Coordination polymers dimensionality

Zinc carboxylate interactions have been exploited as part of a fluorescent molecular sensor for uronic acids. The sensors feature two interactions coordination of the carboxylate to the zinc and a boronic acid diol interaction.389 Photoluminescent coordination polymers from hydrothermal syntheses containing Zn40 or Zn4(OH)2 cores with isophthalate or fumarate and 4,4 -bipyridine form two- and three-dimensional structures. Single X-ray diffraction of both dicarboxylates identified the network structure.373... 

Bis(but-3-enoato)zinc, a two-dimensional coordination polymer, has been polymerized in the solid state by irradiation of a crystalline sample resulting in isotactic zinc poly(but-3-enoate).393... 

Special emphasis has been laid on structural studies of Cd compounds with dicarboxylic acids, because these combinations form coordination polymers of differing dimensionalities depending on the carboxylate component and on coligands coordinated to Cd. The simplest compound of this type, namely Cd oxalate CdC204, adopts a 3-D framework structure, with CdOe octahedra linked by oxalate groups.272 Further interesting structures containing Cd, oxalate and other components have been described recently.273,274... 

The introduction of cyano groups in the 3-position of diketimiminate ligands greatly increased the crystallinity of their complexes (Figure 49, 95), due to the formation of one-dimensional coordination polymers. A new f3-oxo-<5-diimine ligand, in turn, allowed the synthesis of a bimetallic organozinc complex 96, by the same methods that had been used for the syntheses of the mononuclear species 92-94.154... 

The placement of four pyridyl groups on the upper rim of the resorcin[4]arene cavitands was followed by the addition of Pd(II) ions to generate a monomeric molecular receptor with hydrophobic binding sites <00TL3113>. The treatment of 2,4,6-rm[(4-pydrinyl)methyl-sulfanyl]-l,3,5-triazene (tpst) with silver to form a single-stranded one-dimensional coordination polymer, [Ag7(tpst)(C104)2(N03)5(dmf)2] , which contains nanotubes... 

Finally, the recent synthesis of a series of two-dimensional isocyanide coordination polymers containing rhodium(I) could lead to the development of a new area of metal-containing polymers (50-52). 

Figure 9.30 The dimensionality of the coordination polymer is dependent upon the connectivity and shape of the ligands and the distribution of the vacant coordination sites on the metal or SBU.

The topologically simplest networks are ID—>1D parallel networks but few are known for coordination polymers. A hydrogen bonded example is the co-crystal of 4,4 -dipyridylpropane (9.12) and 4,4 -sulfonyldiphenol (9.13), Figure 9.36. One dimensional strands can also give rise to two dimensional... 

One of the first reports on these materials deals with the reaction of [Rh(CO)2Cl]2 with aromatic diisocyanides to produce two-dimensional (2D) coordination polymers with stacked layer arrangements, as established from their X-ray powder diffraction patterns (Fig. 2).14-16 Related 2D layered... 

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