, two luminescent Ir(III) and Re(I) complexes which have a terminal alkynyl group on the tetrazole ligand were prepared. The aim was to use them as building blocks, in order to synthesize more complex structures. We explored two simple reactions: the first one was a coupling, for the formation of Ir(III)/Au(III) and Re(I)/Au(III) hetero binuclear complexes, and the second was a 1,3-dipolar Cu(I)-catalyzed “Click” cycloaddition, between the terminal alkyne and azide. The synthesized products were characterized through photophysical analysis, evaluating how the photoe

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Migliarini, Francesco. "Fine tuning delle proprietà fotoemissive di complessi Ir(III)-tetrazolici." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16760/.

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In questo lavoro di tesi sperimentale viene presentata una nuova classe di complessi ciclometallati di Ir(III) con formulazione generale [Ir(C^N)2(N^N)] dove (C^N) rappresenta i due diversi leganti ciclometallanti impiegati, ovvero 2-fenillisonicotinonitrile (4CN-ppy) e 2-(2,4-difluorofenil)isonicotinonitrile (4CN-F-ppy), mentre (N^N) rappresenta il derivato 5-aril tetrazolico 2-(1H-tetrazol-5-il)piridina (PyTz-H) o 2-(1H-tetrazol-5-il)pirazina (PyzTz-H). La progettazione dei complessi è stata rivolta alla modulazione del loro colore di emissione agendo, in particolare, sull’energia relativa d

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Mahiou, Rachid. "Transferts d'excitation optique et effets non lineaires dans des materiaux concentres en gadolinium." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF2E379.

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Fluorescence de nagdf::(4), k::(2)gdf::(5), gdcl::(3). Excitation selective dans l'ultraviolet (excitation a 1 photon) ou dans le rouge (excitation a 2 photons) d'une des composantes stark du multiplet **(6)p::(7/2) de gd**(3+). Le declin de la fluorescence entre 4,4k et la temperature ambiante permet de determiner le mode de diffusion de l'energie d'excitation. Effet de la densite d'excitation. Mise en evidence d'une fluorescence anti-stokes issue des niveaux **(6)g::(7/2), **(6)d::(3/2) et **(6)i::(7/2). Effet d'un champ magnetique

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Groves, Lara. "Luminescent and electrochemical probes based on Au(I), Ir(III) and Fe(II) coordination complexes for bioimaging, diagnostics and therapeutics." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/108908/.

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This thesis describes the development and synthesis of a range of novel fluorophores based on 1,8-naphthalimide, N-heterocyclic carbene (NHC) and phosphine derivatives, as well as coordination chemistry with Au(I), Ir(III) and Fe(II). Detailed discussions on the characterisation and the photophysical properties are described, with reference to applications including bioimaging, diagnostics and therapeutics. Chapter 2 describes the synthetic development and spectroscopic analysis of a series of NHC-functionalised 1,8-naphthalimide fluorophores, generating ten new ligands that were successfully

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Bischof, Caroline [Verfasser], Michael [Gutachter] Seitz, and Martin [Gutachter] Feigel. "Building blocks for multinuclear near-IR luminescent lanthanide complexes / Caroline Bischof ; Gutachter: Michael Seitz, Martin Feigel ; Fakultät für Chemie und Biochemie." Bochum : Ruhr-Universität Bochum, 2013. http://d-nb.info/1201553318/34.

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Mutti, Alessandra Mara Garbosa [UNESP]. "Estudo de nanocompósitos luminescentes baseados em complexos de Eu(III) e Ir(III) ancorados à nanopartículas de sílica por bases de Schiff." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/127580.

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Made available in DSpace on 2015-09-17T15:24:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-03-27. Added 1 bitstream(s) on 2015-09-17T15:47:59Z : No. of bitstreams: 1 000844201_20170417.pdf: 265365 bytes, checksum: 60ac4d66c0bf8fec6b3786ac1bdfb893 (MD5) Bitstreams deleted on 2017-04-17T13:37:10Z: 000844201_20170417.pdf,. Added 1 bitstream(s) on 2017-04-17T13:38:02Z : No. of bitstreams: 1 000844201.pdf: 4524382 bytes, checksum: 5ff369d623286954892bfa373f80ed8c (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>A sílica apresenta características que a t

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Mutti, Alessandra Mara Garbosa. "Estudo de nanocompósitos luminescentes baseados em complexos de Eu(III) e Ir(III) ancorados à nanopartículas de sílica por bases de Schiff /." São José do Rio Preto, 2015. http://hdl.handle.net/11449/127580.

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Orientador: Sergio Antonio Marques de Lima<br>Coorientador: Ana Maria Pires<br>Banca: Valdemiro Pereira de Carvalho Júnior<br>Banca: Andrea Simone Stucchi de Camargo Alvarez Bernardez<br>Resumo: A sílica apresenta características que a torna uma boa matriz hospedeira de moléculas e biomoléculas, fazendo dela um material promissor para inúmeras aplicações, destacando-se catálise, liberação controlada de fármacos, desenvolvimento de biomarcadores e demais aplicações. Um biomarcador à base de sílica deve possuir um composto luminescente ligado covalentemente à superfície da matriz. Sendo assim, c

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Bain, Fiona Mair. "Yb:tungstate waveguide lasers." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1698.

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Lasers find a wide range of applications in many areas including photo-biology, photo-chemistry, materials processing, imaging and telecommunications. However, the practical use of such sources is often limited by the bulky nature of existing systems. By fabricating channel waveguides in solid-state laser-gain materials more compact laser systems can be designed and fabricated, providing user-friendly sources. Other advantages inherent in the use of waveguide gain media include the maintenance of high intensities over extended interaction lengths, reducing laser thresholds. This thesis present

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Mordenti, Stéphane. "Etude magnéto-optique dans le proche infrarouge de systèmes bidimensionnels élaborés à partir d'alliages II-VI ou III-V." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10127.

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Ce memoire presente des etudes magneto-optiques realisees dans le proche infrarouge de systemes bidimensionnels construits a partir des alliages cdhgte ou gainas. Les structures symetriques cd#yhg#1#-#yte/cd#xhg#1#-#yte ont ete etudiees sous champ magnetique (0,20 t) en luminescence et en abosorption. Les variations de formes quadratiques de la position des raies de luminescence sous champ montrent que la transition observee dans ce type de systemes fait intervenir une forte energie de liaison entre les porteurs des bandes de conduction et de valence. Nous l'avons d'ailleurs interpretee comme

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Valentin, François. "Optimisation du silicium amorphe hydrogéné préparé par décharge luminescente à basse fréquence pour l'utilisation dans divers dispositifs de type diode Schottky." Grenoble 1, 1987. http://www.theses.fr/1987GRE10173.

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Tseng, Mei-Ching, and 曾梅菁. "Luminescence and electronic research of ortho-metalated Ir(III) complexes." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/14604050344458971530.

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碩士<br>國立成功大學<br>化學系<br>87<br>英文摘要 In this research, the complexes Ir(bzpy)(N-N)Cl2(where N-N is 2,2￠-bipyridine (bpy) or 1,10-phenanthroline(phen), bzpy is ortho-C-deprotonated form of 2-benzoylpyridine) have been synthesized, and characterized with MS,IR and NMR spectra. For both complexes, cis α and cis β form isomers were obtained. The carbonyl absorption of bzpy of each complexes, about 1662 cm-1 in IR spectrum, indicates N-C- bonding form to metal Ir(Ⅲ), not N-O bonding form. The absorption spectrum of the complexes, which remain the characteristic of the ligands,

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Conroy, Cecil Vincent. "Optimization of Thiolate Stabilized Gold Nanoclusters For Near Infrared Emission in Subcellular Imaging." 2014. http://scholarworks.gsu.edu/chemistry_theses/64.

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Monothiolate protected gold nanoclusters with near IR luminescence underwent a five-to-ten fold enhancement of quantum efficiency by heating in the presence of excess thiols. Two monothiolate nanoclusters, mercaptosuccinic acid and tiopronin, were shown to benefit from this procedure. Emission maximum around 700-900 nm is favorable for bioimaging applications due to reduction of background signal from autofluorescence. Dithiolate lipoic acid protected gold nanoclusters with higher near IR quantum efficiency present an interesting candidate for biological imaging due to the difference in hydrop

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Sontakke, Atul Dnyaneshwar. "Studies on Energy Transfer in Rare-Earth Doped Glass and Glass-Ceramics for IR Luminescence and Visible Upconversion Applications." Thesis, 2012. http://cgcri.csircentral.net/3220/.

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Barros, Ana Rita Oliveira. "Desenvolvimento e caracterização de filmes finos transparentes para aplicações óticas." Master's thesis, 2017. http://hdl.handle.net/1822/54799.

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Dissertação de mestrado em Técnicas de Caracterização e Análise Química<br>Tecnologias como as células solares sensibilizadas por corante os concentradores solares luminescentes representam uma alternativa promissora na geração de energia fotovoltaica, sendo uma maneira eficiente e económica de converter diretamente a energia solar em energia elétrica e assim diminuir o recurso às energias não renováveis, como os combustíveis fósseis. A presente dissertação teve como tema principal o estudo e caracterização de filmes finos funcionais para aplicação nestes sistemas com o objetivo de confer

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