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2-aminoisobutyric acid in Co(II) and Co(II)/Ln(III) chemistry:homometallic and heterometallic clusters.

Autorzy

G. J. Sopasis

M. Orfanoudaki

P. Zarmpas

Aggelos Philippidis

Miłosz Siczek

Tadeusz Lis

J. R. O’Brien

Constantinos J. Milios

Rok wydania

2012

Czasopismo

Inorganic Chemistry

Numer woluminu

51

Strony

1170-1179

DOI

10.1021/ic2024007

Kolekcja

Naukowa

Język

Angielski

Typ publikacji

Artykuł

Streszczenie

The synthesis and magnetic properties of 13 new homo- and heterometallic Co(II) complexes containing the artificial amino acid 2-amino-isobutyric acid, aibH, are reported: [CoII4(aib)3(aibH)3(NO3)](NO3)4·2.8CH3OH·0.2H2O (1·2.8CH3OH·0.2H2O), {Na2[CoII2(aib)2(N3)4(CH3OH)4]}n (2), [CoII6LaIII(aib)6(OH)3(NO3)2(H2O)4(CH3CN)2]·0.5[La(NO3)6]·0.75(ClO4)·1.75(NO3)·3.2CH3CN·5.9H2O (3·3.2CH3CN·5.9H2O), [CoII6PrIII(aib)6(OH)3(NO3)3(CH3CN)6]·[Pr(NO3)5]·0.41[Pr(NO3)3(ClO4)0.5(H2O)1.5]·0.59[Co(NO3)3(H2O)]·0.2(ClO4)·0.25H2O (4·0.25H2O), [CoII6NdIII(aib)6(OH)3(NO3)2.8(CH3OH)4.7(H2O)1.5]·2.7(ClO4)·0.5(NO3)·2.26CH3OH·0.24H2O (5·2.26CH3OH·0.24H2O), [CoII6SmIII(aib)6(OH)3(NO3)3(CH3CN)6]·[Sm(NO3)5]·0.44[Sm(NO3)3(ClO4)0.5(H2O)1.5]·0.56[Co(NO3)3(H2O)]·0.22(ClO4)·0.3H2O (6·0.3H2O), [CoII6EuIII(aib)6(OH)3(NO3)3(CH3OH)4.87(H2O)1.13](ClO4)2.5(NO3)0.5·2.43CH3OH·0.92H2O (7·2.43CH3OH·0.92H2O), [CoII6GdIII(aib)6(OH)3(NO3)2.9(CH3OH)4.9(H2O)1.2]·2.6(ClO4)·0.5(NO3)·2.58CH3OH·0.47H2O (8·2.58CH3OH·0.47H2O), [CoII6TbIII(aib)6(OH)3(NO3)3(CH3CN)6]·[Tb(NO3)5]·0.034[Tb(NO3)3(ClO4)0.5(H2O)0.5]·0.656[Co(NO3)3(H2O)]·0.343(ClO4)·0.3H2O (9·0.3H2O), [CoII6DyIII(aib)6(OH)3(NO3)2.9(CH3OH)4.92(H2O)1.18](ClO4)2.6(NO3)0.5·2.5CH3OH·0.5H2O (10·2.5CH3OH·0.5H2O), [CoII6HoIII(aib)6(OH)3(NO3)3(CH3CN)6]·0.27[Ho(NO3)3(ClO4)0.35(H2O)0.15]·0.656[Co(NO3)3(H2O)]·0.171(ClO4) (11), [CoII6ErIII(aib)6(OH)4(NO3)2(CH3CN)2.5(H2O)3.5](ClO4)3·CH3CN·0.75H2O (12·CH3CN·0.75H2O), and [CoII6TmIII(aib)6(OH)3(NO3)3(H2O)6]·1.48(ClO4)·1.52(NO3)·3H2O (13·3H2O). Complex 1 describes a distorted tetrahedral metallic cluster, while complex 2 can be considered to be a 2-D coordination polymer. Complexes 3–13 can all be regarded as metallo-cryptand encapsulated lanthanides in which the central lanthanide ion is captivated within a [CoII6] trigonal prism. dc and ac magnetic susceptibility studies have been carried out in the 2–300 K range for complexes 1, 3, 5, 7, 8, 10, 12, and 13, revealing the possibility of single molecule magnetism behavior for complex 10.

Adres publiczny

https://doi.org/10.1021/ic2024007

Strona internetowa wydawcy

https://www.acs.org/content/acs/en.html

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