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Showing 1 to 20 of 25 for “"Calix[4]arene"”.
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Heterocyclic Calix[4]arene Derivatives for Fluorescence Investigations
… of a family of novel Schiff base capped calix[4]arenes. These ligands were prepared using three 1,3 bis-bromo-alkyl-disubstituted calix[4]arenes (ethyl, propyl and butyl), and ortho, meta and para substituted di-imine bridged diphenol units. All these reactions yielded the desired product …
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Self-Assembly of Calix[4]Arene Amine Derivatives
A new family of calix[4]arene amine derivatives, which have been functionalised on both the upper and lower rim have been developed as potential duel metal ion binding complexes, and all were fully characterised. The lower rim was first functionalised with various groups such as benzyls and …
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Synthesis and chemosensing ability of novel pyrene-isoxazole-calix[4]arene constructs
… functioning as linker and ion-binding moiety and calixarene scaffold as ion-binding moiety - PIC.
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Synthesis of Novel Calix[4]arene Based Dendrimers and their Biological Applications
… describes the development and synthesis of multicalixarenes and their application in gene and drug delivery. Chapter 1 provides an introduction to gene therapy and calixarenes. The synthesis of two families of amino functionalised multicalixarenes are described. Evaluation of their toxicity and …
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Structure Activity Study of a Family of Functional Pyrene-Isoxazole-Calix[4]arene Fluorescent Chemosensors for Metal Ion Detection
… a novel family of pyrene-isoxazole-calix[4]arenes. Aninvestigation of their metal cation sensing abilitiesusing techniques including absorbance, fluorescence and 1H NMR spectroscopiesfollows.The novel work begins by developing apyrene-isoxazole appended calix[4]arene,PIC thatcould …
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Calix[4]arene : kontrollierte Funktionalisierungen in para- und meta-Position, Bildung von kovalenten Kapseln und Entwicklung eines neuen Fluoridionen-Rezeptors
… habe ich meine Beiträge zur Erforschung von Calix[4]arenen auf verschiedenen Gebieten dargelegt. Das erste Kapitel bietet eine statistische Analyse von 113 Artikeln aus dem Jahr 2006 mit dem Ziel, allgemeine Charakteristika der Chemie von Calix[4]arenen fundiert zu erfassen. Das Kapitel 2 …
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SYNTHESIS AND CHARACTERIATION OF WATER SOLUBLE C2 AND C3 SYMMETRIC MULTI-CALIX[4]ARENE DENDRIMERS AND PILLARARENES A NOVEL CLASS OF MACROCYCLE IN SUPRAMOLECULAR CHEMISTRY
… hetero-component, through the use of pillararenes and calixarenes coupled to porphyrins; in particular it was designed to the preparation of discrete assembled at the nanoscopic level, by means of hierarchical 'self-assembly' of organized systems governed by electrostatic interactions and …
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Polymers containing calix[4]arenes and triptycenes : new syntheses, properties and applications
… polymers with complex molecular structures. Calix[4]arenes and triptycenes are the two major molecular building blocks for constructing the functional polymers. Unusual properties, with the emphasis on mechanical and sensory properties, are demonstrated. In Chapter 2, early investigations on …
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The synthesis and sensing capabilities of new amide, urea and nitrile calix4arenes
… chemistry of new structures based on neutral calix[4]arene supramolecular platforms is investigated. Hosts are substituted to varying degrees with functionalised appendages to form cavities for selectively complexing guests. Functional groups include ureas, amides and nitriles, targeting …
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Investigations into the Synthesis of InherentlyChiral Calix[4]arenes
The design and synthesis of highly functionalised calix[4]arenes are of great interest for research. The modification of the upper-rim of calix[4]arene allows the lower-rim to act as a potential molecular binding site. Our objective is to develop methodologies and synthetic routes that allow us to …
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New sensor applications of poly(phenylene ethynylene)s
… specific host-guest interactions involving the calix[4]arene macrocycles.
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Calix[4]pyrrole-based ion pair receptors
… efforts to develop such systems on the basis of calix[4]arenes and calix[4]pyrroles. Calix[4]pyrroles and calix[4]arene derivatives bearing crown ethers or ester groups are known to act as efficient receptors for anions and cations, respectively. Therefore, the synthetic combination or …
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Synthesis of Tin Containing Calix[4]arenes and their Anion Binding Capabilities
… research has been done on the ability of calixarenes to complex cations and neutral species. The electron-rich molecular cavity and lower rim consisting of a cyclic array of oxygen donors makes the structure of the calixarene conducive to this type of complexation. Conversely, the …
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Investigation of artificial malonyl group carriers and multifunctional cyclic scaffolds towards the mimicry of PKS
… method to obtain monofunctionalised calix[4]arenes blocked in a cone conformation is described. A broad range of monoarmed calix[4]arenes have been synthesised and the properties of some of these calix[4]arenes studied. In addition, a simple method for the preparation of multi …
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Explorations with Polycarbocyclic Cage Compounds
… properties. Novel pyridyl containing calix[4]arene receptors were prepared. Analysis of their respective 1H NMR and 13C NMR spectra suggests that calix[4]arene moieties in the ligand occupy the cone conformation. The complexation properties of these host molecules were estimated by …
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Novel Schiff-base and Benzamide N,O-Donor Ligands for Development as Fluorionophores and Selective Metal Ion Binders
… derivatives, using a tetra tert-butylcalix[4]arene difunctionalised at the lower rim as a molecular scaffold. X-ray crystal structures for these calix[4]arene derivatives were obtained in four cases. Zn(II) complexes of this family of compounds were prepared in several cases. Both the …
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Use of multiple functionalised ligand sets in metalorganic framework formation: synthesis, characterisation and gas uptake studies
… and desorption. Lower-rim acid functionalised calix[4]arene structures (14, 15) were prepared by the reaction of 25,27-bis(methoxycarboxylic acid)-26,28-dihydroxycalix[4]arene (L2H2) coordination polymers with Li2CO3 and tert-butyllithium respectively, with the solvothermal reaction of L2H2 …
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The Development of Ionophore-Selective Based optical chemical sensors for the determination of heavy metal ions in aqueous environments
… Cu2+. A novel series of double armed spirocyclic calix[4]arene compounds has been investigated for their binding abilities with heavy metal ions. Compound 2-144 showed a good selectivity of Pb2+ over other heavy metal ions. This compound has a potential for the use as selective-ionophore for the …
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Photoresponsive nanosystems for therapeutic applications
… 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 containing a nitric oxide …
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Design and synthesis of molecular actuators and sensors
… contracting and expanding. We proposed earlier a calix[4]arenebased molecular actuator for the contracting mechanism, in which p-dimer formation was proposed as a driving force. In this dissertation, we first confirm by model studies that p-dimer formation can indeed be a driving force for the …
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