User:Canucksplayer/sandbox CPO-27

CPO-27 (CPO ⇒ Coordination polymer of Oslo), also called MOF-74, M2(dhtp) or M2(dobdc), is a material in the class of metal-organic frameworks (MOFs). Metal-organic frameworks are crystalline materials, in which metals are linked by ligands (so-called linker molecules) to form repeating coordination motives extending in three dimensions. The CPO-27 structure is build up from divalent metal centers (M2+), which are connected by 2,5-dioxybenzene-dicarboxylat (dobdc), alternatively also called 2,5-dihydroxyterephthalate (dhtp), linker molecules. The resulting framework structure contains hexagonal, honeycomb-like pores extending in one dimension. After the synthesis and in air atmosphere, one solvent molecule or one water molecule, respectively, is coordinated to each metal center and can be removed at elevated temperatures or in vaccuum. After the removal, the coordination site at the metal center can remain uncoordinated, which is called coordinatively unsaturated site (CUS), and can be reached by other molecules for direct metal-substrate interactions.

Monometallic CPO-27 analogs
The CPO-27 structure was synthesized mainly with divalent 3d transition metals, which have similar ionic radii.

Mixed-metal CPO-27 analogs
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Further mixed-metal CPO-27 materials were synthesized with up to ten different metals. In these materials, also other earth alkaline metals (Ca, Ba, Sr) apart from Mg have been incorporated into the CPO-27 structure, which have not been reported as monometallic analog so far.