Synthesis of two novel porous framework hybri
d materials, [Co(4,4'-bipy)V
2O
6] (
1) an
d[{Co
2(4,4'-bipy)
3(H
2O)
2}V
4O
12]·2H
2O (
2), an
d their characterization by infrare
d spectroscopy,thermogravimetry, elemental analysis, manganometric titration, surface area measurement,bon
d valence sum calculations, temperature-
depen
dent magnetic susceptibility measurement,an
d single-crystal X-ray structure analyses is
describe
d. Both compoun
ds exhibit remarkablethermal stability. The three-
dimensional structures of
1 an
d 2 are compose
d of fuse
d {VO
4}motifs linke
d by {Co(4,4'-bipy)} coor
dination polymers. The structure of
1 is comprise
d of{CoO
3N
2} trigonal bipyrami
ds, linke
d in two
dimensions by corner-sharing {VO
4} tetrahe
draan
d in the thir
d dimension by the 4,4'-bipyri
dine ligan
ds. In the bimetallic layers, the cobaltcenters are bri
dge
d alternately by {VO
4} an
d {V
2O
7} units, generating alternating eight-membere
d {Co
2V
2O
4} an
d twelve-membere
d {Co
2V
4O
6} rings. The crystal structure of
2consists of a novel three-
dimensional network containing two types of octahe
dral Co
2+ ionslinke
d by a {V
2O
7} group. The cobalt centers in
2 are linke
d in three
dimensions by bri
dging4,4'-bipyri
dine ligan
ds. The structure contains rather large channels parallel to the
c-axis.A
disor
dere
d water molecule of crystallization is present in the channels. Crystal
data forC
10H
8N
2O
6CoV
2,
1: triclinic space group
P![](/images/entities/onemacr.gif)
(No. 2),
a = 8.1517(4) Å,
b = 8.5794(4) Å,
c =10.1233(5) Å,
![](/images/gifchars/alpha.gif)
= 87.0170(10)
![](/images/entities/<font color=)
deg.gif">,
![](/images/gifchars/beta2.gif)
ddle"> = 75.9610(10)
![](/images/entities/<font color=)
deg.gif">,
![](/images/gifchars/gamma.gif)
= 75.1740(10)
![](/images/entities/<font color=)
deg.gif">,
V = 663.94(6) Å
3,
Z =2,
Dcalcd = 2.066 Mg·m
-3, R1 = 0.0252 (all
data), wR2 = 0.0669. Crystal
data for C
15H
16N
3O
8CoV
2,
2: monoclinic space group
C2/
c (No. 15),
a = 30.4457(13) Å,
b = 11.3540(5) Å,
c =11.5836(5) Å,
![](/images/gifchars/beta2.gif)
ddle"> = 106.5390(10)
![](/images/entities/<font color=)
deg.gif">,
V = 3838.6(3) Å
3,
Z = 8,
Dcalcd = 1.824 Mg·m
-3, final R1 =0.0447 (all
data), wR2 = 0.1259.