676456-02-3

Basic information

• Product Name: Phosphine oxide, tris(4-ethynylphenyl)-
• CAS NO: 676456-02-3
• Molecular Formula: C24H15OP
• Molecular Weight: 350.356
• Mol File: 676456-02-3.mol

Chemical Properties

• CAS DataBase Reference: Phosphine oxide, tris(4-ethynylphenyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Phosphine oxide, tris(4-ethynylphenyl)-(676456-02-3)
• EPA Substance Registry System: Phosphine oxide, tris(4-ethynylphenyl)-(676456-02-3)

Safety Data

• Hazardous Substances Data: 676456-02-3(Hazardous Substances Data)

Upstream product

• 16116-78-2 (4-bromophenyl)(trimethylsilyl)acetylene 

Downstream Products

• 1293287-04-3 C₉₀H₉₃O₄P 
• 1293287-09-8 C₁₁₄H₁₄₄N₃OP 
• 1269831-61-9 C₆₀H₅₇O₁₀P 

Relevant articles and documents

Phosphine oxide-based conjugated microporous polymers with excellent CO2 capture properties

Three novel phosphine oxide-based conjugated microporous polymers TEPO-1, TEPO-2 and TEPO-3 are designed and synthesized, which are constructed using the phosphine-based building unit tris(4-ethynylphenyl)phosphine oxide with linkers tris(4-ethynylphenyl)

Synthesis, photophysical, and two-photon absorption properties of elongated phosphane oxide and sulfide derivatives

A series of rod-shaped and related three-branched push-pull derivatives containing phosphane oxide or phosphane sulfide (PO or PS)a-as an electron-withdrawing group conjugated to electron-donating groups, such as amino or ether groups, with a conjugated rod consisting of arylene-vinylene or arylene-ethynylene building blocksa-were prepared. These compounds were efficiently synthesized by a Grignard reaction followed by Sonogashira coupling. Their photophysical properties including absorption, emission, time-resolved fluorescence, and two-photon absorption (TPA) were investigated with special attention to structure-property relationships. These fluorophores show high fluorescence quantum yields and solvent-dependent experiments reveal that efficient intramolecular charge transfer occurs upon excitation, thereby leading to highly polar excited states, the polarity of which can be significantly enhanced by playing on the end groups and conjugated linker. Rod-shaped and related three-branched systems show similar fluorescence properties in agreement with excitation localization on one of the push-pull branches. By using stronger electron donors or replacing the arylene-ethynylene linkers with an arylene-vinylene one induces significant redshifts of both the low-energy one-photon absorption and TPA bands. Interestingly, a major enhancement in TPA responses is observed, whereas OPA intensities are only weakly affected. Similarly, phosphane oxide derivatives show similar OPA responses than the corresponding sulfides but their TPA responses are significantly larger. Finally, the electronic coupling between dipolar branches promoted by common PO or PS acceptor moieties induces either slight enhancement of the TPA responses or broadening of the TPA band in the near infrared (NIR) region. Such behavior markedly contrasts with triphenylamine-core-mediated coupling, which gives evidence for the different types of interactions between branches.

Novel fluorophores: Efficient synthesis and photophysical properties

The synthesis of new donor-acceptor acetylene-bridged compounds was realized via organophosphorus reactions and Sonogashira couplings. These systems exhibit high fluorescence quantum yields, and excitation induces very efficient charge redistribution in t