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Lanthanide appended rotaxanes respond to changing chloride concentration

Citation

Allain, C and Beer, PD and Faulkner, S and Jones, MW and Kenwright, AM and Kilah, NL and Knighton, RC and Sorensen, TJ and Tropiano, M, Lanthanide appended rotaxanes respond to changing chloride concentration, Chemical Science, 4, (1) pp. 489-493. ISSN 2041-6520 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 The Royal Society of Chemistry

DOI: doi:10.1039/c2sc21614k

Abstract

Lanthanide appended rotaxanes have been prepared by the CuAAC ‘click’ reaction between an azide appended rotaxane and lanthanide complexes of propargyl DO3A. The resulting complexes are luminescent, and exhibit chloride responsive luminescence behavior consistent with the existence of two independent halide binding pockets, one in the rotaxane cavity and one on the ninth (axial) coordination site of the lanthanide. Strong halide binding to europium gives rise to changes in the relative intensity of the hypersensitive ΔJ = 2 transition compared to the rest of the europium emission spectrum, combined with quenching of the overall intensity of emission as a consequence of non-radiative quenching by the bound halide. The weaker interaction with the rotaxane pocket mediates a subsequent recovery of intensity of the europium centered luminescence despite the considerable separation between the lanthanide and the rotaxane binding pocket.

Graphical abstract: Lanthanide appended rotaxanes respond to changing chloride concentration

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Inorganic Chemistry
Research Field:f-Block Chemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Kilah, NL (Dr Nathan Kilah)
ID Code:84224
Year Published:2013
Web of Science® Times Cited:22
Deposited By:Chemistry
Deposited On:2013-04-30
Last Modified:2017-10-25
Downloads:0

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