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.
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Showing 1 to 20 of 286 for “"photophysical"”.
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Photophysical Properties of Emerging 2D Materials
Photophysics is a branch of physical science that underpins a wide range of light-based applications. This field has emerged as a powerful tool for exploring light–matter interactions, enabling researchers to understand the behaviour of materials through optical and optoelectronic properties of …
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Photophysical Properties of Anthracenic Metal Organic Frameworks
… Anthracene is a polyaromatic hydrocarbon whose photophysical properties have been found to be easily tuned through structural modifications. The tunability of anthracene makes it an ideal candidate for use in luminescent devices, such as photoprobes and organic light emitting diodes. MOFs …
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Synthesis, Self-Assembly and Photophysical Properties of Multichromophoric Systems
… interactions can be utilized to improve the photophysical properties and processes (e.g. transport of excitation energy) of the supramolecular aggregates. This thesis deals with the synthesis, the self-assembly and the investigation of photophysical properties of novel multichromophoric …
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Modeling the chemical and photophysical properties of gold complexes.
… computationally investigated, to probe their photophysical, geometric, and bonding properties. The geometry of AuI complexes (ground state singlet) is very sensitive to the electronic nature of the ligands: σ-donors gave a two-coordinate, linear shape; however, σ-acceptors yielded a …
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Strategies to Optimize Photophysical Properties in Cyclometalated Iridium Complexes
… the synthesis, structural characterization, and photophysical properties of several new iridium-based complexes. The research is divided into six sections, each contributing to our understanding of the versatile applications and unique characteristics of these compounds. Chapter 1 provides an …
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Tuning the photophysical properties of amidophosphine complexes of copper
A series of monomeric copper complexes that allow for the tuning of the emission properties is reported. Luminescence lifetimes up to 150 [mu]s are observed in benzene solution at ambient temperature, which are comparable to the lifetimes of the longest-lived previously reported copper …
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Photophysical transformations in molecules studied by ultrafast multi-pulse spectroscopy /
This dissertation aims at exploring excited state photoevolution of three different systems by the means of transient absorption spectroscopy. First two chapters are dedicated to the theoretical background, the description of the objects of the study and the experimental tools used. The following …
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Photochemical, photophysical, and photobiological studies of zeolite guest-host complexes
… The first chapter describes the preparation and photophysical and photochemical characterization of two new photocatalytic materials. The catalysts are based on a multi-component zeolite, host-guest complex and the interaction between components was probed using time-resolved spectroscopic …
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Photophysical Studies of Active Layer Compositions in Organic Solar Cells
… a particular type of CT state. Morphological and photophysical techniques are used to rationalise changes in device performance following encapsulation. Macrocyclic molecules are also explored as a method to control packing and we apply this to the acceptor component of the active layer. The …
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Fluorescence imaging microscopy studies on single molecule diffusion and photophysical dynamics
… fluorescence studies allow to access the photophysical dynamics of genetically encoded fluorescent proteins itself. However, in order to gain statistically consistent results, e.g. on the mobility behavior or the photophysical properties, the fluorescence image sequences have to be …
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Theoretical Investigations of the Photophysical Properties of Chromophoric Metal-Organic Frameworks
… has highlighted the potential to improve the photophysical properties of PP-based SURMOFs by (i) introducing various functional groups or metal ions to the PP-core and (ii) controlling the PP-stacking behavior in layered materials. To overcome the posed shortcomings of the PP-MOF prototype PV …
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Syntheses and Photophysical Studies of Two-Dimensional Hybrid Organic-Inorganic Semiconductors
This thesis focuses on the studies of two families of two-dimensional (2D) hybrid organic-inorganic semiconductors with exciting properties for optoelectronic applications. The first family is 2D lead halide perovskites (LHPs), which have received immense interest due to their solution …
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Photophysical properties of pyrene, 2,7 diazapyrene and 1,3-bis(β-naphthyl)propane.
The luminescence properties of Van Der Waals' dimers and clusters of pyrene and diazapyrene have been investigated. Excimers, dimeric species which are associative in an excited electronic state and dissociative in their ground state, have long been established and play an important role in many …
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Single-Molecule Characterization of Photophysical and Colloidal Properties of Biocompatible Quantum Dots
… times, multicolor and time-gated detection. Photophysical properties were investigated at the ensemble and single-molecule level for CdSe or CdTe core, CdSe/ZnS core-shell and surface-modified NCs. The use of NCs as fluorescent probes in biological applications requires various synthesis …
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Photophysical Studies of Beta Phase Formation in Poly(9,9-di-n-alkylfluorenes)
The photophysical changes that take place in Poly(9,9-di-n-alkylfluorenes) upon formation of the beta phase in methylcyclohexane solution are observed by optical spectroscopy. The equilibrium absorption spectra as a function of temperature show that conformational changes occur for all five …
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