Research output: Contribution to journal › Article › peer-review
10- (Q = S or Se) : Facile Synthesis and Properties of the Most Highly Charged Octahedral Cluster Complexes and High Magnetic Relaxivity of Their Colloids with Gd3+ Ions. / Brylev, Konstantin A.; Akhmadeev, Bulat S.; Elistratova, Julia G. et al.
In: Inorganic Chemistry, Vol. 58, No. 23, 02.12.2019, p. 15889-15897.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - 10- (Q = S or Se)
T2 - Facile Synthesis and Properties of the Most Highly Charged Octahedral Cluster Complexes and High Magnetic Relaxivity of Their Colloids with Gd3+ Ions
AU - Brylev, Konstantin A.
AU - Akhmadeev, Bulat S.
AU - Elistratova, Julia G.
AU - Nizameev, Irek R.
AU - Gubaidullin, Aidar T.
AU - Kholin, Kirill V.
AU - Kashnik, Ilya V.
AU - Kitamura, Noboru
AU - Kim, Sung Jin
AU - Mironov, Yuri V.
AU - Mustafina, Asiya R.
PY - 2019/12/2
Y1 - 2019/12/2
N2 - New octahedral rhenium cluster complexes [{Re6Q8}(SO3)6]10- (Q = S or Se) were synthesized starting from [{Re6Q8}(H2O)4(OH)2]·12H2O. The complexes were crystallized as sodium salts and characterized by X-ray single-crystal diffraction and elemental analyses, IR, UV/vis and luminescence spectroscopies. Magnetic relaxation data demonstrate the complex formation of the cluster units with gadolinium ions. The analysis of the magnetic relaxation rates measured at various Gd:cluster ratios and different concentrations revealed the conversion of the aggregates (Gdx[{Re6Se8}(SO3)6]y)n- into a nanoparticulate form even at x = 1 and y ≥ 1. Thus, the self-assembly of the cluster units into the nanoparticles is greatly facilitated by counterion binding with sodium cations. The concentration conditions were optimized for the formation and hydrophilization of NaxGdy[{Re6Q8}(SO3)6]-based colloids with the magnetic relaxivity values of r1(2) = 21.0(24.1) and r1(2) = 25.9(29.8) mM-1 s-1 for the {Re6S8}2+ and {Re6Se8}2+ derivatives, respectively.
AB - New octahedral rhenium cluster complexes [{Re6Q8}(SO3)6]10- (Q = S or Se) were synthesized starting from [{Re6Q8}(H2O)4(OH)2]·12H2O. The complexes were crystallized as sodium salts and characterized by X-ray single-crystal diffraction and elemental analyses, IR, UV/vis and luminescence spectroscopies. Magnetic relaxation data demonstrate the complex formation of the cluster units with gadolinium ions. The analysis of the magnetic relaxation rates measured at various Gd:cluster ratios and different concentrations revealed the conversion of the aggregates (Gdx[{Re6Se8}(SO3)6]y)n- into a nanoparticulate form even at x = 1 and y ≥ 1. Thus, the self-assembly of the cluster units into the nanoparticles is greatly facilitated by counterion binding with sodium cations. The concentration conditions were optimized for the formation and hydrophilization of NaxGdy[{Re6Q8}(SO3)6]-based colloids with the magnetic relaxivity values of r1(2) = 21.0(24.1) and r1(2) = 25.9(29.8) mM-1 s-1 for the {Re6S8}2+ and {Re6Se8}2+ derivatives, respectively.
KW - BUILDING-BLOCKS
KW - COORDINATION POLYMERS
KW - LIGANDS SYNTHESIS
KW - LUMINESCENCE
KW - REDOX
KW - LN
UR - http://www.scopus.com/inward/record.url?scp=85075456534&partnerID=8YFLogxK
U2 - 10.1021/acs.inorgchem.9b02346
DO - 10.1021/acs.inorgchem.9b02346
M3 - Article
C2 - 31746193
AN - SCOPUS:85075456534
VL - 58
SP - 15889
EP - 15897
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 23
ER -
ID: 22405673