1,2-Bis(4-ethynylphenyl)-1,2-diphenylethene (CAS 1240785-42-5) is a tetraphenylethylene building block carrying two ethynyl groups. It is supplied as a pale yellow powder with purity above 98% and serves as a ligand and monomer for macromolecules and covalent organic frameworks (COFs) that show photoluminescence and aggregation-induced emission (AIE).
Its tetraphenylethylene core has a propeller-like geometry that prevents π–π stacking, so the quenching normally caused by aggregation does not occur. The two terminal alkynes are highly reactive, allowing the molecule to take part in Sonogashira coupling and azide-alkyne cycloaddition (click chemistry) to build cross-linked COF and MOF networks.
Iodinating the ethynyl groups and then carrying out a KI-mediated, metal-free homo-polycoupling yields polydiynes whose refractive index can be tuned with UV light from n = 1.77 to 2.11.
- Synthesis of aggregation-induced emission (AIE) materials based on tetraphenylethylene.
- Ligand for building cross-linked covalent organic frameworks and metal-organic frameworks.
- Monomer for Sonogashira coupling and azide-alkyne click chemistry.
- Preparation of polydiynes with UV-tuneable refractive indices via metal-free homo-polycoupling.
- Development of photoluminescent macromolecules and conjugated polymers.
| Brand | Ossila |
|---|---|
| CAS number | 1240785-42-5 |
| Molecular formula | C30H20 |
| Purity | > 98% |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Pale yellow powder |
| Storage | — |
- Product code: B4131
- Molecular Weight: 380.49 g/mol
- Synonyms: 1,2-Bis(4-ethynylphenyl)-1,2-diphenylethylene
- Classification: Tetraphenylethylene building blocks, COFs, Photoluminescence, AIE
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