ISSN 10703284, Russian Journal of Coordination Chemistry, 2015, Vol. 41, No. 7, pp. 481–485. © Pleiades Publishing, Ltd., 2015.
Over the past decade, metalorganic frameworks
(MOFs) have attracted much attention, not only for
their compositional and structural diversities, but also
for their potential applications in the areas of catalysis
[1–3], luminescence [4–7], gas adsorption and sepa
ration [8–10], ion exchanging [11, 12], magnetism
[13–16] and so on. In the design and construction of
these frameworks organic ligands play crucial roles as
even small changes in flexibility, length, or symmetry
of the ligands can result in a remarkable diversity of
architectures and functions [17–19]. Recently, a large
number of organic ligands as potential linkers, poly
nuclear coordination polymers consisting carboxylate
ligands have witnessed the most important develop
ment . To the best of our knowledge, complexes
based on 2,3',5,5'biphenyl tetracarboxylic ligand
have been rarely reported . Therefore, we select
2,3',5,5'biphenyl tetracarboxylic acid (H
ering that its four carboxyl groups can provide versa
tile binding fashions. In this paper, we report on the
synthesis, crystal structure and magnetic properties
), constructed from
ligands with Mn(II), which exists antiferromag
netic interactions between the Mn(II) centers.
Materials and methods.
All solvents and reagents
employed were commercially available and used with
out further purification. The C, H, and N microanal
yses were carried out on a PerkinElmer 240 elemental
The article is published in the original.
analyzer. Thermogravimetric analyses (TGA) were
taken with PerkinElmer Pyrisl (30–900
(g)). Xray powder diffraction was regis
tered with a Bruker AXS D8 advanced automated dif
fractometer with Cu
radiation. Infrared spectra
were recorded on the powder samples of a crystal
embedded in KBr pellets from 400 to 4000 nm at a
speed of 100 nm/min. The magnetic data were col
lected on a Quantum Design MPMS SQUIDXL5
magnetometer using the crushed singlecrystal sam
ples. Magnetic data were corrected for the diamag
netic contribution calculated from Pascal constants
 and a background of the sample holder.
Solvothermal synthesis of I.
(0.26 mmol) was added to the DMF–CH
O (3 : 3 : 2; 4 mL) solution of H
L (15 mg,
0.45 mmol), and the mixture was stirred for ~20 min
in air. Then it was heated at 75
C for 2 days, followed
by slow cooling (5
). The resulting light yellow
crystals were washed with distilled water and dried in
air (the yield was ~60%).
IR spectrum (KBr;
): 3388 m, 1656 s, 1627 m,
1582 m, 1495 s, 1385 s, 775 m.
Xray crystal determination.
was collected at room temperature (293(2) K) with
a Bruker P4 diffractometer with Mo
0.71073 Å) and graphite monochromator using the
scan mode. The structure was solved by direct
anal. calcd., %: C, 36.01; H, 3.27; N, 3.82.
Found, %: C, 36.09; H, 3.20; N, 4.80.
Synthesis, Strucure, and Magnetic Property
of a 3D Mn(II) Coordination Polymer Based
on 2,3',5,5'Bophenyl Tetracarboxylic Acid
X. N. Zhang and Z. B. Han*
College of Chemistry, Liaoning University, Shenyang, 110036 P.R. China
Received December 19, 2014
—A new coordination polymer Mn
L = 2,3',5,5'biphenyl tetracarboxy
lic acid has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG
and singlecrystal Xray diffraction. The Xray diffraction analysis shows that
lizes in the monoclinic crystal system space group
. The magnetic studies of I showed that there exist anti
ferromagnetic interactions between the Mn(II) centres. The unit cell parameters for
= 10.5726(14) Å,
= 1253.9(3) Å