TY - JOUR
T1 - Lanthanide-3d cyanometalate chains Ln(III)-M(III) (Ln = Pr, Nd, Sm, Eu, Gd, Tb; M = Fe) with the tridentate ligand 2,4,6-tri(2-pyridyl)-1,3,5-triazine (tptz)
T2 - Evidence of ferromagnetic interactions for the Sm(III)-M(III) compounds (M = Fe, Cr)
AU - Zhao, Hanhua
AU - Lopez, Nazario
AU - Prosvirin, Andrey
AU - Chifotides, Helen T.
AU - Dunbar, Kim R.
PY - 2007
Y1 - 2007
N2 - A series of cyanide-bridged chain mixed Fe(iii)/Ln(iii) (Ln = Pr, Nd, Sm, Eu, Gd, Tb) complexes with the tridentate ligand 2,4,6-tri(2-pyridyl)-1,3,5- triazine (tptz) used as a capping group has been prepared. Reactions of tptz and LnCl3 with K3Fe(CN)6 yield a family of air-stable 1-D compounds {[Pr(tptz)(H2O)4Fe(CN) 6]·8H2O}∞ (1), {[Nd(tptz)(H 2O)4Fe(CN)6]·8H2O} ∞ (2), {[Sm(tptz)(H2O)4Fe(CN) 6]·8H2O}∞ (3), {[Eu(tptz)(H 2O)4Fe(CN)6]·6H2O} ∞ (4), {[Gd(tptz)(H2O)4Fe(CN) 6]·6H2O}∞ (5), and {[Tb(tptz)(H2O)4Fe(CN)6]·8H 2O}∞ (6). Temperature dependent magnetic susceptibility studies of 1-6 reveal that in 3, the Sm(iii) and Fe(iii) ions are ferromagnetically coupled with 3-D ordering occurring below 3.5 K. The appearance of the frequency dependent out-of-phase signal is explained in terms of an ordering with a spin glass-like behavior. To compare the magnetic behavior of 3 with related compounds, {[Sm(tptz)(H2O)4Co(CN) 6]·8H2O}∞ (7) and {[La(tptz)(DMF)(H2O)3Fe(CN)6]·5H 2O}∞ (8), {[Sm(tmphen)(DMF)3(H 2O)Fe(CN)6]·2H2O}∞ (9), {[Sm(tmphen)2(H2O)2Fe(CN)6] ·MeOH·13H2O}∞ (10) and {[Sm(tmphen)2(H2O)2Cr(CN)6] ·MeOH·9H2O}∞ (11) with 3,4,7,8-tetramethyl-1,10-phenanthroline (tmphen) were also prepared.
AB - A series of cyanide-bridged chain mixed Fe(iii)/Ln(iii) (Ln = Pr, Nd, Sm, Eu, Gd, Tb) complexes with the tridentate ligand 2,4,6-tri(2-pyridyl)-1,3,5- triazine (tptz) used as a capping group has been prepared. Reactions of tptz and LnCl3 with K3Fe(CN)6 yield a family of air-stable 1-D compounds {[Pr(tptz)(H2O)4Fe(CN) 6]·8H2O}∞ (1), {[Nd(tptz)(H 2O)4Fe(CN)6]·8H2O} ∞ (2), {[Sm(tptz)(H2O)4Fe(CN) 6]·8H2O}∞ (3), {[Eu(tptz)(H 2O)4Fe(CN)6]·6H2O} ∞ (4), {[Gd(tptz)(H2O)4Fe(CN) 6]·6H2O}∞ (5), and {[Tb(tptz)(H2O)4Fe(CN)6]·8H 2O}∞ (6). Temperature dependent magnetic susceptibility studies of 1-6 reveal that in 3, the Sm(iii) and Fe(iii) ions are ferromagnetically coupled with 3-D ordering occurring below 3.5 K. The appearance of the frequency dependent out-of-phase signal is explained in terms of an ordering with a spin glass-like behavior. To compare the magnetic behavior of 3 with related compounds, {[Sm(tptz)(H2O)4Co(CN) 6]·8H2O}∞ (7) and {[La(tptz)(DMF)(H2O)3Fe(CN)6]·5H 2O}∞ (8), {[Sm(tmphen)(DMF)3(H 2O)Fe(CN)6]·2H2O}∞ (9), {[Sm(tmphen)2(H2O)2Fe(CN)6] ·MeOH·13H2O}∞ (10) and {[Sm(tmphen)2(H2O)2Cr(CN)6] ·MeOH·9H2O}∞ (11) with 3,4,7,8-tetramethyl-1,10-phenanthroline (tmphen) were also prepared.
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U2 - 10.1039/b616016f
DO - 10.1039/b616016f
M3 - Article
C2 - 17297516
AN - SCOPUS:33847013712
SN - 1477-9226
SP - 878
EP - 888
JO - Dalton Transactions
JF - Dalton Transactions
IS - 8
ER -