TY - JOUR
T1 - Layered manganese 4-phosphonoisophthalates (4-piH 4) embedding Mn-O chains with metamagnetism in Mn 3(4-piH) 2(H 2O) 3•H 2O
AU - Jin, Haojun
AU - Wang, Pengfei
AU - Bao, Songsong
AU - Zheng, Limin
AU - Yao, Cheng
PY - 2012/6
Y1 - 2012/6
N2 - Two manganese phosphonates Mn 3(4-piH) 2(H 2O) 3•H 2O (1) and Mn 5(4-piH) 2(4-piH 2) 2(phen) 2(H 2O) 4 (2) (4-piH 4 = 4-phosphonoisophthalic acid, phen = 1,10-phenanthroline) have been synthesized under hydrothermal conditions in the presence of organic co-ligand. Both compounds exhibit layer structures but with different topologies. In compound 1, a complicated "ladder- like" chain of {Mn 3O 3}O 2 which contains three- and six-member rings made up of triangular shaped {Mn 3O 3} trimers is found. The chains are linked by the PO 3C groups to form an inorganic layer. The phenyl and protonated carboxylate groups are pendent between the layers with extensive hydrogen bonds. In compound 2, tetramers of {Mn 4O 6} are connected by the {MnO 6} octahedra through corner-sharing to form an infinite chain, which is further bridged by 4-piH 3 - ligands into a thick hybrid layer. Magnetic measurements reveal that antiferromagnetic interactions are dominant in both compounds. Metamagnetism is observed in compound 1 at low temperature, while no long range ordering is found in compound 2 down to 1.8 K.
AB - Two manganese phosphonates Mn 3(4-piH) 2(H 2O) 3•H 2O (1) and Mn 5(4-piH) 2(4-piH 2) 2(phen) 2(H 2O) 4 (2) (4-piH 4 = 4-phosphonoisophthalic acid, phen = 1,10-phenanthroline) have been synthesized under hydrothermal conditions in the presence of organic co-ligand. Both compounds exhibit layer structures but with different topologies. In compound 1, a complicated "ladder- like" chain of {Mn 3O 3}O 2 which contains three- and six-member rings made up of triangular shaped {Mn 3O 3} trimers is found. The chains are linked by the PO 3C groups to form an inorganic layer. The phenyl and protonated carboxylate groups are pendent between the layers with extensive hydrogen bonds. In compound 2, tetramers of {Mn 4O 6} are connected by the {MnO 6} octahedra through corner-sharing to form an infinite chain, which is further bridged by 4-piH 3 - ligands into a thick hybrid layer. Magnetic measurements reveal that antiferromagnetic interactions are dominant in both compounds. Metamagnetism is observed in compound 1 at low temperature, while no long range ordering is found in compound 2 down to 1.8 K.
KW - carboxylate-phosphonate
KW - coordination polymer
KW - magnetic property
KW - manganese
KW - metamagnetism
UR - http://www.scopus.com/inward/record.url?scp=84862809854&partnerID=8YFLogxK
U2 - 10.1007/s11426-012-4552-7
DO - 10.1007/s11426-012-4552-7
M3 - 文章
AN - SCOPUS:84862809854
SN - 1674-7291
VL - 55
SP - 1047
EP - 1054
JO - Science China Chemistry
JF - Science China Chemistry
IS - 6
ER -