TY - JOUR
T1 - A unique 2-D hollow sheet structure and magnetic behavior of a cyanide- and triamine-bridged MnIICrIII ferrimagnet
AU - Kaneko, Wakako
AU - Kitagawa, Susumu
AU - Ohba, Masaaki
N1 - Funding Information:
This work was supported by a Grant-in-aid for Science Research in a Priority Area “Chemistry of Coordination Space” (16074209) from the Ministry of Education, Science, Sports and Culture of Japan, Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporation (JST), Japan. W.K. is grateful to JSPS Research Fellowships for Young Scientists.
PY - 2007/6/15
Y1 - 2007/6/15
N2 - A 2-D cyanide- and triamine-bridged MnIICrIII ferrimagnet, [Mn3(dien)2(H2O)2][Cr(CN)6]2 · 4H2O (1), has been prepared by the combination of Mn2+, diethylenetriamine (dien) co-ligand and [Cr(CN)6]3-. This compound forms a unique 2-D hollow sheet structure constructed by 1-D ribbon networks on the basis of triamine (dien)-bridged trinuclear MnII units. Compound 1 readily looses all lattice water molecules and irreversibly changes to a dehydrated form, [Mn3(dien)2(H2O)2][Cr(CN)6]2 (1a), in the air. Cryomagnetic studies of 1 and 1a reveal an antiferromagnetic interaction between CrIII and MnII ions, and an unusual long-range ferrimagnetic ordering below 30 K (1) and 40 K (1a) with multiple magnetic phase changes below TC. MCD spectra of 1a show a strong Faraday ellipticity associated with the LMCT band of the Cr-CN below 300 nm. Faraday ellipticity is remarkably enhanced below TC in line with the characteristics long-range ferrimagnetic ordering.
AB - A 2-D cyanide- and triamine-bridged MnIICrIII ferrimagnet, [Mn3(dien)2(H2O)2][Cr(CN)6]2 · 4H2O (1), has been prepared by the combination of Mn2+, diethylenetriamine (dien) co-ligand and [Cr(CN)6]3-. This compound forms a unique 2-D hollow sheet structure constructed by 1-D ribbon networks on the basis of triamine (dien)-bridged trinuclear MnII units. Compound 1 readily looses all lattice water molecules and irreversibly changes to a dehydrated form, [Mn3(dien)2(H2O)2][Cr(CN)6]2 (1a), in the air. Cryomagnetic studies of 1 and 1a reveal an antiferromagnetic interaction between CrIII and MnII ions, and an unusual long-range ferrimagnetic ordering below 30 K (1) and 40 K (1a) with multiple magnetic phase changes below TC. MCD spectra of 1a show a strong Faraday ellipticity associated with the LMCT band of the Cr-CN below 300 nm. Faraday ellipticity is remarkably enhanced below TC in line with the characteristics long-range ferrimagnetic ordering.
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U2 - 10.1016/j.poly.2006.11.037
DO - 10.1016/j.poly.2006.11.037
M3 - Article
AN - SCOPUS:34249699659
VL - 26
SP - 2252
EP - 2258
JO - Polyhedron
JF - Polyhedron
SN - 0277-5387
IS - 9-11
ER -