Characterization of quinoxolinol salen ligands as selective ligands for chemosensors for uranium

II Michael A DeVore, Spencer A Kerns, Anne Gorden

Research output: Contribution to journalArticlepeer-review

Abstract

Quinoxalinol salen ligands have been characterized as selective ligands for the rapid identification of uranyl. The absorption maximum of ligand 1 presented a hypsochromic (blue) shift with the addition of UO22+ (as the acetate salt), and a bathochromic (red) shift in the presence of Cu2+ or Co2+ acetate salts, resulting in distinct, visible color changes for all three metal ions. The absorption maximum of ligand 2 was not observed to change with the addition of UO22+; however, it does present a bathochromic shift with the addition of Cu2+, and a hypsochromic shift with Co2+ added. Using TDDFT calculations, it was demonstrated that the hypsochromic shift for UO22+ ion complexation with ligand 1 is caused by a ligand‐to‐metal charge transfer, while the bathochromic shift observed with Cu2+ ion addition was caused by a metal‐to‐ligand charge trans
Original languageEnglish
Pages (from-to)5708--5714
JournalEuropean Journal of Inorganic Chemistry
DOIs
StatePublished - 2015

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