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Dissertations / Theses on the topic 'Classification of dyes'

Author: Grafiati

Published: 3 June 2025

Last updated: 20 July 2025

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1

Kirstein, Johanna, Christophe Jung, Christian Hellriegel, and Christoph Bräuchle. "Single molecule spectroscopy: translational and rotational diffusion of single fluorescent dyes in nano-structured porous materials." Diffusion fundamentals 2 (2005) 94, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14431.

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2

Li, Fenghong. "Novel dopants for n-type doping of electron transport materials: cationic dyes and their bases." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1115196100406-90648.

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The history of silicon technology showed that controlled doping was a key step for the realization of e®ective, stable and reproducible devices. When the conduction type was no longer determined by impurities but could be controlled by doping, the breakthrough of classical microelectronics became possible. Unlike inorganic semiconductors, organic dyes are up to now usually prepared in a nominally undoped form. However, controlled and stable doping is desirable in many organic-based devices as well. If we succeed in shifting the Fermi level towards the transport states, this could reduce ohmic

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3

Xu, S. L., J. Xu, J. M. Lu, and T. D. Li. "A Multifunctional Gelatin-Quaternary Ammonium Copolymer Exhibiting Superior Anionic Dye Adsorption for Efficient Emission Reduction in Leather Tanning Process - 150." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34411.

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Leather wastewater is one of the most polluting industrial emissions. An in-situ, green, and innovative strategy that limits dye emissions is required to replace subsequent waste management. A novel cationic protein with a high quaternary ammonium degree was designed and synthesized. The results show that at concentrations ranging from 3 to 15 wt%, this cationic protein rapidly and completely adsorbs Direct Purple N and Acid Black 24 within 5 min. A remarkable efficiency in removing Acid Red 73, Acid Golden G, Acid Lake Blue A, Acid Green, and Acid Orange II, with >96% removal rates, was achie

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4

Levichkova, Marieta. "Influence of the Matrix Environment on the Optical Properties of Incorporated Dye Molecules." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A24056.

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The present thesis is concerned with solid solutions of organic dyes. The organic molecules are incorporated in both optically inert or active and in rigid or flexible matrices, respectively. Exclusively thin films prepared by physical vapor deposition are studied. The optical response of the systems, in dependence on their structure and on the matrix nature, is investigated by means of absorption and luminescence spectroscopy. In the first part, perylene and 2,2-difluoro-1,3,2-dioxaborine derivatives, and Alq3 (tris(8-hydroxyquinoline) aluminium) embedded in the optically inactive SiO2 and po

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5

Werner, Ansgar. "N-type doping of organic thin films using a novel class of dopants." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2003. http://nbn-resolving.de/urn:nbn:de:swb:14-1065713047781-36629.

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I present a new approach to stable n-type doping of organic matrices using organic dopants. In order to circumvent stability limitations of strong organic donors, I produce the donor from a stable precursor compound in situ. As an example, the cationic dye pyronin B chloride is studied as a dopant in an 1,4,5,8-naphthalene tetracarboxylic dianhydride (NTCDA) matrix. A field effect and conductivity study of a series of doped NTCDA samples is carried out. It proves the increase of the electron density with the doping concentration. Conductivities up to 1.9*10^-4 S/cm are obtained for doped NTCDA

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6

Christofi, Chris. "On the structure, enumeration and classification of Youden squares and DYRs." Thesis, University of Kent, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358077.

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7

Gresser, Roland, Alexander Hoyer, Markus Hummert, Horst Hartmann, Karl Leo, and Moritz Riede. "Homoleptic Co(II), Ni(II), Cu(II), Zn(II) and Hg(II) complexes of bis-(phenyl)-diisoindol-aza-methene." Royal Society of Chemistry, 2011. https://tud.qucosa.de/id/qucosa%3A27773.

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The synthesis of five homoleptic transition metal complexes of bis-(phenyl)-diisoindol-aza-methene is described together with the optical, electrochemical and thermal properties of these compounds. Additionally, crystal structures for the Co and the Zn complex are reported.<br>Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.

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8

Täuber, Daniela, Jörg Schuster, Mario Heidernätsch, Michael Bauer, Günter Radons, and Borczyskowski Christian von. "Discrimination between static and dynamic heterogeneities in single dye diffusion in ultrathin liquid films." Diffusion fundamentals 11 (2009) 76, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A14041.

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9

Linnemann, J., J. Giorgio, K. Wagner, G. Mathieson, G. G. Wallace, and D. L. Officer. "A simple one step process for enhancement of titanium foil dye sensitised solar cell anodes." Royal Society of Chemistry, 2015. https://tud.qucosa.de/id/qucosa%3A36240.

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The photo-conversion efficiency and stability of back-illuminated dye sensitised solar cells with titanium foil based photoanodes are enhanced by a simple nitric acid treatment through which the foil is passivated. This treatment changes the morphology of the titanium foil and increases its electrochemical double layer capacitance.

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10

Lan, Phung Thi, and Nguyen Thi Kim Giang. "Study on synthesis of MoS2modified g-C3N4materials for treatment of Direct black 38 dye." Caprice Thomas, Abt. 3.3.3 Qucosa, 2018. https://tud.qucosa.de/id/qucosa%3A33074.

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Pure g-C3N4 and MoS2 modified g-C3N4 materials were synthesized using a facile heating method and a low-temperature hydrothermal method, respectively. The obtained samples were characterized by XRD pattern and N2 adsorption-desorption technique at 77K. The adsorption and photocatalytic performance of all obtained samples were investigated by discoloration of direct black 38 dye in the dark and under visible light irradiation. The results showed that all obtained samples exhibited good discoloration efficiency of direct black 38 dye. The two factors including pH values and Mo loading effected m

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11

Lungwitz, Ralf. "Ionische Flüssigkeiten – Polarität und Wechselwirkungen mit silikatischen Oberflächen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-68621.

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Gegenstand der vorliegenden Arbeit ist die UV/Vis-spektroskopische Bestimmung der Kamlet-Taft-Polaritätsparameter von strukturell unterschiedlichen Ionischen Flüssigkeiten (ILs), mit Hilfe von spezifischen solvatochromen Sondenmolekülen. Dabei wurden der Einfluss des Anions und Kations auf die Polarität, sowie die Stärke der Wechselwirkung zwischen beiden Ionen untersucht. Es konnte für Ionischen Flüssigkeiten mit dem 1-Butyl-3-methylimidazoliumkation eine 1H-NMR-spektroskopische Methode zur Ermittlung der Polaritätsparameter entwickelt werden. Diese bietet den Vorteil, dass sie auch bei farbi

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12

Bui, Xuan Dung, Thi Hoai Thu Vu, Thi My Linh Nguyen, and Takashi Gomi. "Temporal and spatial infiltration characteristics of soil under acacia and pine plantations in the mountainous area of Van Don, Quang Ninh, Vietnam." Technische Universität Dresden, 2019. https://tud.qucosa.de/id/qucosa%3A70826.

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To determine the soil infiltration characteristics of pine and acacia plantations, we used a double-ring infiltrometer in 15 different locations of up-hill, mid-hill and down-hill part in each kind of plantation from June to August, 2018. The spatial infiltration characteristics of the soil at three plots (with no tree, with acacia tree and with pine tree) was determined by dye tracer method. The factors having an impact to the infiltration process were also analyzed. The main findings include: (1) The soil infiltration rate under both pine and acacia plantation decreased over time and it was

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13

Ferl, Sandra, Gerd Wunderlich, René Smits, Alexander Hoepping, Anne Naumann та Jörg Kotzerke. "Synthesis of a new HYNIC-DAPI derivative for labelling with ⁹⁹ᵐTechnetium and its in vitro evaluation in an FRTL5 cell line". Royal Society of Chemistry, 2015. https://tud.qucosa.de/id/qucosa%3A36278.

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4′,6-Diamidine-2-phenylindole (DAPI) is a common fluorochrome that is able to bind to deoxyribonucleic acid (DNA) with distinct, sequence-dependent enhancement of fluorescence. This work presents the synthesis of a new multifunctional compound that includes the fluorescent dye as a ⁹⁹ᵐTechnetium (⁹⁹ᵐTc) carrier. A new technique for the bioconjugation of DAPI with 6-hydrazinonicotinic acid (HYNIC) through an amide linkage was developed. The radiolabelling was performed with HYNIC as a chelator and N-Ĳ2-hydroxy-1,1-bisĲhydroxymethyl)ethyl)glycine (tricine) as a coligand. Furthermore, experimenta

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14

Conrad, Catleen. "Bernhard-von-Cotta-Preis 2014: Reinigung und Charakterisierung von zwei Peroxidasen DypA und DypB aus Rhodococcus opacus 1CP." TU Bergakademie Freiberg, 2015. https://tubaf.qucosa.de/id/qucosa%3A23086.

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Das Bodenbakterium Rhodococcus opacus 1CP ist für sein Potenzial bekannt, organische Schadstoffe abzubauen. In dieser Studie lag der Fokus auf zwei Genprodukten, den farbstoffabbauenden Peroxidasen DypA und DypB, welche unter Anwendung von Klonierungs- und Expressionsstrategien mit hohen spezifischen Aktivitäten in reiner Form gewonnen werden konnten. Eine umfassende biochemische Analyse zeigte, dass beide Enzyme in der Lage sind, Farbstoffe unterschiedlicher Klassen, insbesondere jedoch, die als schwer abbaubar geltenden Anthraquinone, strukturell anzugreifen. Damit stellen sie lohnenswerte e

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15

Nikpay, Mitra. "Experimental investigation of the stability of the colmation zone around leaky sewers." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-191137.

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Sewage exfiltration from a sanitary and combined sewer systems and its percolation into porous medium results in a clogged or colmation layer in the nearby soil. In order to develop a comprehensive understanding of raw sewage transport mechanisms in porous media, investigations were carried out on the micro-scale properties of the multiphase system. In our laboratory experiments, the role of surfactants as a major organic chemical compound in wastewater was evaluated by using a surfactant solution as an artificial wastewater percolating into a porous media, represented by using columns and Ple

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16

Meyer, Jörg, Anja Wadewitz, Lokamani, et al. "Molecules for organic electronics studied one by one." Royal Society of Chemistry, 2011. https://tud.qucosa.de/id/qucosa%3A27781.

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The electronic and geometrical structure of single difluoro-bora-1,3,5,7-tetraphenyl-aza-dipyrromethene (aza-BODIPY) molecules adsorbed on the Au(111) surface is investigated by low temperature scanning tunneling microscopy and spectroscopy in conjunction with ab initio density functional theory simulations of the density of states and of the interaction with the substrate. Our DFT calculations indicate that the aza-BODIPY molecule forms a chemical bond with the Au(111) substrate, with distortion of the molecular geometry and significant charge transfer between the molecule and the substrate.

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17

Cherkouk, Charaf. "Östrogennachweis in wässrigen Lösungen mit Hilfe Silzium-basierter Lichtemitter." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-62465.

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In dieser Arbeit wurde ein Sensorkonzept mit Hilfe der Si-basierten Lichtemitter (MOSLED) zum Östrogennachweis in wässrigen Lösungen entwickelt. Das Sensorkonzept basiert auf einer direkten Fluoreszenzanalyse und besteht aus der Anordnung der Bio-Komponenten und dem Verfahren zu ihrer Herstellung sowie dem eigentlichen Meßverfahren. Die Anordnung besteht aus drei Teilen: die Funktionalisierung der MOSLED-Oberfläche, die Immobilisierung des hER_-Rezeptors und die Herstellung der Referenzlösung. Den Schwerpunkt dieser Arbeit bildet die Ausführung dieser drei Teile. Die Funktionalisierung der SiO

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18

Trenkmann, Ines. "Mikroskopie und optische Spektroskopie an heterogenen Nano- und Mikrostrukturen: Halbleiter-Nanokristalle, molekulare Farbstofffilme und funktionalisierte Hybridstrukturen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-175178.

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In dieser Arbeit wird die Abhängigkeit der Photolumineszenz (PL) von CdSe/ZnS-Nanokristallen von der Umgebung und der Einfluss der Filmdicke und -morphologie auf die optische Absorption von Farbstofffilmen untersucht sowie die Oberfläche von Hybridstrukturen durch Funktionalisierung mit Farbstoff analysiert. Untersuchungen von CdSe/ZnS-Nanokristallen in Toluol-Lösung zeigen, dass die PL-Intensität der Nanopartikel durch Zugabe des organischen Halbleiters TPD gequencht wird. Die zusätzliche Auswertung der PL-Lebensdauer verdeutlicht, dass die Abnahme (fast) vollständig durch statisches Quenchen

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19

Schreiter, Katja. "Aminosäurefunktionalisierte Chromophore als solvatochrome Sondenmoleküle." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-62805.

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In der vorliegenden Arbeit wird die Synthese und Charakterisierung von chiralen prolylfunktionalisierten Farbstoffen vorgestellt. Als chromophore Schlüsselverbindungen wurden Nitroaniline aber auch größere push-pull pi-Systeme wie Schiffsche Basen, Azofarbstoffe und Merocyanine gewählt. Im Fokus dieser Arbeit stehen dabei deren solvatochrome Eigenschaften, pH-Sensitivität sowie mögliche Wechselwirkung mit Biomolekülen und verschiedenen An- und Kationen. Zusätzlich erfolgten Umsetzungen ausgewählter prolylfunktionalisierter chromophorer Bausteine zu Estern und Amiden. Der Einfluss des Prolylbau

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20

Salem, Tarek Sayed Mohamed. "Plasma-based surface modifications of polyester fabrics and their interaction with cationic polyelectrolytes and anionic dyes." Doctoral thesis, 2011. https://monarch.qucosa.de/id/qucosa%3A19664.

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Plasma-based surface modifications offer many interesting possibilities for the production of high value-added polymeric materials. In this work, different plasma-based synthetic concepts were employed to endow poly(ethylene terephthalate) (PET) fabrics with accessible amine functionalities. These concepts were compared to find out the appropriate engineering methods, which can be further accepted by textile industries to overcome the limited reactivity of PET fabric surfaces, while the bulk characteristics are kept unaffected. Amine functionalities were introduced onto the surface of PET fabr

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21

Pecyna, Marek. "Molekularbiologische Charakterisierung von Häm-Thiolat- und DyP-type-Peroxidasen ausgewählter Basidiomyceten." Doctoral thesis, 2015. https://tud.qucosa.de/id/qucosa%3A29761.

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Peroxidasen des Typs ClassII sowie die Chlorperoxidase waren für mehrere Jahrzehnte die einzigen bekannten sekretorischen Hämperoxidasen aus Pilzen. Im Jahr 2004 wurde eine neue, ungewöhnliche Hämperoxidase aus dem Speisepilz Agrocybe aegerita isoliert und biochemisch charakterisiert. Diese Peroxidase, heute offiziell Unspezifische Peroxygenase (UPO, EC 1.11.2.1) genannt, vereint in sich Eigenschaften sowohl intrazellulärer Cytochrom-P450-Enzyme als auch klassischer extrazellulärer, pilzlicher Peroxidasen des Typs ClassII. In dieser Arbeit wurden für den UPO-Modellorganismus A. aegerita und fü

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22

Rane, Mahendra. "Porous Membrane." Doctoral thesis, 2009. https://monarch.qucosa.de/id/qucosa%3A19284.

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Membrane processes can cover a wide range of separation problems [with a specific membrane (membrane structure) required for every problem]. Thus, there are membranes available that differ in their structure and consequently in the functionality. Therefore membrane characterization is necessary to ascertain, which membrane may be used for a certain separation. Membranes of pore size ranging from 100nm to 1μm with a uniform pore size are very important in membrane technology. An optimum performance is achieved when the membrane is as thin as possible having a uniform pore size. Here in this the

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23

Janke, Thomas. "Hydrodynamical investigations of liquid ventilation by means of advanced optical measurement techniques." 2020. https://tubaf.qucosa.de/id/qucosa%3A75406.

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Although liquid ventilation has been researched and studied for the last six decades, it did not achieve its expected optimal performance. Within this work, a deeper understanding of the fluid dynamics during liquid ventilation shall be gathered to extend the already available clinical knowledge about this ventilation strategy. In order to reach this goal, advanced optical flow measurement techniques are applied in different models of the human conductive airways to obtain global velocity fields, identifying prominent flow structures and to determine important dissolved oxygen transport paths.

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24

Forker, Roman. "Electronic Coupling Effects and Charge Transfer between Organic Molecules and Metal Surfaces." Doctoral thesis, 2009. https://tud.qucosa.de/id/qucosa%3A24145.

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We employ a variant of optical absorption spectroscopy, namely in situ differential reflectance spectroscopy (DRS), for an analysis of the structure-properties relations of thin epitaxial organic films. Clear correlations between the spectra and the differently intense coupling to the respective substrates are found. While rather broad and almost structureless spectra are obtained for a quaterrylene (QT) monolayer on Au(111), the spectral shape resembles that of isolated molecules when QT is grown on graphite. We even achieve an efficient electronic decoupling from the subjacent Au(111) by ins

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25

Wagner, Christian. "Potential Energy Minimization as the Driving Force for Order and Disorder in Organic Layers." Doctoral thesis, 2009. https://tud.qucosa.de/id/qucosa%3A25311.

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The topic of this work is the structural characterization and theoretical modeling of organic single and heterolayers. The growth of sub-monolayers and monolayers (ML) of the two polycyclic aromatic hydrocarbons quaterrylene (QT) and hexa-peri-hexabenzocoronene (HBC) on Ag(111) and Au(111) was investigated. A transition from a disordered, isotropic phase to an ordered phase with increasing coverage was found. The lattice of the ordered phase turned out to be coverage dependent. The intermolecular potential was modeled including Coulomb and van der Waals interaction by a force-field approach. T

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