Premium
Supramolecular Luminescent Lanthanide Dimers for Fluoride Sequestering and Sensing
Author(s) -
Liu Tao,
at Aline,
Beyler Maryline,
RegueiroFigueroa Martín,
Nchimi o Katia,
Jeannin Olivier,
Camerel Franck,
Debaene François,
CianféraniSanglier Sarah,
Tripier Raphaël,
PlatasIglesias Carlos,
Charbonnière Loïc J.
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201404847
Subject(s) - supramolecular chemistry , lanthanide , luminescence , europium , cyclen , stacking , fluoride , dimer , synthon , chemistry , hydrogen bond , aqueous solution , photochemistry , inorganic chemistry , crystallography , crystal structure , ion , materials science , molecule , stereochemistry , organic chemistry , optoelectronics
Lanthanide complexes (Ln=Eu, Tb, and Yb) that are based on a C 2 ‐symmetric cyclen scaffold were prepared and characterized. The addition of fluoride anions to aqueous solutions of the complexes resulted in the formation of dinuclear supramolecular compounds in which the anion is confined into the cavity that is formed by the two complexes. The supramolecular assembly process was monitored by UV/Vis absorption, luminescence, and NMR spectroscopy and high‐resolution mass spectrometry. The X‐ray crystal structure of the europium dimer revealed that the architecture of the scaffold is stabilized by synergistic effects of the EuFEu bridging motive, π stacking interactions, and a four‐component hydrogen‐bonding network, which control the assembly of the two [EuL] entities around the fluoride ion. The strong association in water allowed for the luminescence sensing of fluoride down to a detection limit of 24 n M .