Exploring the interaction of mercury(II) by N2S2 and NS3 anthracene-containing macrocyclic ligands: Photophysical, analytical, and structural studies

Abel Tamayo, Bruno Pedras, Carlos Lodeiro, Lluis Escriche, Jaume Casabó, José Luis Capelo, Berta Covelo, Raikko Kivekäs, Reijo Sillanpää

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49 Citations (Scopus)


The complexation properties toward Hg(II) of six macrocyclic ligands, 3,11-dithia-7,17-diazabicyclo[11.3.1]heptadeca-1(17),13,15-triene (L1), 7-(9-anthracenylmethyl)-3,11-dithia-7,17-diazabicyclo[11.3.1]heptadeca-1(17),13, 15-triene (L2), 7-(10-methyl-9-anthracenylmethyl)-3,11-dithia-7,17- diazabicyclo[11.3.1]heptadeca-1(17),13,15-triene (L3), 7,7′-[9,10- anthracenediylbis(methylene)]bis-3,11-dithia-7,17-diazabicyclo[11.3.1] heptadeca-1(17),13,15-triene (L4), 1,4,7-trithia-11-azacyclotetradecane (L5), and 11,-(anthracen-9-ylmethyl)-1,4,7-trithia-11-azacyclotetradecane (L6), were studied. The stoichiometries of the formed species were determined from absorption and fluorescence titrations. In these anthracene-containing macrocycles, a fluorescent quenching of the emission was found upon Hg(II) addition. The X-ray crystal structure of [HgCl2(L2)]·1/ 2CH2Cl2 was determined. The asymmetric unit contains two independent [HgCl2(L2)] molecules and one dichloromethane molecule. Each Hg(II) ion is coordinated by the pyridine nitrogen, the two sulfur atoms of one L2 molecule, and two chloride ions. Analytical studies using solvent extraction separation of Hg(II) from aqueous solutions were performed to determine the Hg(II) extraction capability of ligands L1, L2, and L5. © 2007 American Chemical Society.
Original languageEnglish
Pages (from-to)7818-7826
JournalInorganic Chemistry
Issue number19
Publication statusPublished - 17 Sep 2007


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