TY  - JOUR
A1  - Wacker, Philipp
A1  - Kleinpeter, Erich
T1  - Stoichiometry, complex stability, molecular size and conformational variations of metal ion crown ether complexes subject to diffusion coefficients in nonaqueous solutions
N2  - Both the stoichiometry and complex stability constants of crown ether complexes with metal ions have been determined by examining gradual changes in their diffusional behavior in nonaqueous solution. Diffusion coefficients, D, were evaluated by pulsed field gradient (PFG) NMR titration experiments whilst complex stability constants were determined by nonlinear curve-fitting procedures, D versus csol., which also allow the treatment of multiple complexation equilibria (1:1 to 1:2 stoichiometries). Differences in the diffusion coefficients of the various free crown ethers with respect to their metal ion complexes indicate great sensitivity to both conformational changes and changes in molecular size upon complexation.
Y1  - 2007
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/30223
UR  - http://www.springerlink.com/content/a584066q18q02857/
ER  -