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Dissertations / Theses on the topic 'Photophysical Dynamics'

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1

Murphy, Robert Scott. "Photophysical studies on the dynamics of guest complexation with cyclodextrins." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0017/NQ47292.pdf.

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2

Schäfer, Stephan. "Fluorescence imaging microscopy studies on single molecule diffusion and photophysical dynamics." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1175001255490-38090.

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Within the last years, e.g. by investigating the fluorescence of single molecules in biological cells, remarkable progress has been made in cell biology extending conventional ensemble techniques concerning temporal / spatial resolution and the detection of particle subpopulations [82]. In addition to employing single fluorophores as "molecular beacons" to determine the position of biomolecules, single molecule fluorescence studies allow to access the photophysical dynamics of genetically encoded fluorescent proteins itself. However, in order to gain statistically consistent
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3

Schäfer, Stephan. "Fluorescence imaging microscopy studies on single molecule diffusion and photophysical dynamics." Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A24827.

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Within the last years, e.g. by investigating the fluorescence of single molecules in biological cells, remarkable progress has been made in cell biology extending conventional ensemble techniques concerning temporal / spatial resolution and the detection of particle subpopulations [82]. In addition to employing single fluorophores as "molecular beacons" to determine the position of biomolecules, single molecule fluorescence studies allow to access the photophysical dynamics of genetically encoded fluorescent proteins itself. However, in order to gain statistically consistent
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4

Budkina, Darya S. "Ultrafast photophysical and photochemical dynamics of polyhalogenated alkanes, cycloalkanes, and transition metal complexes." Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1553686775405944.

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5

Venugopal, Karunakaran. "Femtosecond solvation, excited state dynamics, and photophysical properties of chromophores used in polynucleic acids." Doctoral thesis, [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=983550263.

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6

Etzold, Fabian [Verfasser]. "A photophysical study of excited state dynamics in donor-acceptor copolymer photovoltaic blends / Fabian Etzold." Mainz : Universitätsbibliothek Mainz, 2015. http://d-nb.info/1077893345/34.

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7

Glik, Elena A. "Spectroscopic Investigation of the Excited State Properties of Platinum(Ii) Charge Transfer Chromophores." Bowling Green, Ohio : Bowling Green State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1256141493.

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8

Stachelek, Patrycja. "Photophysics of multicomponent molecules under dynamic control." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3525.

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This work focusses on seeking to gain a deep understanding of the photophysical processes inherent to multi-functional and/or multi-component supermolecules in the condensed phase. To do this, a variety of molecular systems have been subjected to spectroscopic examination, most commonly using steady-state and time-resolved emission spectroscopy to interrogate the samples. A common feature of all the molecular architectures examined herein relates to the possibility for structural motion on timescales of concern to the photophysical event. Furthermore, to provide a spectroscopic signature, most
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9

Dimitrov, Stoichko Dimitrov. "Ultrafast Excited State Dynamics in DNA and other Nanomaterials." Thesis, Boston College, 2010. http://hdl.handle.net/2345/2010.

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Thesis advisor: Torsten Fiebig<br>Thesis advisor: Mary Roberts<br>Understanding the electronic nature of DNA is profound and has been attempted for decades. Photoexcitation of DNA with UV light deposits electronic energy in the base stack and prepares highly reactive excited states. These states are precursors for photoinduced damage reactions which can lead to mutations and ultimately to cell death. While many DNA photo products have been isolated and characterized, the primary events immediately after photon absorption are not yet understood. Recent studies with ultrafast lasers have reveale
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10

Yu, Jierui. "PHOTOPHYSICS OF CHROMOPHORE ASSEMBLIES IN POROUS FRAMEWORKS." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1926.

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Chromophore is a molecule or a part of a molecule which is responsible for its appearance color. This definition has been evolving over time with the progress of science. Contemporary scientific advances have expanded its meaning: to an inclusive level, chromophore is an irreducible collective of fundamental particles, which can represent the photophysical (optical physical) properties of the macroscopic matter. Previous studies have already found that the same molecule can have different photophysical properties under different condensed states. Therefore, it is straight forward to conclude t
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11

Tamai, Yasunari. "Excited State Dynamics in Nanostructured Polymer Systems." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/174961.

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12

Hare, Patrick Michael. "Excuted state dynamics in DNA base monomers: the effects of solvent and chemical modification in ultrafast internal conversion." The Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1166623261.

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13

Law, Yu Kay. "Relationship Between the Kinetics of Thymine Dimer Formation and the Excited State Dynamics of DNA." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276861431.

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14

King, Albert W. "Structural Characterization and Spectroscopic Investigation of Isomerization Dynamics inPhotochromic Polypyridyl Ruthenium(II) Chelating mono- and bis-Sulfoxide Complexes." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1427716619.

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15

Tiwana, Priti. "Ultrafast charge dynamics in mesoporous materials used in dye-sensitized solar cells." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:ba3cbbce-3119-4043-a499-c0ca74287d42.

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This thesis is concerned with measuring ultrafast electron dynamics taking place in dye-sensitized mesoporous semiconductor films employed as working electrodes in dye-sensitized solar cells (DSCs). An understanding of these ultrafast charge transfer mechanisms is essential for designing efficient photovoltaic (PV) devices with high photon-to-current conversion efficiency. Optical-pump terahertz-probe (OPTP) spectroscopy is a sub-picosecond resolution, non-contact, photoconductivity measurement technique which can be used to directly measure charge carrier dynamics within nanostructured materi
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16

Zhang, Lei. "Exploring Electron Transfer Dynamics of Novel Dye Sensitized Photocathodes : Towards Solar Cells and Solar Fuels." Doctoral thesis, Uppsala universitet, Fysikalisk kemi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302263.

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The design of dyes for NiO-based dye-sensitized solar cells (DSSCs) has drawn attention owing to their potential applications in photocatalysis and because they are indispensable for the development of tandem dye-sensitized solar cells. The understanding of the electron transfer mechanisms and dynamics is beneficial to guide further dye design and further improve the performance of photocathode in solar cells and solar fuel devices. Time-resolved spectroscopy techniques, especially femtosecond and nanosecond transient absorption spectroscopy, supply sufficient resolution to get insights into t
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17

Telles, Do Casal Mariana. "Molecular dynamics and electronic structure simulations of photoexcited chromophores in the gas-phase and complex environments." Electronic Thesis or Diss., Aix-Marseille, 2022. http://theses.univ-amu.fr.lama.univ-amu.fr/220916_TELLESDOCASAL_482lt726dkah904g486xpmri_TH.pdf.

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Le développement d'une nouvelle classe de molécules calorifères, déposées directement sur les plantes, est une nouvelle stratégie pour étendre les lieux propices à l'agriculture à des altitudes plus élevées, en prévenant les dommages causés par le froid. L'idée sous-jacente est que ces molécules calorifères sont capables d'absorber le rayonnement UV-visible et de le convertir en chaleur, dans ce cas, à destination de la surface des feuilles. Inspirés par les stratégies photoprotectrices efficaces trouvées dans la nature, nous étudions des dérivés du malate de sinapoyle (SM). Après absorption d
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18

Gahlot, Sapna. "Asterisk-shaped arenes and heteroarenes incorporating sulfur, oxygen and nitrogen : synthesis, structures, photophysics, dynamic and supramolecular covalent chemistry." Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0097.

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Le contenu de cette thèse porte sur les astérisques moléculaires fonctionnalisés, ramifiés et polysulfurés, polyoxygénés ou polycyanés incorporant soit un noyau benzénique, un noyau pyridine, ou un noyau pyrène. Les principaux objectifs sont de rapporter la synthèse et les propriétés structurales, photophysiques, supramoléculaires et covalentes dynamiques des architectures moléculaires nouvellement créées, afin de développer d'autres utilisations et applications de celles-ci dans un futur proche, vers l'électronique moléculaire, l'imagerie, les sciences des matériaux et de la vie. Elle interro
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19

Middleton, Chris T. "Vibrational and Excited-State Dynamics of DNA Bases Revealed by UV and Infrared Femtosecond Time-Resolved Spectroscopy." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211937433.

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20

Henline, Kylie Marie. "Amine- and Sulfide-Sensing Copper(I) Iodide Films and the Structure, Dynamics, and Photophysics in the Copper(I) Iodide-Tetrahydrothiophene System." W&M ScholarWorks, 2014. https://scholarworks.wm.edu/etd/1539626958.

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21

Pincet, Lancelot. "Dynamic excitation systems for quantitative and super-resolved fluorescence microscopy." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP033.

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La microscopie de localisation de molécule unique (SMLM) est une technique optique super-résolue permettant d'observer des échantillons biologiques marqués par des fluorophores avec une résolution bien inférieure à la limite de diffraction. La qualité de cette imagerie dépend fortement de la capacité à observer les molécules de manière individuelle, ce qui nécessite un contrôle précis de la photophysique des fluorophores pour qu'ils émettent de manière décalée dans l'espace et le temps. Jusqu'à présent, les méthodes d'excitation dynamique visaient à produire une illumination uniforme sur des c
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22

Loftus, Lauren Marie. "Tuning the Excited States and Reactivity of Polypyridyl Ru(II) Complexes for Photochemotherapy." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu156579728991504.

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23

González, Yoelvis Orozco. "Fotofísica e propriedades dinâmicas de sistemas moleculares." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-26032013-150724/.

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A fotodinâmica de sistemas moleculares representa um dos principais tópicos atuais da físico-química molecular. O conhecimento das propriedades dos estados eletrônicos excitados tem permitido desenvolver áreas de vital importância como das energias renováveis, da fotomedicina, dos sensores fluorescentes, entre outras. O objetivo desta tese está orientado a estudar teoricamente a influência do meio (ou efeito de solvente) na fotofísica e nas propriedades dos estados eletrônicos excitados de sistemas moleculares. Nesta tese, primeiramente foi feito um estudo em fase gasosa da superfície de ener
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24

Ruiz-Barragán, Sergi. "Modelling of potential energy surfaces for photochemistry: conical intersections and application to optical control." Doctoral thesis, Universitat de Girona, 2014. http://hdl.handle.net/10803/283964.

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Conical Intersections (CI) are points in Potential Energy Surfaces (PES) of two or more states that have the same energy. They are fundamental to understand photo-chemical processes. These points are not isolated points, CI form seam between PES. One way to study they is to find the minimum energy CI (MECI). For this reason, in this thesis, a new algorithm for finding MECI has been proposed: Double Newton-Raphson (DNR). The algorithm has been implemented in Gaussian® program for fully-quantum calculations and ONIOM ones. It has been tested with other algorithms with a test set with correct res
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25

Posenitskiy, Evgeny. "Dynamique moléculaire non-adiabatique des complexes de type PAH." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30080.

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Les hydrocarbures aromatiques polycycliques (PAH) ont été proposés comme porteurs principaux de bandes interstellaires diffuses observées dans le milieu interstellaire, motivant des études approfondies de leur réponse photophysique et photochimique au rayonnement UV. Les mécanismes sous-jacents en compétition déterminent l'évolution du gaz dans le milieu interstellaire. L'objectif principal de cette thèse est de décrire et de comprendre les mécanismes de relaxation dans des PAHs de grande taille, par des simulations de dynamique moléculaire non-adiabatique, couplées à l'approche de la réponse
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26

Felouat, Abdellah. "Synthèse et études photophysiques de matériaux PI-conjugés - Complexes de difluorure de Bore des ligands Beta-dicétone à conjugaison PI-étendue." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4036.

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Une nouvelle famille de complexes de difluorure de bore photosensibles est développée. Elle est basée sur des structures moléculaires contenant une unité β-dicétone à conjugaison électronique π.La grande variété de groupements aromatiques et la nature donneur ou accepteur d'électrons des différents substituants permet l'élaboration de systèmes électroniques donneur-accepteur-donneur d'électrons (D1-A-D1) et donneur-accepteur (D2-A).L'absorption électronique de cette famille de molécule se situe dans la partie visible du spectre électromagnétique et une partie du spectre ultraviolet, et est car
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27

"Photophysical Properties and Applications of Fluorescent Probes in Studying DNA Conformation and Dynamics." Doctoral diss., 2015. http://hdl.handle.net/2286/R.I.29730.

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abstract: Fluorescence spectroscopy is a popular technique that has been particularly useful in probing biological systems, especially with the invention of single molecule fluorescence. For example, Förster resonance energy transfer (FRET) is one tool that has been helpful in probing distances and conformational changes in biomolecules. In this work, important properties necessary in the quantification of FRET were investigated while FRET was also applied to gain insight into the dynamics of biological molecules. In particular, dynamics of damaged DNA was investigated. While damages in DNA ar
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28

Manna, Anamika. "Photophysical Studies of some Organic Molecules and their Modification in some Restricted Organized Assemblies and Heterogeneous Media." Thesis, 2019. http://hdl.handle.net/10821/8318.

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The study has been done for the investigations on the photophysical characteristics of organic moleculecules and the effect of different organized media and environmental conditions on its photophysical dynamics by analyzing their steady state and time-resolved spectroscopic method. Some theoretical calculations have also been done to substantiate the experimental findings. All the studies have been carried out under the supervision of Professor Sankar Chakravorti in the Department of spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India. The thesis c
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29

Schäfer, Stephan [Verfasser]. "Fluorescence imaging microscopy studies on single molecule diffusion and photophysical dynamics / vorgelegt von Stephan Schäfer." 2007. http://d-nb.info/983791031/34.

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30

Venugopal, Karunakaran [Verfasser]. "Femtosecond solvation, excited state dynamics, and photophysical properties of chromophores used in polynucleic acids / von Karunakaran Venugopal." 2007. http://d-nb.info/983550263/34.

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31

Sudhakar, Narra, and 蘇達克. "Structure and Dynamics of Transient Species Produced in Condensed-Phase Photophysical and Photochemical Reactions as Elucidated by Nanosecond Time-Resolved Near/Mid-IR Spectroscopy." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/73k53w.

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博士<br>國立交通大學<br>應用化學系碩博士班<br>103<br>In this Thesis, the author presents unprecedentedly detailed studies on the structure and dynamics of ionic and neutral transient species that are of crucial importance in molecular photovoltaic devices, using nanosecond time-resolved near/mid-IR spectroscopy with the help of density functional theory (DFT) calculations and chemometrics techniques. The author has investigated (1) the back electron transfer (BET) dynamics in photoinduced intermolecular electron transfer reaction between pyrene (Py) and 1,4-dicyanobenzene (DCB) in acetonitrile and (2) the stru
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32

Pu, Shih-Chieh, and 浦士杰. "1. Spectroscopy and Femtosecond Dynamics on the Excited-State Proton/Charge Transfer Coupled Reaction2. The Photophysical Properties of the Azulenylocyanine Dye, a Near-infrared Nonfluorogenic Quencher3. Carrier Relaxation Dynamic of the II-VI Semicondu." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/95027078378717371981.

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博士<br>國立臺灣大學<br>化學研究所<br>94<br>Part I: Detailed insights into the excited state intramolecular proton transfer (ESIPT) reaction in 2-(2’-hydroxy-4’-dietheylaminophenyl) benzothiazole (HABT) have been investigated via steady state and femtosecond fluorescence up-conversion approaches. In cyclohexane, in contrast to the ultrafast rate of ESIPT for the parent 2-(2’-hydroxyphenyl) benzothiazole (> 35 fs-1), HABT undergoes a resolvable, relatively slow rate (~1.8 ps-1) of ESIPT. In polar, aprotic solvents competitive rate of proton transfer and rate of solvent relaxation was resolved in the early d
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33

Shih-Chieh, Pu. "1. Spectroscopy and Femtosecond Dynamics on the Excited-State Proton/Charge Transfer Coupled Reaction 2. The Photophysical Properties of the Azulenylocyanine Dye, a Near-infrared Nonfluorogenic Quencher 3. Carrier Relaxation Dynamic of the II-VI Semiconductor Quantum Dot and Size-dependent of the two-photon excitation Cross-Section relation." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-0107200612412400.

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34

Mirkovic, Tihana. "Synthesis, Dynamics and Photophysics of Nanoscale Systems." Thesis, 2009. http://hdl.handle.net/1807/17801.

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The emerging field of nanotechnology, which spans diverse areas such as nanoelectronics, medicine, chemical and pharmaceutical industries, biotechnology and computation, focuses on the development of devices whose improved performance is based on the utilization of self-assembled nanoscale components exhibiting unique properties owing to their miniaturized dimensions. The first phase in the conception of such multifunctional devices based on integrated technologies requires the study of basic principles behind the functional mechanism of nanoscale components, which could originate from individ
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35

Balawi, Ahmed. "Photophysics of Organic Molecular Systems – A Study of Excited State Dynamics." Diss., 2019. http://hdl.handle.net/10754/660290.

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This thesis is dedicated to studies of the excited-state dynamics in organic molecular systems for solar energy conversion by employing time-resolved experimental techniques. Organic photovoltaic (OPV) devices have received significant attention in the past decade and reaching record high power conversion efficiencies (PCE) above 17%. An essential step towards reaching the predicted PCE limit of 25.5% is to develop a comprehensive picture of the photophysical processes, specifically the loss processes, in OPV devices. It is the aim of this thesis to investigate and understand the fate of excit
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36

Zheng, Zhen-Bang, and 丁振邦. "Static and Dynamic Characterization of Poly(vinyl alcohol-g-sodium styrenesulfonate)[PVA-g-SSS]Hydrogels-Swelling, Elastic and Photophysical Properties." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/39342830116370097155.

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37

Thomson, Mark David [Verfasser]. "Photophysics, electronic structure and picosecond excited-state dynamics of boron-nitrogen-bridged ferrocene-donor organic-acceptor charge-transfer compounds / von Mark David Thomson." 2005. http://d-nb.info/974415405/34.

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