H.-G. Jin et al. / Inorganic Chemistry Communications 23 (2012) 25–30
29
O4c) from three AIP2− ligands and the other two (O6, O7a) from one OX2
− ligand to form a distorted bicapped trigonal prism coordination geom-
etry (Fig. 3a). The Er\O average distance is 2.360 Å (ranging from 2.207
to 2.605 Å) (Table S2), which is similar to the reported Er\O bond dis-
tances [3(c)]. In compound 3, one carboxylate group of AIP2− is μ2-
bridged to two Er3+ ions and the other one adopts μ2-η1:η2 mode to
bridge another two Er3+ ions, resulting in the formation of 2-D layer-
like structure (Figure S3). From Figure S3, obviously, 2-D layer is also
viewed as the repeated arrangement of four edge-sharing multi-
membered rings (namely one four-membered R4Er2O2, two sixteen-
of Guangdong Province (grant no. 2010B031100018), the N.S.F. of
Guangdong Province (grant no. 9251063101000006) and Science and in-
formation Technology of Guangzhou Municipal (grant no. 11S72090055).
Appendix A. Supplementary material
X-ray crystallographic file in CIF format for compound 1 is avail-
able in supporting material section. The CCDC reference numbers
are 862867, 862868 and 862869 for compounds 1, 2 and 3, respec-
tively. Copy of the data can be obtained free of charge on application
to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK [Fax: int code
+44(1223)336-033; E-mail: deposit@ccdc.cam.ac.uk]. Supplementa-
1016/j.inoche.2012.05.040.
membered R16Er2O4C10, and one eight-membered R8
rings) in bc
Er2O4C2
plane. Similarly, through μ2-bridging coordination interaction of OX2−
ions, these 2-D layers are further assembled into a 3-D pillar-layer frame-
work as indicated in Fig. 3b. To better understand the structure of 3, the
simplified analysis approach was employed, which is standard procedure
for reducing multidimensional structures to a simple node-and-linker. As
discussed above, each Er3+ in 3 is connected to four AIP2− and one OX2−
ligand, each AIP2−/OX2− ion bridges four/two Er3+ centers. If four-
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We are grateful to the National Natural Science Foundation of China
(nos. 91122008 and 21071056), Science and Technology Planning Project