期刊
MAGNETIC RESONANCE IN CHEMISTRY
卷 41, 期 10, 页码 800-805出版社
WILEY-BLACKWELL
DOI: 10.1002/mrc.1265
关键词
MRI; Gd(III) chelates; relaxivity; beta-cyclodextrin
Gadolinium-chelates bearing hydrophobic substituents on their surfaces form inclusion complexes with beta-cyclodextrin. When the chelate contains more than one substituent, the observed relaxation enhancement has to be analysed on the basis of the contributions arising from the actual speciation of the resulting inclusion complexes. This analysis allows the assessment of the binding constants for the individual inclusion complexes, as well as their specific relaxation enhancements. The relaxivities obtained of the supramolecular adducts display a good linearity with their molecular weights to outline that, in these systems, the main determinant of the relaxation enhancement is represented by the overall molecular reorientational time. Copyright (C) 2003 John Wiley Sons, Ltd.
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