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 23 for “"Chemosensor"”.
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Glass Foundation Chemosensor Synthesis and Functionality Analysis
<p>Chemosensors are created through a series of reaction steps on controlled pore class (CPG) and terminate with a Cu<sup>2+</sup> metal binding site. Each monolayer of reactant insures that the metal binding site exposed to solution would serve as an indicator displacement assay (IDA) sensor. The …
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Synthesis, design and characterization of a distributed feedback grating based non-linear optical chemosensor
Current optical chemosensors that operate by a 3R sensing approach - recognize, relay and report -- generate a measurable luminescent signal in the presence of targeted analyte. However, the advancement of chemical sensing into the micro- and nanoscale regimes necessitates the development of new …
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Synthesis and chemosensing ability of novel pyrene-isoxazole-calix[4]arene constructs
… describes the preparation and analysis of a new chemosensor built up of the following elements: a pyrene reporter unit, an isoxazole unit functioning as linker and ion-binding moiety and calixarene scaffold as ion-binding moiety - PIC.
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The Development of Assays for Detecting Proximal Phosphorylation and Covalent Modification of Proteins
… a previously discovered fluorescent excimer chemosensor was characterized and next generation chemosensor libraries were designed and synthesized. Chemosensors were used for proximal phosphate detection in numerous biologically-relevant applications with a variety of assay types including …
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Surface modification of electrospun poly(vinylidene fluoride) nanofibrous microfiltration membrane
… engineering, drug delivery carrier, biosensor/chemosensor, reinforced nanocomposite and electronic and semi-conductive materials. However their use in liquid separation is still at infancy. The main focus of the thesis would be to develop a high flux asymmetric microfiltration electrospun …
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Chemosensing strategies : utilizing the novel sulfonamidohydroxyquinoline amino acid Sox
Modular peptide-based fluorescent chemosensors utilizing the chelation-sensitive fluorophore 8-hydroxy-5-(N,N-dimethylsulfonamido)-2-methylquinoline are powerful tools for sensing Zn²⁺ and for sensing protein kinase activity. This signaling component is prepared as the protected amino acid …
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Design and Frabication of Optical Li+ Sensors for Application in Li-ion Batteries
… to form highly selective and sensitive optical chemosensors. Subsequently, the design, synthesis, and characterisation of two novel Li+-selective fluorescent chemosensors based on a naphthalene diimide core are described. Although both displayed poor solubility in salt-solvent systems reflective …
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Xanthene/Benzoxanthene Dyes: Novel Synthetic Metholologies, Applications in Molecular Recognition, Cellular Imaging and the Design of a Tunable White (RGB) Light Emitter
… in the visible region using a boronic acid based chemosensor. The technique shows great promise for the detection of sialic acid, a critical cell surface residue involved in cancer, graft rejection and virulence in certain bacteria. There is no interference from commonly occurring …
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Die Rolle der Umamirezeptoruntereinheit Tas1r1 jenseits ihrer gustatorischen Bedeutung
… ihrer Aufnahme und ihrer Verwertung. Welcher Chemosensor für diese Erkennung jedoch hauptverantwortlich ist, ist bisher unklar. In der vorliegenden Arbeit wurde die Rolle der Umamigeschmacksrezeptoruntereinheit Tas1r1 jenseits ihrer gustatorischen Bedeutung für die Aminosäuredetektion in der …
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Heterocyclic Calix[4]arene Derivatives for Fluorescence Investigations
… was probed with a view to use as a fluorescent chemosensor. However, it was determined that this class of compounds was unsuitable for this role. The synthesis of a range of triazole linked Schiff base capped calix[4]arenes was attempted, but it was discovered the imine moiety was incompatible …
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Towards Responsive Squaramides: Anion Recognition, Sensing, and Transport
… and application of a squaramide based chemosensor. A small family of squaramidoquinoxalines were synthesised via a one-step synthesis. X-ray crystallographic analysis demonstrated the tendency of the squaramidoquinoxalines to participate in a number of intermolecular interactions and …
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Neutral receptors for anion recognition: synthesis, selectivity studies and transport properties
… DMSO-d6/5% H2O) which also acts as fluorimetric chemosensor, even at naked eye, for this anion. Theoretical calculations helped us to explain the binding properties observed. A series of bis-ureidic receptor L9-L14 (Figure 3) was prepared and the studies of their transmembrane anion transport …
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Lanthanide complexes as fluorescent indicators for neutral sugars and cancer biomarkers
Simple water soluble lanthanum and europium complexes are effective at detecting neutral sugars as well as glyco- and phospholipids. In solutions at physiologically relevant pH the fluorescent lanthanum complex binds neutral sugars with apparent binding constants comparable to those of arylboronic …
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Investigation of Chitosan-based Adsorbents for Water Treatment, Pollutant Detection, and Adsorption Mechanism
… adsorbent was also used as a turn-off chemosensor for detection of Cu (II) with low limit of detection (LOD) in aqueous solutions using fluorescence spectroscopy. This research is the first example of a study for a tweezer-like biopolymer material with dual functionality as an adsorbent …
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SYNTHESIS OF CHROMO FLUOROGENIC SENSORS FOR MOLECULAR RECOGNITION
… cytotoxicity) in order to obtain a water soluble chemosensor; also this work is in partnership with another research group and the first results are promising. We also studied the possibilities of selectively transfer oxygen onto a specific substrate for instance unfunctionalized alkenes by using …
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Polymer and covalent functionalization of single walled carbon nanotubes for electronic sensor applications
… Nanowires (NWs) are a major theme in chemosensor development. High surface area, inter-wire junctions, and restricted conduction pathways give intrinsically high sensitivity and new mechanisms to transduce binding or action of analytes. This chapter details the status of NW …
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The synthesis and investigation of alizan-based functional chromogenic probes for heavy mental sensing in aqueous medium
Heavy metal contamination of drinking water is a global concern. Conventional analytical techniques that are commonly used for metal ion detection in water, such as atomic absorption spectrometry and mass spectrometry, are not suitable for mass monitoring purposes. Suitable chromogenic probes could …
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Multifunktionsfeldeffekttransistoren zur Strömungs-, Chemo- und Biosensorik in Lab on a Chip-Systemen
… von Flüssigkeitsbewegungen und zugleich als Chemosensor eingesetzt werden. Es wurde also nicht nur ein neuartiges, äußerst robustes, chemikalienbeständiges und biokompatibles Multifunktionssensorelement mit Abmessungen im Mikrometer- bis Millimeterbereich entwickelt, sondern auch eine neue …
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Design and synthesis of organic chromophores for imaging, lithography and organic electronics
… electronic devices. In Chapter 1, a fluorogenic chemosensor to detect saturated nitramine and nitrate ester explosives was devised based on a photochemical reduction reaction. 10-Methyl-9,10- dihydroacridine (AcrH2) was found to transfer a hydride ion equivalent to the high explosives RDX and …
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Sensing in biological systems
… a significant effect on cell health. Fluorescent chemosensors, in combination with specialised imaging technologies, provide a useful tool to study the role of metal ions in cellular processes as they enable detection in and around cells with spatial and temporal resolution. Commercially available …
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