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

作者：Mameli Marta; Lippolis Vito^*; Caltagirone Claudia; Luis Capelo Jose; Nieto Faza Olalla; Lodeiro Carlos

来源：Inorganic Chemistry, 2010, 49(18): 8276-8286.

DOI：10.1021/ic1007439

The optical response of four new anthracenylmethyl pendant-arm derivatives (Li-L4) of the macrocyclic ligands [12]aneNS(3),[12]aneNS(2)O, [15]aneNS(2)O(2), and [12]aneN(2)SO toward the metal ions Zn2+, Cd2+, Pb2+, Cu2+, Hg2+, Ag+, Fe2+, Co2+, Ni-2, mn(2+), ca(2), Na+, Mg2+ and K+ was investigated in 1:1 (v/v) MeCN/H20 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.

• 出版日期2010-9-20