Ossila 1,1,2,2-Tetrakis(4-ethynylphenyl)ethene B4501

1,1,2,2-Tetrakis(4-ethynylphenyl)ethene (TEPE, CAS 4863-90-5) is a symmetrical, butterfly-shaped bridging linker used to construct covalent organic frameworks (COFs) and conjugated polymers. Its structure consists of four 4-ethynylphenyl arms connected through a central ethene double bond, and it is supplied by Ossila at a purity above 98% as a beige to light brown powder or crystals.

As a tetraphenylethene derivative, TEPE carries aggregation induced emission (AIE) behaviour: it is non-emissive at low concentrations but becomes emissive on aggregation. This property makes TPE-based materials useful as chemosensors, stimuli-responsive nanomaterials and active layers in OLEDs.

TEPE readily undergoes homopolycyclotrimerization to give hyperbranched polyTPE with high molecular weight, good thermal stability and good solubility. This homopolymer acts as a fluorescent sensor for explosives, with a quenching constant reaching 758,000 M−1. TEPE-derived frameworks have also been reported for visible-light photocatalytic H2O2 production (3009 μmol g-1 h−1), CO2 capture of 5.35 mmol g−1 at 273 K, Fe3+ sensing, antibacterial activity and supercapacitor electrodes.

• Linker for synthesising cross-linked covalent organic frameworks and conjugated porous polymers.
• Monomer for hyperbranched polyTPE used as a fluorescent chemosensor for explosives.
• Building block for conjugated organic polymers that photocatalytically produce H2O2 from H2O and O2 under visible light.
• Precursor for fluorine-rich porous polymers studied for carbon dioxide adsorption.
• Component of luminescent conjugated macrocycle polymers for sensing Fe3+ ions and organic dyes.
• Linker for imine-bridged COFs evaluated in antibacterial and supercapacitor studies.

• Product code: B4501
• M​olecular Weight: 428.53 g/mol
• Synonyms: TEPE, TEE, TPE, TETPE, TPET, Tetrakis(4-ethynylphenyl)ethene
• Classification / Family: Ethenes, Ethynyls, COF ligands
• Melting Point: Tm = 155.5 °C (lit.)

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