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 18 of 18 for “"photoresponsive"”.
-
Thiophene-based photoresponsive mesogens
… 'azophenols', for potential use in photoresponsive applications. For comparative purposes, the non-heterocyclic cinnamate counterparts (Series III) were also prepared and are reported. All one hundred and thirty final esters are mesomorphic, exhibiting the nematic phase alone. The …
-
Photoresponsive nanosystems for therapeutic applications
… dissertation focuses on the achievement of novel photoresponsive calix[4]arene-based nanoconstructs which vehicle, by not covalent or covalent approach, different kinds of chromophores. The second part concerns the design, synthesis, antitumoral and antibacterial activity of polymersomes …
-
Optically active photoresponsive multifunctional polymeric materials
… of photochromic materials (photorefractivity, photoresponsiveness, NLO properties). The first part of this research was to synthesize analogue homopolymers and copolymers based on bisazoaromatic moiety and compare their properties to those of the above mentioned analogue derivatives bearing …
-
A new class of photoresponsive surfactants
In this thesis, a new class of nonionic, photoresponsive surfactants consisting of a polar di(ethylene oxide) head group attached to an alkyl spacer of between two and eight methylene groups, coupled through an ether linkage to an azobenzene moiety, were synthesized and developed. Structural …
-
Dynamics in a photoresponsive surfactant system
… properties in a targeted area. A nonionic photoresponsive surfactant has been developed which incorporates the light-sensitive azobenzene group into its hydrophobic tail. Cis-trans photo-isomerization of this group causes a change in the structure of the surfactant molecule which alters its …
-
Synthesis and Characterisation of Photoresponsive Azobenzene-Biomolecule Conjugates
This thesis begins by overviewing the literature around the design, synthesis and application of molecular switches with a focus on the field of azobenzene switches, their isomerisation mechanisms and their value as control units on biological molecules. The introductory chapter is followed three …
-
Developing photoresponsive lipid nanoparticles for the triggered release of small molecules
This thesis will examine numerous photo responsive drug delivery nanoparticles containing two different first-generation (1G) donor-acceptor Stenhouse adduct (DASA) molecules, DOPC, DLPC, cholesterol and lauric acid. The DASA isomerizes upon visible light irradiation, thereby increasing membrane …
-
Photoresolvable compounds: Towards a chiroptical-liquid crystalline switch
… site in a volume has motivated research in photoresponsive compounds. An interesting family of photoresponsive compounds are those that are sensitive to the sense of chirality of light. Compounds capable of photoresolution can be switched between a scalemic and a racemic state, this can be …
-
Responsive molecules: 1. Redox-responsive quadruple hydrogen bonding unit 2. Crosslinked dendronized polyols for brighter and more stable dyes 3. Photoresponsive proton gate for cross-membrane transfer
… In Chapter 4, we designed the first synthetic photoresponsive proton gate incorporated in a lipid layer. The new proton carrier features a boronic acid head-group for proton transfer, a stiff stilbene body for photoresponsiveness, and an alkyl tail for lipid incorporation. The light-induced …
-
Quantifying the stimuli of photorheological fluids
… of photorheological fluids and, more generally, photoresponsive fluids for monochromatic and polychromatic light sources. Derived from first principles, the model relates the irradiance of light source to the evolution of the concentration of a photoactive species within a sample. We show that …
-
Synthesis and evaluation of quadruple hydrogen-bonding modules for smart materials applications
… to an unmodified system. Progress toward a photoresponsive bisureidonaphthyridine H-bonding unit is disclosed in chapter 5. The photoresponsive naphthyridine is designed to allow reversible, light-driven modulation of the binding between the naphthyridine and DeUG. Synthetic results are …
-
Design and applications of 4-yl-(methyl)coumarins and their derivatives
… to probe chemical greyscaling by combining the photoresponsive coumarin monolayer with novel greyscale photolithography masks. The versatility of the coumarin photofuse was demonstrated through simple modifications of the coumarin core to provide access to characterization techniques such as …
-
Site-Specific Labelling of Nucleic Acids by Catalyst-Free 1,3-Dipolar Cycloadditions
… instrument controlled solid phase DNA synthesis. Photoresponsive DNA, incorporating isomeric isoxazole-linked azobenzene moieties, was prepared by ‘post-synthetic’ modification of alkyne-functionalised oligonucleotides by NOAC. The compatibility of the azobenzene functionality with NOAC protocols …
-
Synthesis and application of biomaterials containing the 1,3,5-triazaadamantane moiety or functionalized alginate
… and without the production of by-products. Photoresponsive gels have also been made that degrade upon exposure to light. This material can be patterned and post functionalized to display desired chemical cues.
-
Design and Materials Applications of Quadruply Hydrogen Bonding Modules
… 3 details the development and application of a photoresponsive DAN (pDAN). Through covalent incorporation of anthracene moieties, which are capable of reversible, photochemical dimerization, into DAN, it is possible to modulate the DeUG·DAN binding event. This, in turn, allowed for the …
-
The reproductive biology of two small southern African mammals, the spiny mouse, Acomys spinosissimus (Rodentia: Muridae) and the Eastern rock elephant-shrew, Elephantulus myurus (Macroscelidea: Macroscelididae)
… seasonality of reproduction and the reproductive photoresponsiveness of two southern hemisphere species, the spiny mouse (Acomys spinosissimus) and the Eastern rock elephant-shrew (Elephantulus myurus) from South Africa. Furthermore, it compared hypothalamic kisspeptin expression in males and …
-
Supramolecular Approaches to Viscoelastic Biomaterials and Their Applications
Viscoelasticity encompasses the characteristics of both the shape-conserving elasticity and the shock-absorbing viscosity. The extracellular matrices (ECM), or the protein-polymer scaffolds surrounding the cells in our body, possess unique tissue-dependent viscoelasticity to protect and provide …