Hexaphyrin(1.0.1.0.0.0). A new colorimetric actinide sensor |
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| Authors: | Jonathan L Sessler Patricia J Melfi Anne EV Gorden Doris K Ford C Drew Tait |
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| Institution: | a Department of Chemistry and Biochemistry, Institute for Cellular and Molecular Biology, 1 University Station A5300, The University of Texas at Austin, Austin, TX 78712-0165, USA
b C—Chemistry and NMT—Nuclear Materials Technology Divisions, Los Alamos National Laboratory, Los Alamos, NM 87545, USA |
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| Abstract: | Hexaphyrin(1.0.1.0.0.0) (isoamethyrin) undergoes a significant color change in the presence of UO22+, PuO22+, and NpO22+. The complexation of the first of these dioxo actinide cations was studied in semi-quantitative fashion in 1:1 MeOH-CH2Cl2. Under these conditions, the detection limit for UO22+ was found to be ca. 5.8 ppm by naked eye monitoring and <28 ppb by UV-vis spectroscopy. Isoamethyrin does not undergo a color change in the presence of most transition metals or when exposed to Gd(III). Isoamethyrin thus constitutes an attractive alternative to 2,2′(1,8-dihydroxy-3,6-disulfonaphthylene-2,7-bisazo)-bisbenzenarsonic acid (AzIII) and 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol (BrPADAP), systems currently used as actinide cation sensors. |
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| Keywords: | Expanded porphyrins Isoamethyrin Uranium Colorimetric sensor |
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