The world of chemical synthesis and material science is constantly seeking versatile building blocks that can unlock new functionalities and performance characteristics. 2,5-Dihydroxyterephthalic Acid (CAS 610-92-4) stands out as one such compound, offering a unique combination of chemical features that make it invaluable, particularly in the realm of Metal-Organic Frameworks (MOFs).

Understanding the Chemical Structure and Properties

2,5-Dihydroxyterephthalic Acid is an aromatic dicarboxylic acid. Its structure features a benzene ring substituted with two hydroxyl (-OH) groups at positions 2 and 5, and two carboxylic acid (-COOH) groups at positions 1 and 4. This specific arrangement (C8H6O6, MW 198.13) dictates its chemical behavior and suitability for complex synthesis:

  • Dicarboxylic Acid Functionality: The presence of two carboxylic acid groups allows it to act as a bidentate ligand, readily coordinating with metal ions. This is the fundamental principle behind its use in constructing the extended network structures of MOFs.
  • Hydroxyl Groups: The hydroxyl groups offer potential sites for further functionalization or can participate in hydrogen bonding within the MOF structure, influencing pore environments and guest molecule interactions.
  • Aromatic Nature: The rigid benzene ring provides structural integrity and thermal stability to the resulting MOF framework.
  • Solubility: Typically soluble in polar organic solvents like DMF and DMSO, it can be processed under conditions suitable for MOF synthesis.

Applications Beyond MOFs?

While its primary fame comes from being a linker for MOFs like MOF-74/CPO-27, MIL-53(Fe)-(OH)2, and UIO-66-(OH)2, the inherent chemical versatility of 2,5-Dihydroxyterephthalic Acid suggests potential in other areas of material science. Its aromatic dicarboxylic acid nature could make it a candidate as a monomer for certain specialty polymers, as a component in advanced coatings, or even in niche electronic materials where aromatic structures with reactive functional groups are beneficial. Researchers are continually exploring new applications for such unique chemical intermediates.

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