[{Re(6)Q(8)}(SO3)(6)](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
- 주제(기타) Chemistry, Inorganic & Nuclear
- 설명문(일반) [Brylev, Konstantin A.; Kashnik, Ilya V.; Mironov, Yuri V.] RAS, Nikolaev Inst Inorgan Chem SB, 3 Acad Lavrentiev Ave, Novosibirsk 630090, Russia; [Brylev, Konstantin A.; Kashnik, Ilya V.; Mironov, Yuri V.] Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia; [Elistratova, Julia G.] Kazan Volga Reg Fed Univ, Kremlyovskaya Str 18, Kazan 420008, Russia; [Nizameev, Irek R.; Gubaidullin, Aidar T.; Kholin, Kiri V.; Mustafina, Asiya R.] Russian Acad Sci, FRC Kazan Sci Ctr, Arbuzov Inst Organ & Phys Chem, 8 Arbuzov Str, Kazan 420088, Russia; [Kitamura, Noboru] Hokkaido Univ, Dept Chem, Fac Sci, Sapporo, Hokkaido 0600810, Japan; [Kim, Sung-Jin] Ewha Womans Univ, Dept Chem & Nano Sci, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2019
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000165796
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acs.inorgchem.9b02346
- PubMed https://pubmed.ncbi.nlm.nih.gov/31746193
초록/요약
New octahedral rhenium cluster complexes [{Re(6)Q(8)} (SO3)(6)](10-) (Q= S or Se) were synthesized starting from [{Re(6)Q(8)}(H2O)(4)(OH)(2)]center dot 12H(2)O. 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 (Gd-x[{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[{Re(6)Q(8)}(SO3)(6)]-based colloids with the magnetic relaxivity values of r(1(2)) = 21.0(24.1) and r(1(2)) = 25.9(29.8) mM(-1) s(-1) for the {Re6S8}(2+) and {Re6Se8}(2+) derivatives, respectively.
more