1,2,4,5-Tetra((4-aminophenyl)ethynyl)benzene, often abbreviated TAEB (CAS 2375652-88-1), is an amine-functionalized bridging ligand used to build covalent organic frameworks (COFs). Supplied at >98% purity as a green to dark yellow powder or crystals, it is aimed at researchers developing porous materials for gas uptake and photocatalysis.
Structurally, TAEB consists of a central benzene ring carrying four ethynyl bridges at the 1,2,4,5-positions, each ending in a 4-aniline group. This gives a highly symmetrical, cross-shaped building block (tecton). Its outer amino groups readily condense with aldehydes or acids, forming imine or amide linkages that knit the molecules into microporous frameworks.
The compound is made by Sonogashira cross-coupling of 4-ethynylaniline with 1,2,4,5-tetrabromobenzene, using Pd(PPh3)4 and copper iodide as catalysts. It belongs to the tetraethynylbenzene family of COF ligands.
- Construction of microporous covalent organic frameworks through imine or amide linkages.
- Synthesis of COF materials for gas uptake studies.
- Development of framework-based photocatalysts.
- Use as an amine ligand in cross-linked COF and MOF networks.
- Preparation of crystalline COF films and 2D COF structures.
| Brand | Ossila |
|---|---|
| CAS number | 2375652-88-1 |
| Molecular formula | C38H26N4 |
| Purity | >98% |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Green/Dark Yellow powder/crystals |
| Storage | — |
- Product code: B4021
- Molecular Weight: 538.64 g/mol
- Synonym: TAEB
- Classification / Family: Tetraethynylbenzene, COF ligands
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