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Excitement in F-block: responsive lanthanide complexes

Parker, David; Bruce, James I.; Blair, Stephanie and Lowe, Mark P. (2001). Excitement in F-block: responsive lanthanide complexes. Journal of Inorganic Biochemistry, 86(1) pp. 84–85.

URL: http://www.sciencedirect.com/science?_ob=ArticleUR...
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/S0162-0134(01)00254-9
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Abstract

Two series of lanthanide complexes have been prepared which exhibit a pronounced pH-dependence of either
luminescent emission t or of relaxivity. In a prototypical example of the luminescent europium series, the effect of
structural variation, especially axial donor exchange on the optical and NMR properties of the complex, has been
interpreted in terms of a simple ligand electrostatic perturbation model, in which the effect of the polarisability of the axial
donor predominates. Emissive Eu and Tb complexes have been incorporated into sol-gel matrices and examined in a flow
system: perturbation of the singlet or triplet excited state of the sensitising chromophore is revealed by changes in the
emission intensity ratio or in excitation spectra, pH dependent variation of the hydration state of the lanthanide ion may
also be controlled by structural perturbation of an intramolecular sulfonamide ligation process, allowing pH-dependent
relaxivity to be defined over the range 6 to 8, in human serum solution.

Item Type: Journal Article
ISSN: 0162-0134
Academic Unit/Department: Science > Life, Health and Chemical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Biomedical Research Network (BRN)
Item ID: 3803
Depositing User: James Bruce
Date Deposited: 30 Jun 2006
Last Modified: 07 Mar 2014 13:46
URI: http://oro.open.ac.uk/id/eprint/3803
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