Isoamethyrin analogues and cyclo[n]pyrrole as sensors for cations and anions

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Title: Isoamethyrin analogues and cyclo[n]pyrrole as sensors for cations and anions
Author: Melfi, Patricia Jennifer, 1979-
Abstract: The increased worldwide interest in nuclear power and the politically charged threat of nuclear weapons release has made understanding the components , as well as the waste , of nuclear energy an important area of research . More specifically , the identification and selective extraction of the dioxoactinide cations uranyl (UO₂²⁺ ) and plutonyl (PuO₂⁺ ) , low valent actinides scuh as Am³⁺ or Cm³⁺ and various anions , such as pertechnetate (TcO₄⁻ ) , is essential in the event of a weapons release or the spill of nuclear waste . It has been previously demonstrated that the expanded porphyrin [24]hexaphyrin (1 .0 .1 .0 .0 .0 ) , commonly referred to as isoamethyrin , displays a dramatic color change , from golden yellow to red , upon coordination of uranyl , neptunyl and plutonyl cations . Chapter 2 details quantitative investigations of isoamethyrin with the uranyl cation as well as the interactions of isoamethyrin with other , potentially competing , cations . This work was carried out in order to assess the ability of isoamethyrin to serve as a colorimetric sensor for the actinide cations . Chapter 3 describes the synthesis and properties of periphery -modified isoamethyrin analogues . The addition of functional groups to this expanded porphyrin allows for immobilization onto a solid support and may enhance its utility as a sensor . Chapter 4 presents the preliminary investigations into the metalation and anion binding properties of a new series of macrocycles , the cyclo[n]pyrroles . Chapter 5 provides experimental methods and characterization data .
URI: http : / /hdl .handle .net /2152 /3157
Date: 2008-08-28

Citation

Isoamethyrin analogues and cyclo[n]pyrrole as sensors for cations and anions. Doctoral dissertation, The University of Texas at Austin. Available electronically from http : / /hdl .handle .net /2152 /3157 .

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