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Fig. 3.14
X-ray crystal structure of
a
Nd
3
+
/Q[5]-based 2D coordination polymers;
b
detailed
coordination of Q[5] molecules and Nd
3
+
(Nd1, Nd2, and Nd3) cations;
c
overview of the
[ZnCl
4
]
2
−
-based honeycomb framework;
d
overview of the Nd/Q[5]-based supramolecular
assembly in the presence of; and
e
a Nd
3
+
/Q[5]-based linear dimensional coordination polymer
in between. The solid-state packing of these complexes shows the formation of
open channels occupied by counter ions and noncoordinating water molecules. In
the (HO)
10
Q[5]/K
+
2D network (Fig.
3.15
a, b), each (HO)
10
Q[5] molecule coor-
dinates with four potassium cations, two of which (K1 and K2) fully cover both
portals of the (HO)
10
Q[5] molecule. Meanwhile, K1 and K2 also coordinate two
oxygens (O19A and O16A) of the hydroxyl group of neighboring (HO)
10
Q[5]
molecules, respectively. The other two K
+
cations (K1A and K2A) coordi-
nate to two oxygens (O19 and O16, respectively) of the hydroxyl groups on the
(HO)
10
Q[5] molecule, resulting in the formation of the (HO)
10
Q[5]/K
+
-based 2D
networks. Moreover, the staggered arrangement of these 2D networks along the
c
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