Dinuclear Fe(III) Hydroxypropyl-Appended Macrocyclic Complexes as MRI Probes.
Dinuclear Fe(III) Hydroxypropyl-Appended Macrocyclic Complexes as MRI Probes.
复制标题
双核 Fe(III) 羟丙基附加大环配合物作为 MRI 探针。
DOI:
10.1021/acs.inorgchem.1c00634
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发表时间:
2021-06-21
影响因子:
4.6
通讯作者:
Morrow, Janet R.
中科院分区:
文献类型:
--
作者:
Asik, Didar;Abozeid, Samira M.;Turowski, Steven G.;Spernyak, Joseph A.;Morrow, Janet R.
Four high spin Fe(III) macrocyclic complexes, including three dinuclear and one mononuclear complex, were prepared towards the development of more effective iron-based MRI contrast agents. All four complexes contain a 1,4,7-triazacyclononane macrocyclic backbone with two hydroxypropyl pendant groups, an ancillary aryl or biphenyl group and a coordination site for a water ligand. The pH potentiometric titrations support one or two deprotonations of the complexes, most likely deprotonation of hydroxypropyl groups at near neutral pH. Variable temperature 17O NMR studies suggest that the inner-sphere water ligand is slow to exchange with bulk water on the NMR time scale. Water proton T1 relaxation times measured for solutions of the Fe(III) complexes at pH 7.2 showed that the dinuclear complexes have a 2–3-fold increase in r1 relaxivity in comparison to the mononuclear complex per molecule at field strengths ranging from 1.4 T to 9.4 T. The most effective agent, a dinuclear complex with macrocycles linked through para-substitution of an aryl group (Fe2(PARA)), has an r1 of 6.7 mM−1s−1 at 37 °C and 4.7 T or 3.3 mM−1s−1 per iron center in the presence of serum albumin and shows enhanced blood pool and kidney contrast in mice MRI studies.
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影响因子:
4.6
作者:
Asik, Didar;Smolinski, Rachel;Morrow, Janet R.
通讯作者:
Morrow, Janet R.
影响因子:
3.3
作者:
Damme, Nikolas M.;Fernandez, Diego P.;Morton, Kathryn A.
通讯作者:
Morton, Kathryn A.
影响因子:
6.7
作者:
Dumas, Stephane;Jacques, Vincent;Caravan, Peter
通讯作者:
Caravan, Peter
影响因子:
--
作者:
Bales, Brian C.;Grimmond, Brian;Roberts, Jeannette
通讯作者:
Roberts, Jeannette
影响因子:
4.6
作者:
Aime, Silvio;Baroni, Simona;Baranyai, Zsolt
通讯作者:
Baranyai, Zsolt