Speciation studies in aqueous solution on the interaction Of Cu2+ and Zn2+ with a series of polyaminic ligands N-naphthalen-1-ylmethyl-N'-[2-[(naphthalen-1-ylmethyl)- amino]-ethyl)-ethane-l,2-diamine (LI), N-naphthalen-lylmethyl-iV-(2-{2-[(naphthalen-1-ylmethyl)-amino]-ethyl- amino]-ethyl)-ethane-l,2-diamine (L2) and N-naphthalen-1-ylmethyl-N'-[2-(2-{2-[(naphthalen-1-ylmethyl)-amino]- ethylamino)-ethylamino)-ethyl]-ethane-1,2-diamine (L3) containing two naphthylmethyl groups at their termini and N-1-(2-{2-[(naphthalen-1-ylmethyl)-amino]-ethyl-amino)-ethyl)-ethane-1,2-diamine (L4) containing just one naphthylmethyl group have been carried out at 298.1 K in 0.15 mol dm (-3) NaCl. In the case of the tetraamines L2 and L4, their coordination capabilities towards Cd2+, Ni2+, Co2+ and Pb2+ have also been considered. The stability constants follow the general Irving-Williams sequence. The steady-state fluorescence emission studies on the interaction with metal ions show that while Cu2+ produces a chelation enhancement of the quenching (CHEQ), the interaction with Zn2+ leads to a chelation enhancement of the fluorescence (CHEF). Finally, ligands L1, L2 and L3 have been successfully covalently attached to silica surfaces and some preliminary results of their emissive properties are given.
ISI Document Delivery No.: 885EGTimes Cited: 5
Cited Reference Count: 45
Alarcon, J Aucejo, R Albelda, MT Alves, S Clares, MP Garcia-Espana, E Lodeiro, C Marchin, KL Parola, AJ Pina, F De Melo, JS Soriano, C
Seixas de Melo, Sergio/A-5388-2008; Pina, Fernando/C-8161-2011; Albelda, M. Teresa/J-5929-2012; Lodeiro, Carlos/B-4793-2013; Parola, A. Jorge/F-4048-2010; REQUIMTE, AL/H-9106-2013
Seixas de Melo, Sergio/0000-0001-9708-5079; Lodeiro, Carlos/0000-0001-5582-5446; Parola, A. Jorge/0000-0002-1333-9076;
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