Dual carbonate sensor based on Eu(III) complex of DO3A ligand
| Authors | |
|---|---|
| Year of publication | 2016 |
| Type | Article in Periodical |
| Magazine / Source | Monatshefte für Chemie - Chemical Monthly |
| MU Faculty or unit | |
| Citation | |
| Web | http://dx.doi.org/10.1007/s00706-016-1722-x |
| Doi | http://dx.doi.org/10.1007/s00706-016-1722-x |
| Field | Analytic chemistry |
| Keywords | luminiscence probe; electrochemical probe; carbonate; Eu(III) complexes; macrocyclic ligands |
| Description | Eu(III) ternary complexes with 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid (H(3)DO3A) and picolinate-like "antenna" ligands ([Eu(DO3A)(L)](-)) react with carbonate anion to form more stable [Eu(DO3A)(CO3)](2-) complexes which are non-fluorescent. Furthermore, [Eu(DO3A)(L)](-) and [Eu(DO3A)(CO3)](2-) differ in their electrochemical behavior. [Eu(DO3A)(L)](-) are therefore suggested as sensitive luminescence-based and also electrochemical sensors of carbonate anion. Both luminescence and voltammetric sensing strategies show similar analytical figures of merit (limit of detection 0.2 mM, dynamic range 0.2-1.6 mM). The voltammetric procedure was successfully tested in field conditions for the quantitative analysis of bicarbonate/carbonate in environmental water samples, utilizing portable potentiostat and screen-printed electrode. |
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