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  • A series of the trinuclear [{Fe(3MeO-L)(2)}(2){u(6)-Ln(eta(2)-NO3)(H2O)}].nH(2)O, (Ln = Gd (2a), Tb (2b), Dy (2c), Ho (2d), Er (2e), Y (2f), H-2-3MeO-L = 2-hydroxy-3-methoxy-phenylsalicylaldimine) complexes were prepared and thoroughly characterized. The crystal structure of 2b was determined and it revealed that the heterotrinuclear complex consists of two anionic [Fe(3MeO-L)(2)](-) subunits coordinated to the [Tb(H2O)(eta(2)-NO3)](2+) bridging moiety through the phenolato and methoxy oxygen atoms. The angular distortion within the coordination polyhedron of the [Fe(3MeO-L)(2)](-) subunits grows significantly upon coordination to the Ln atom of the bridging moiety, which consequently induces an increase in the parameter of the axial magnetic anisotropy. This conclusion is obvious from the comparison and analysis of the structural (XRD) and magnetic data of the yttrium trimer 2f and the precursor complex (Pr3NH)-[Fe(3MeO-L)(2)] (1, Pr3NH = the tripropylammonium cation), where D-Fe(1) = +0.80 cm(-1) and D-Fe(2f) = +1.64 cm(-1). Furthermore, a weak antiferromagnetic interaction between the Fe(III) centres was found in 2f (J(FeFe) = -0.26 cm(-1)). The magnetic parameters of 2f were used in the fitting of the magnetic properties of 2a as constraints. The ferromagnetic nature of the Fe-Gd interaction in 2a was confirmed, with J(GdFe) = +1.40 cm(-1), D-Gd = -0.26 cm(-1). Moreover, in the case of the Tb (2b) and Dy (2c) compounds, a slow relaxation of the magnetization at low temperature (below 1.9 K) was observed upon the dehydration of the parent compounds.
  • A series of the trinuclear [{Fe(3MeO-L)(2)}(2){u(6)-Ln(eta(2)-NO3)(H2O)}].nH(2)O, (Ln = Gd (2a), Tb (2b), Dy (2c), Ho (2d), Er (2e), Y (2f), H-2-3MeO-L = 2-hydroxy-3-methoxy-phenylsalicylaldimine) complexes were prepared and thoroughly characterized. The crystal structure of 2b was determined and it revealed that the heterotrinuclear complex consists of two anionic [Fe(3MeO-L)(2)](-) subunits coordinated to the [Tb(H2O)(eta(2)-NO3)](2+) bridging moiety through the phenolato and methoxy oxygen atoms. The angular distortion within the coordination polyhedron of the [Fe(3MeO-L)(2)](-) subunits grows significantly upon coordination to the Ln atom of the bridging moiety, which consequently induces an increase in the parameter of the axial magnetic anisotropy. This conclusion is obvious from the comparison and analysis of the structural (XRD) and magnetic data of the yttrium trimer 2f and the precursor complex (Pr3NH)-[Fe(3MeO-L)(2)] (1, Pr3NH = the tripropylammonium cation), where D-Fe(1) = +0.80 cm(-1) and D-Fe(2f) = +1.64 cm(-1). Furthermore, a weak antiferromagnetic interaction between the Fe(III) centres was found in 2f (J(FeFe) = -0.26 cm(-1)). The magnetic parameters of 2f were used in the fitting of the magnetic properties of 2a as constraints. The ferromagnetic nature of the Fe-Gd interaction in 2a was confirmed, with J(GdFe) = +1.40 cm(-1), D-Gd = -0.26 cm(-1). Moreover, in the case of the Tb (2b) and Dy (2c) compounds, a slow relaxation of the magnetization at low temperature (below 1.9 K) was observed upon the dehydration of the parent compounds. (en)
Title
  • A new family of Fe(2)Ln complexes built from mononuclear anionic Schiff base subunits
  • A new family of Fe(2)Ln complexes built from mononuclear anionic Schiff base subunits (en)
skos:prefLabel
  • A new family of Fe(2)Ln complexes built from mononuclear anionic Schiff base subunits
  • A new family of Fe(2)Ln complexes built from mononuclear anionic Schiff base subunits (en)
skos:notation
  • RIV/61989592:15310/12:33140856!RIV13-MSM-15310___
http://linked.open...avai/predkladatel
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(ED2.1.00/03.0058), P(EE2.3.20.0017), P(GAP207/11/0841), S
http://linked.open...iv/cisloPeriodika
  • 48
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 120362
http://linked.open...ai/riv/idVysledku
  • RIV/61989592:15310/12:33140856
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • spin-crossover; crystal-structures; trinuclear complexes; single-molecule magnets (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [B0A4194687A2]
http://linked.open...i/riv/nazevZdroje
  • Dalton Transactions (print)
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 41
http://linked.open...iv/tvurceVysledku
  • Herchel, Radovan
  • Trávníček, Zdeněk
  • Nemec, Ivan
  • Boca, Roman
  • Machata, Marek
http://linked.open...ain/vavai/riv/wos
  • 000311520000016
issn
  • 1477-9226
number of pages
http://bibframe.org/vocab/doi
  • 10.1039/c2dt31809a
http://localhost/t...ganizacniJednotka
  • 15310
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