Bis(2-pyridylmethyl)alkyl(thioalkyl)diamines as promising scaffolds for the construction of fluorescent and redox chemosensors for transition and post-transition metal ions

Riccardo Montis, M. Carla Aragoni, Massimiliano Arca, Carla Bazzicalupi, Alexander J. Blake, Claudia Caltagirone, Greta De Filippo, Alessandra Garau, Paola Gratteri, Francesco Isaia, Vito Lippolis, Anna Pintus

    Research output: Contribution to journalArticlepeer-review

    Abstract

    N,N′-Bis(2-pyridylmethyl)propylendiamine (1) and N,N′-bis(2- pyridylmethyl)-1,5-diamino-3-thiapentane (2) have been functionalised at the secondary nitrogen atoms with dansylamidoethyl (L 1, L 3), 2-quinolinylmethyl (L 2, L 4) and ferrocenylmethyl (L 6, L 7) pendant arms with the intention to study their potentiality as receptor units in molecular sensors. The optical response of L 1-L 4 to the presence of the metal ions Cu 2+, Zn 2+, Cd 2+, Hg 2+ and Pb 2+ has been investigated in MeCN/H 2O (4:1 v/v) solution. The electrochemical response of L 6 and L 7 to the presence of the same metal ions has been investigated in anhydrous MeCN/CH 2Cl 2 10:1 (v/v) solution. Results are compared and discussed with the aim to clarify the mutual role played by the bis(2-methylpyridyl)alkyl(thioalkyl)diamines and the signalling units attached to them in reaching the selectivity of the responses observed.

    Original languageEnglish
    Pages (from-to)170-180
    Number of pages11
    JournalInorganica Chimica Acta
    Volume381
    Issue number1
    DOIs
    Publication statusPublished - 15 Feb 2012

    Keywords

    • Aminopyridine ligands
    • Cadmium
    • Dansyl
    • Fluorescent chemosensors
    • Quinoline
    • Zinc

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