Chemistry Reference
In-Depth Information
Fig. 3.19
X-ray crystal structures of a 1D polymer through direct coordination of Q[6] mol-
ecules and Sr
2
+
cations:
a
side view and
b
top view;
c
top view and
d
side view of a 2D network
constructed from UO
2
/C10;
e
stacking of 1D polymers and 2D networks;
f
two centrosymmetric,
tetranuclear clusters
Another instance of a 1D coordination polymer was observed in the reaction of
lanthanide nitrate salts with 2-sulfobenzoic acid in the presence of Q[6] under
hydrothermal conditions. This reaction yields a series of Q[6]/Ln
3
+
1D polymeric
complexes of columnar shape, which have been crystallographically character-
ized. These 1D polymeric complexes are of two isomorphous groups, as shown in
Fig.
3.20
c (Ln
=
La, Ce) and Fig.
3.20
e (Ln
=
Eu, Dy, Er, and Yb). These com-
pounds all comprise carboxylate-bridged dinuclear units connecting the Q[6] mol-
ecules through lanthanide-carbonyl coordination. The units differ in that sulfonate
Search WWH ::
Custom Search