Chemistry Reference
In-Depth Information
Figure 4.27
Zigzag 1D structure of [Rh
2
(CF
3
CONH)
4
(1-MeC-O2,N3)]
n
Figure 4.28
Schematic illustration of [Cd
4
(
N7
-G-Et-en)
4
(H
2
O)
4
(SO
4
)
2
] highlighting the 1D
porous structure generated through sulfate bridging of G-quartets
Nucleobases and/or Anions as Bridging Ligands
Houlton and coworkers were able to isolate crystals of a polymeric compound based
on tetrameric [Cd
4
(G - Et - en)
4
(H
2
O)
4
] entities, which are assembled to form water-
lined pores by bridging sulfate anions
11
. Within the tetrameric assembly each Cd(II)
atom is coordinated by a tethered diamine function and N7 of an adjacent guanine
moiety. This arrangement leads to a cylindrical (square) polymer containing an
internal channel with a diameter of about 12
Å
′
(Figure 4.28) as we have described
before see Section 4.2.2 ).
