TY - JOUR
T1 - Hg2+ detection by new anthracene pendant-arm derivatives of mixed N/S- and N/S/O-donor macrocycles: Fluorescence, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and density functional theory studies
AU - Mameli, Marta
AU - Lippolis, Vito
AU - Caltagirone, Claudia
AU - Capelo, José Luis
AU - Faza, Olalla Nieto
AU - Lodeiro, Carlos
N1 - We are indebted to InOU Uvigo through Project K914 122P 64702 (Spain) and FCT-Portugal through Project POCl/QUI/55519/2004 for financial support. J.L.C. and C.L. thank INCITE-Xunta de Galicia, Spain, for the Isidro Parga Pondal Research Program. V. L., C.C., and M.M. thank Minister dell'Istruzione, dell'Universita e della Ricerca, for financial support (Project PRIN 2007-C8RW53).
PY - 2010/9/20
Y1 - 2010/9/20
N2 - The optical response of four new anthracenylmethyl pendant-arm derivatives (L1-L4) of the macrocyclic ligands [12]aneNS3, [12]aneNS 2O, [15]aneNS2O2, and [12]aneN2SO toward the metal ions Zn2+, Cd2+, Pb2+, Cu 2+, Hg2+, Ag+, Fe2+, Co 2+, Ni2+, Mn2+, Ca2+, Na +, Mg2+, and K+ was investigated in 1:1 (v/v) MeCN/H2O solutions. A strong chelation enhancement of quenching effect was observed on the fluorescent emission intensity of L2 as a consequence of the host-guest interaction with Hg2+ and the formation of a 1:2 metal-to-ligand complex. Density functional theory calculations confirmed the formation of a sandwich-type complex between L2 and Hg2+ as a favorable process. A matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry study using the four ligands as active MALDI probes was also performed. L1-L4 have also been explored as fluorescence chemosensors in microsamples using NANODROP technology.
AB - The optical response of four new anthracenylmethyl pendant-arm derivatives (L1-L4) of the macrocyclic ligands [12]aneNS3, [12]aneNS 2O, [15]aneNS2O2, and [12]aneN2SO toward the metal ions Zn2+, Cd2+, Pb2+, Cu 2+, Hg2+, Ag+, Fe2+, Co 2+, Ni2+, Mn2+, Ca2+, Na +, Mg2+, and K+ was investigated in 1:1 (v/v) MeCN/H2O solutions. A strong chelation enhancement of quenching effect was observed on the fluorescent emission intensity of L2 as a consequence of the host-guest interaction with Hg2+ and the formation of a 1:2 metal-to-ligand complex. Density functional theory calculations confirmed the formation of a sandwich-type complex between L2 and Hg2+ as a favorable process. A matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry study using the four ligands as active MALDI probes was also performed. L1-L4 have also been explored as fluorescence chemosensors in microsamples using NANODROP technology.
UR - http://www.scopus.com/inward/record.url?scp=77956528202&partnerID=8YFLogxK
U2 - 10.1021/ic1007439
DO - 10.1021/ic1007439
M3 - Article
C2 - 20715769
AN - SCOPUS:77956528202
SN - 0020-1669
VL - 49
SP - 8276
EP - 8286
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 18
ER -