Interaction of mixed-donor macrocycles containing the 1,10-phenanthroline subunit with selected transition and post-transition metal ions: metal ion recognition in competitive liquid-liquid solvent extraction of Cu(II), Zn(II), Pb(II), Cd(II), Ag(I), and Hg(II)

Inorganic Chemistry
M Carla AragoniMarco Wenzel

Abstract

Two new mixed aza-thia crowns 5-aza-2,8-dithia[9]-(2,9)-1,10-phenanthrolinophane (L(4)) and 2,8-diaza-5-thia[9]-(2,9)-1,10-phenanthrolinophane (L(7)) have been synthesized and characterized. The coordination behavior of L(4) and L(7) toward the metal ions Cu(II), Zn(II), Pb(II), Cd(II), Hg(II), and Ag(I) was studied in aqueous solution by potentiometric methods, in CD3CN/D2O 4:1 (v/v) by (1)H NMR titrations and in the solid state. The data obtained were compared with those available for the coordination behavior toward the same metal ions of structurally analogous mixed donor macrocyclic ligands L(1)-L(3), L(5), L(6): all these contain a phenanthroline subunit but have only S/O/N(aromatic) donor groups in the remaining portion of the ring and are, therefore, less water-soluble than L(4) and L(7). The complexes [Cd(NO3)2(L(5))], [Pb(L(7))](ClO4)2 x 1/2MeCN, [Pb(L(4))](ClO4)2 x MeCN, and [Cu(L(7))](ClO4)2 x 3/2MeNO2 were characterized by X-ray crystallography. The efficacy of L(1)-L(7) in competitive liquid-liquid metal ion extraction of Cu(II), Zn(II), Cd(II), Pb(II), Ag(I), and Hg(II) was assessed. In the absence of Hg(II), a clear extraction selectivity for Ag(I) was observed in all systems investigated.

References

Oct 30, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Alexander J BlakeClaire Wilson
Dec 18, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Vesna GasperovAllan H White
Nov 2, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Ioana M VasilescuGang Wei

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Citations

Mar 31, 2015·Journal of Molecular Modeling·Rafael R do NascimentoHelena M Petrilli
Feb 13, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Andrea MelchiorMarilena Tolazzi
Aug 9, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Daniel PellicoMiguel A Sierra
May 1, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sze-Wing NgChun-Yuen Wong

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