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Issue 1, 2014
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The confluence of structure and dynamics in lanthanide(III) chelates: how dynamics help define structure in solution

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Abstract

Coordination exchange processes tend to dominate the solution state behaviour of lanthanide chelates and generally prohibit the study of small conformational changes. In this article we take advantage of coordinatively rigid Eu3+ chelates to examine the small conformational changes that occur in these chelates as water dissociatively exchanges in and out of the inner coordination sphere. The results show that the time-averaged conformation of the chelate alters as the water exchange rate increases. This conformational change reflects a change in the hydration state (q/rLnH6) of the chelate. The hydration state has recently come to be expressed as two separate parameters q and rLnH. However, these two parameters simultaneously describe the same structural considerations which in solution are indistinguishable and intrinsically related to, and dependent upon, the dissociative water exchange rate. This realization leads to the broader understanding that a solution state structure can only be appreciated with reference to the dynamics of the system.

Graphical abstract: The confluence of structure and dynamics in lanthanide(iii) chelates: how dynamics help define structure in solution

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Publication details

The article was received on 06 Aug 2013, accepted on 21 Sep 2013 and first published on 07 Oct 2013


Article type: Paper
DOI: 10.1039/C3DT52143E
Citation: Dalton Trans., 2014,43, 251-258
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    The confluence of structure and dynamics in lanthanide(III) chelates: how dynamics help define structure in solution

    B. C. Webber and M. Woods, Dalton Trans., 2014, 43, 251
    DOI: 10.1039/C3DT52143E

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