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The synthesis and sensing capabilities of new amide, urea and nitrile calix4arenes

Schazmann, Benjamin (2006) The synthesis and sensing capabilities of new amide, urea and nitrile calix4arenes. PhD thesis, Dublin City University.

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Abstract

The synthesis and host-guest 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 cations and anions as guest species. The main methods used for transducing complexation events are potentiometry and fluorescence. The various hosts and guests investigated attempt to reflect the versatility and ongoing evolution of state-of- the-art calixarene chemistry within the field of supramolecular chemistry. Throughout the thesis there is particular emphasis on relating host structural changes to changing analytical signal upon complexation with a particular guest. This is the link between the sensing signal and chemistry at a molecular level, the heart of every chemical sensor. The main achievements of this work are a) the development of a urea based chloride selective host with ratiometric fluorescence transduction using pyrenes, b) nitrile based mercury(I1) and silver(1) selective hosts using potentiometric transduction, c) the investigation of an amide-calix[4]arene bromide selective host based on potentiometric transduction, d) the developmet of urea-calix[4]arene ionophores showing potential for improved electrochemical aqueous nitrate sensing and e) a contribution to supramolecular synthesis techniques is made by way of a new semi-preparative liquid chromatographic method for the efficient isolation of pure target compounds.

Item Type:Thesis (PhD)
Date of Award:2006
Refereed:No
Supervisor(s):Diamond, Dermot
Uncontrolled Keywords:calixarene chemistry; supramolecular chemistry; calixarenes
Subjects:Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 License. View License
ID Code:16940
Deposited On:04 May 2012 11:01 by Fran Callaghan. Last Modified 04 May 2012 11:01

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