224311-51-7, Name is 2-(Di-tert-Butylphosphino)biphenyl, molecular formula is C20H27P, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 224311-51-7, Product Details of 224311-51-7
Six aryl Pd(II) bromide complexes based on perylene diimide derivative (Ar) and phosphine mixed-ligands are successfully synthesized by directly oxidative addition of Ar?Br to the Pd(0) precursor. These complexes with the general formulas ArPdBr(PCy3)2 (PCy3 = tricyclohexylphosphine; Pd1?Pd3) and [ArPdBr(TXP-2,4)]2 (TXP-2,4 = tri-2,4-xylylphosphine; Pd4?Pd6) are stable and can be handled in air at room temperature. By employing the Pd(II) complexes as initiators, Suzuki catalyst transfer polymerization (SCTP) of AB-type fluorene monomer is investigated for preparing polyfluorenes (PFs) with the defined end group. Complexes Pd4?Pd6 with auxiliary TXP-2,4 ligand can initiate polymerization of AB-type fluorene monomer at room temperature, while higher polymerization temperature is required for Pd1?Pd3 with alkyl phosphine PCy3. The obtained polymers are analyzed by matrix-assisted laser desorption ionization-time-of-flight mass spectrometry, which confirms that the Ar group is appended to the terminus of the polymer chain. Moreover, PFs prepared by Pd4?Pd6-catalyzed SCTP bear precisely the Ar group on one chain end and 4-tert-butylphenyl end-capping group on the opposite end, which indicates that Pd4?Pd6 with the bulky TXP-2,4 exhibit better catalytic performance in SCTP. Photoluminescence spectra of the obtained polymers show a dual or a blue emission resulting from the difference of the molecular weight. (Figure presented.).
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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate