Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 180 for “"Chromophores"”.
-
The photophysics of fluorescent protein chromophores
… Surprisingly this diversity originates from chromophores which have very similar structures. Accordingly, minor changes to the chromophore structure or to its surroundings in the protein can produce dramatic changes in optical behaviour. In this work the photophysics of the chromophores of …
-
Excited states of chromophores and vibronic interactions
… on building a vibronic coupling model for multichromophores and extending that model to more general systems. This Dissertation serves as both a summary of this work as well as a manual for the two vibronic coupling programs I have written. It is my hope that the instructions written here are …
-
Non-invasive estimation of skin chromophores using Hyperspectral Imaging
… a turbid, inhomogeneous material, the skin has chromophores and scattering agents, which interact with light and produce characteristic back-scattered energy that can be harnessed and examined with an HSI camera. In this study, a mathematical model of the skin is used to extract meaningful …
-
Non-invasive Estimation of Skin Chromophores Using Hyperspectral Imaging
… a turbid, inhomogeneous material, the skin has chromophores and scattering agents, which interact with light and produce characteristic back-scattered energy that can be harnessed and examined with an HSI camera. To achieve this in this study, a mathematical model of the skin is used to extract …
-
Design of Singlet Fission Chromophores through the Introduction of N-Oxyl Fragments.
… by the small pool of existing singlet fission chromophores. Here, we report on the design of novel singlet fission chromophores through the substitution of N-oxyl fragments within the anthracene framework. The substantial diradical character brought on by the N-oxyl fragments located at …
-
Characterization of biological chromophores using fast electrophoretic analyses and multiphoton-exited fluorescence
A fast and highly sensitive technique has been developed for characterizing mixtures of biological molecules that should be useful for various applications, including investigations of enzymatic reactions with fast chemical kinetics, analysis of transient photochemical reactions, and probing …
-
Excited State Dynamics of Trans-Cis Photoisomerization in Photoactive Yellow Protein Chromophores
As an efficient and accurate quantum chemical method for photobiological and condensed phase applications, pseudospectral time-dependent density functional theory (PS-TDDFT) is presented, which alleviates the O(N4) scaling problem in two-electron integral calculations. For the test cases in this …
-
The design and synthesis of organic chromophores for Faraday rotation and photoluminescence
This thesis summarizes the design, synthesis, and application of novel small-molecule and polymeric materials, with emphasis on understanding and tuning the chromophore electronic structure to maximize properties including Faraday rotation and delayed fluorescence. In Chapter 1, we introduce the …
-
Design and synthesis of organic chromophores for imaging, lithography and organic electronics
… and photoreactivities of small-molecule organic chromophores can be tailored by (a) the choice of an appropriate parent structure and (b) the deliberate introduction of substituents that predictably alter the optical properties and photochemistry of this parent structure. Suitably-designed …
-
Ultrafast excited state reaction dynamics in light-driven unidirectional rotary molecular motors and fluorescent protein chromophores
… rotary motors and HBDI derivatives (synthetic chromophores of the green fluorescent protein (GFP)). In both cases, the excited state is selectively probed by ultrafast fluorescence up-conversion with a time resolution better than 50 fs. Molecular motors have biphasic (sub-picosecond and …
-
Identification of Near-Uv Chromophores and Characterization of Cellular Responses to Near-Uv Damage and Oxygen Stress
… UV-A region (315-400nm). The identification of chromophores that do absorb in the UV-A and UV-B region (280-315nm) is particularly important due to the potential decrease in protection from the ozone layer.
-
Nonlinear Optical Properties and Structural Characteristics of Ionically Self-Assembled Nanoscale Polymer Films Influenced by Ionic Concentration and Incorporation of Monomer Chromophores
… polycation layer, and random orientation of the chromophores within the bulk of each polyanion layer. A reduction in film thickness accompanied by an increase in net polar ordering is one possible avenue to obtain the second-order nonlinear optical susceptibility chi(2) necessary for …
-
Tuning the Photophysical and Biological Properties of a Series of Ruthenium-Based Chromophores and Chromophore Coupled Cisplatin Analogs with Substituted Terpyridine Ligands
… terpyridine containing ruthenium-based chromophores and chromophore coupled cisplatin analogs. The coupling of a light absorbing unit to a bioactive site offers the potential for developing supramolecules with multifunctional interactions with DNA and other biomolecules. A series of …
-
Design, Synthesis and Spectroscopy of Highly Absorptive Chromophores Based on the Bis(tridentate)metal-ethyne-(porphinato)metal Molecular Framework for Solar Energy Conversion
… common solar energy conversion applications and chromophores related to the discussed topics. Chapter Two describes an electron-deficient perfluoroalkyl-substituted bis(terpyridyl)Ru(II)-ethyne- (porphinato)Zn(II) chromophore that is endowed with intense panchromatic absorptivity, and long-lived, …
-
The mechanism of an unusual benzo/benzo photocycloaddition reaction : photophysical and photochemical investigation of [3.3] orthocyclophanes with two face-to-face preoriented benzenoid chromophores
… orthocyclophane (= OCP), in which two benzene chromophores are rigidly held in an unusually proximate, strongly interacting, face-to-face orientation, is the key step in the Pagodane - Dodecahedrane - Scheme. Due to the intriguing synthetic potential of the benzo/benzo (= B/B) dimer thus …
Page 1 of 9