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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F12%3A33140856%21RIV13-MSM-15310___
rdf:type
skos:Concept n5:Vysledek
dcterms:description
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.
dcterms: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
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
skos:notation
RIV/61989592:15310/12:33140856!RIV13-MSM-15310___
n5:predkladatel
n6:orjk%3A15310
n4:aktivita
n8:S n8:P
n4:aktivity
P(ED2.1.00/03.0058), P(EE2.3.20.0017), P(GAP207/11/0841), S
n4:cisloPeriodika
48
n4:dodaniDat
n13:2013
n4:domaciTvurceVysledku
n7:2321459 n7:2040123 n7:6407226 n7:3770265
n4:druhVysledku
n10:J
n4:duvernostUdaju
n19:S
n4:entitaPredkladatele
n17:predkladatel
n4:idSjednocenehoVysledku
120362
n4:idVysledku
RIV/61989592:15310/12:33140856
n4:jazykVysledku
n15:eng
n4:klicovaSlova
spin-crossover; crystal-structures; trinuclear complexes; single-molecule magnets
n4:klicoveSlovo
n14:crystal-structures n14:trinuclear%20complexes n14:spin-crossover n14:single-molecule%20magnets
n4:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n4:kontrolniKodProRIV
[B0A4194687A2]
n4:nazevZdroje
Dalton Transactions (print)
n4:obor
n20:CA
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
5
n4:projekt
n12:GAP207%2F11%2F0841 n12:EE2.3.20.0017 n12:ED2.1.00%2F03.0058
n4:rokUplatneniVysledku
n13:2012
n4:svazekPeriodika
41
n4:tvurceVysledku
Boca, Roman Machata, Marek Nemec, Ivan Herchel, Radovan Trávníček, Zdeněk
n4:wos
000311520000016
s:issn
1477-9226
s:numberOfPages
8
n11:doi
10.1039/c2dt31809a
n18:organizacniJednotka
15310