Metal-Organic Coordination Polymers as Precursors of Oxides

3 Metal-Organic Coordination Polymers as Precursors of Oxides 

Recently, there are several interesting studies exploring the MOCPs as precursors of different nanosized simple and mixed oxides [13]. 

A nanorod morphology of ZnO has been obtained by calcination of [Zn(3-bpdh) (NO ) [114], [Zn(p-3-bpdh)(N02)J [115],and [Zn(4,4 -bipy)ClJ [116] compounds 3-bpdh = 2,5-bis(3-pyridyl)-3,4-diaza-2,4-hexadiene 4,4 -bipy = 4,4-bipyridine). Moreover, the calcination of 2D MOCP, [Zn(ox)(4,4 -bipy)] ox=Cfi ) produces ZnO radial nanoneedles [1171. Thermal decomposition of 3D MOCP [Zn(L2)] H2L2 = 4-[(lH-imidazol-4-yl)methylaminolbenzoic acid) at different temperatures shows that an increase in the thermolysis temperature influences the morphology of the derived oxides and changes it from spheres into nanorods [1181. 

The thermal decomposition of Co-BDC coordination polymer H2BDC = 1,4-ben-zenedicarboxylic acid) leads to hierarchical porous CO3O43D superstructures, assembled from 2D sheets, densely composed of many uniform nanoparticles [119]. Depending on the calcination temperature, 0036 5 or CoO were obtained from [Co(ox)-2.5H20] compound [120]. 

The calcination of titanium-containing Prussian blue analog, KQ25Ti[Fe(jg75(CN) ]-bH O, led to microstructural nanoporous cubes of mixed titanium-iron-based oxides, Ti02-Fe203 that retained the precursor s cubic morphology [121]. 

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