TY - JOUR
T1 - Exploring the interaction of mercury(II) by N2S2 and NS3 anthracene-containing macrocyclic ligands: Photophysical, analytical, and structural studies
AU - Tamayo, Abel
AU - Pedras, Bruno
AU - Lodeiro, Carlos
AU - Escriche, Lluis
AU - Casabó, Jaume
AU - Capelo, José Luis
AU - Covelo, Berta
AU - Kivekäs, Raikko
AU - Sillanpää, Reijo
PY - 2007/9/17
Y1 - 2007/9/17
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=34948859440&partnerID=8YFLogxK
U2 - 10.1021/ic700489e
DO - 10.1021/ic700489e
M3 - Article
C2 - 17696422
AN - SCOPUS:34948859440
SN - 0020-1669
VL - 46
SP - 7818
EP - 7826
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 19
ER -