Chemistry Reference
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Fig. 3.38
X-ray crystal structure of the 2D Q[8]/Sr
2
+
network:
a
an overall view;
b
an eight-
Q[8]-membered ring isolated from the 2D network; and
c
and
d
the superimposed network sheets
in exact order with tubular channels constructed from the eight-Q[8]-membered rings. Adapted
from Ref. [
59
] with permission from The Royal Society of Chemistry
Fig. 3.39
X-ray crystal structures of
a
the unit of four Q[8] molecules with two different host-
guest inclusion complexes;
b
the inclusion complex b with vertically parallel included Hyb mol-
ecules;
c
the inclusion complex
c
with parallel included Hyb molecules that recline in the cavity
of the host Q[8];
d
the labeled cesium unit; and
e
the 3D framework with different nanochannels
molecules in the four-Q[8]-molecule unit, one
b
complex, and two
c
complexes.
In turn, both opening portals of the host Q[8] coordinate with cesium cations; each
portal coordinates with one cesium cation in the
b
complex and each portal coor-
dinates with two cesium cations in the
c
complex. Thus, the crystal structure of
this compound has a novel 3D framework with different nanochannels constructed
from the Q[8]-based inclusion complexes (Fig.
3.39
e).
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