Abstract
AbstractMolecular imaging relies on the availability of imaging probes designed to modify their efficiency in the presence of a specific parameter, among which pH is one of the most investigated. Introduction of an aminoethyl moiety into the well‐known DO3A platform imparts the desired pH sensitivity to the corresponding Gd3+ complex. The amine group is accessible and easy to functionalize; in particular, the possibility of tuning its pKAH through N‐substitution makes it a good pH‐responsive functionality to access a novel class of tailored pH‐sensitive MRI contrast agents. This was demonstrated by a relaxometric study on a functionalized Gd‐DO3A complex bearing a simple primary amine group and comparison with the results of the corresponding N,N‐dimethyl analogue.
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