4,4''-p-Terphenyldicarboxaldehyde (TPDA, CAS 62940-38-9) is an aldehyde-functional linker used to build covalent organic frameworks (COFs). Its rigid, linear terphenyl backbone carries an aldehyde group at each end, so it can join with amine building blocks to form cross-linked framework networks. It is supplied at >98% purity.
The aldehyde groups react readily, which makes TPDA a convenient choice for Schiff base condensation. Reacting it with 5,10,15,20-tetrakis(4-aminophenyl)-21H,23H-porphyrin (Tph), for example, yields Tph-TPDA-COF, a framework with strong photocatalytic activity. In the 2D framework TCPP-TPDA-COF, porphyrin active sites work together with the π-electron network of the terphenyl units, which serves as a charge transport pathway. This enabled oxygen-tolerant PET-RAFT polymerization in water under visible light of several wavelengths.
Published work using TPDA-based COFs covers electrochemiluminescence, photocatalysis, oxygen reduction reactions, iodine adsorption and the detection and removal of water pollutants.
- Linker for synthesising covalent organic frameworks by Schiff base condensation with amine monomers.
- Building porphyrin-based COF photocatalysts, including systems for visible-light PET-RAFT polymerization in water.
- Preparing COFs for highly efficient electrochemiluminescence.
- Making COF supports for oxygen reduction reaction catalysts.
- Developing COFs for iodine adsorption.
- Researching COF materials for detecting and removing pollutants from water.
| Brand | Ossila |
|---|---|
| CAS number | 62940-38-9 |
| Molecular formula | C20H14O2 |
| Purity | >98% |
| Category | — |
| Pack sizes | 1 g, 5 g |
| Physical form | White to off-white powder to flakes to fibers/crystals |
| Storage | — |
- Product code: B3821
- Molecular Weight: 286.32 g/mol
- Synonyms: TDA, TPDA, [1,1':4',1''-Terphenyl]-4,4''-dicarboxaldehyde
- Classification / Family: Terphenyl, COF ligands
- Melting Point: 210 – 213 °C
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