1,3,5-Tris(4-aminophenyl)benzene, commonly abbreviated TAPB (CAS 118727-34-7), is a tritopic amine building block for covalent organic frameworks (COFs). Its structure consists of a central benzene ring bearing three 4-aminophenyl arms at the meta-positions, giving a trigonal geometry that suits cross-linked, porous polymer networks. Ossila supplies it at >97% purity as a pale brown to brown powder or crystals.
The amine groups take part readily in polycondensation reactions. Condensing TAPB with naphthalene-1,4,5,8-tetracarboxylic dianhydride gives the polyimide framework PAF-120, which is thermally and chemically robust and adsorbs C2H2 selectively over C2H4 and CO2 over N2. A three-component imine COF built from TAPB, 2,5-divinylterephthaldehyde and biphenyl dialdehyde captures bisphenol A and bisphenol S through hydrogen bonding and π–π interactions.
TAPB is also relevant to organic electronics: thin films of the 2D TAPB–TFB COF show strong photoconductivity, with a charge scattering time above 70 fs at room temperature and a charge carrier mobility of 165 ± 10 cm2 V–1 s–1.
- Synthesis of imine, polyimide and β-ketoenamine covalent organic frameworks as a trigonal linker.
- Preparation of porous frameworks for CO2 adsorption and gas separations such as C2H2/C2H4 and CO2/N2.
- Fabrication of fluorescent COFs for nitroaromatic sensing.
- Development of COF adsorbents for removing bisphenol pollutants.
- Research on semiconducting 2D COF thin films and COF-modified perovskite solar cells.
- Cross-linking of polyimide gels.
| Brand | Ossila |
|---|---|
| CAS number | 118727-34-7 |
| Molecular formula | C24H21N3 |
| Purity | > 97% |
| Category | — |
| Pack sizes | 1 g, 5 g, 10 g |
| Physical form | Pale brown to brown powder/crystals |
| Storage | — |
- Product code: B4511
- Molecular Weight: 351.45 g/mol
- Synonyms: TAPB, 5'-(4-aminophenyl)-[1,1':3',1''-terphenyl]-4,4''-diamine
- Classification / Family: Terphenyls, Polyamines COF ligands
- Melting Point: Tm = 263 °C (lit.)
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