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DUT-5 (DUT ⇒ Dresden University of Technology) is the name of a material, which belongs to the class of metal-organic frameworks (MOFs). It's framework structure is an expanded version of the MIL-53 structure and consists of Al3+ metal centers and biphenyl-4,4'-dicarboxylate (BPDC) linker molecules. The DUT-5 structure consists of quasi-infinite inorganic [M-OH] chains, which are connected by the biphenyl-4,4'-dicarboxylate linkers to four neighboring inorganic chains. The structure contains diamond-shaped one-dimensional pores.

Structural analogs
The DUT-5 structure was initially synthesized with Al3+ as metal center, but other isostructural materials with metals having oxidation states of +II or +IV have also been prepared. Due to the tool-box like design of metal-organic framework materials, other organic molecules, which are structurally similar to biphenyl-4,4'-dicarboxylate, have also ben used as linker molecules for the synthesis of functionalized DUT-5 materials. The additional functional group at the functional biphenyl-4,4'dicarboxylate linker has been used for post-synthetic modification reactions or to alter the adsorption properties.