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

Marta Mameli, Vito Lippolis, Claudia Caltagirone, José Luis Capelo, Olalla Nieto Faza, Carlos Lodeiro

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)8276-8286
Number of pages11
JournalInorganic Chemistry
Volume49
Issue number18
DOIs
Publication statusPublished - 20 Sep 2010

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