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1.
Dalton Trans ; 52(10): 2928-2932, 2023 Mar 07.
Article in English | MEDLINE | ID: mdl-36811361

ABSTRACT

The title cobalt(II) pseudoclathrochelate complexes possess an intermediate trigonal prismatic-trigonal antiprismatic geometry. As follows from PPMS data, they exhibit an SMM behaviour with Orbach relaxation barriers of approximately 90 K. Paramagnetic NMR experiments confirmed a persistence of these magnetic characteristics in solution. Therefore, a straightforward apical functionalization of this 3D molecular platform for its targeted delivery to a given biosystem can be performed without substantial changes.

2.
Int J Mol Sci ; 24(1)2022 Dec 29.
Article in English | MEDLINE | ID: mdl-36613997

ABSTRACT

Parahydrogen-induced nuclear polarization offers a significant increase in the sensitivity of NMR spectroscopy to create new probes for medical diagnostics by magnetic resonance imaging. As precursors of the biocompatible hyperpolarized probes, unsaturated derivatives of phosphoric acid, propargyl and allyl phosphates, are proposed. The polarization transfer to 1H and 31P nuclei of the products of their hydrogenation by parahydrogen under the ALTADENA and PASADENA conditions, and by the PH-ECHO-INEPT+ pulse sequence of NMR spectroscopy, resulted in a very high signal amplification, which is among the largest for parahydrogen-induced nuclear polarization transfer to the 31P nucleus.


Subject(s)
Hydrogen , Magnetic Resonance Imaging , Hydrogen/chemistry , Magnetic Resonance Spectroscopy/methods , Magnetic Resonance Imaging/methods , Hydrogenation
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