50777-77-0

Upstream product

• 34825-99-5 2-(diphenylphosphanyl)benzonitrile 
• 50777-76-9 (2-formylphenyl)(diphenyl)phosphine 
• 1079-66-9 chloro-diphenylphosphine 
• 2042-37-7 o-cyanobromobenzene 
• 50777-74-7 2-[2-(diphenylphosphinyl)phenyl]-1,3-dioxolane 

Downstream Products

• 81073-06-5 ((2-hydroxymethyl)phenyl)diphenylphosphine 

Relevant academic research and scientific papers

The Trityl-Cation Mediated Phosphine Oxides Reduction

Reduction of phosphine oxides into the corresponding phosphines using PhSiH3 as a reducing agent and Ph3C+[B(C6F5)4]? as an initiator is described. The process is highly efficient, reducing a broad range of secondary and tertiary alkyl and arylphosphines, bearing various functional groups in generally good yields. The reaction is believed to proceed through the generation of a silyl cation, which reaction with the phosphine oxide provides a phosphonium salt, further reduced by the silane to afford the desired phosphine along with siloxanes. (Figure presented.).

NHC-Catalyzed Synthesis of Benzazole-Phosphine Ligands under an Air Atmosphere

An efficient strategy for the synthesis of benzazole-phosphine ligand precursors via N -heterocyclic carbene catalyzed aerobic oxidative cyclization reaction has been performed. The reaction displays broad functional group tolerance and high atom economy,

Dual encapsulation of electron transporting materials to simplify high-efficiency blue thermally activated delayed fluorescence devices

The charge flux balance and interfacial optimization are two core concerns when simplifying blue thermally activated delayed fluorescence (TADF) diodes, which reflects the more stringent demand on carrier transporting materials (CTM) as the embodiment of the contradiction between charge transportation and quenching suppression with the opposite requirement on intermolecular interactions. Herein, phenylbenzimidazole (PBI) was used as the core substituted with two diphenylphosphine oxide (DPPO) groups to form six dual-encapsulated charge-exciton separation (CES)-type electron transporting materials (ETM) with the collective name of xyPBIDPO. Through tuning the substitution positions of DPPO group, its two functions of resonance and steric effects were integrated and optimized to enhance charged moiety encapsulation without cost of reducing electroactivity. As the result, among xyPBIDPO, mmPBIDPO successfully realizes the balance of favorable electrical performance and interfacial interaction suppressions in virtue of its doubled mesa-substitution structure and roughly symmetrical configuration, rendering the good electron affinity of 2.8 eV, the high electron mobility by the level of 10-6 cm2 V-1 s-1 and effective PBI-core encapsulation. Consequently, mmPBIDPO was used to extremely simplify the blue TADF devices with the state-of-the-art performance from trilayer and quadruple-layer configurations, such as the maximum external quantum efficiency (EQE) beyond 20% and improved efficiency stability. This work not only established a solid example of CES-type ETM for high-performance simple structured blue TADF devices but also provided the direction of developing this kind of materials in the future.

The endocyclic restriction test: Determination of the transition-structure geometry for the transfer of oxygen from N,N-dialkylhydroxylamines to triarylphosphines

The transfers of oxygen from nitrogen to phosphorus in the conversions of 1 to 2 and 3 to 4 are shown by kinetic, solvent-labeling, and double-labeling criteria to be intramolecular reactions. This information in conjunction with the stabilities of 13 and 14 is taken to rule out the mechanisms of classic linear SN2 substitutions at oxygen or nitrogen, biphilic insertion, or a radical chain reaction and to favor reactions via a 10-P-5 species (18). These results appear to provide the first experimental demonstration that oxygen can be transferred at an oblique angle.

A novel convenient synthesis of aryl phosphines containing reactive functional groups

A convenient method is described for the preparation of Ph2PC6H4COOH-2 (2) and Ph2PC6H4CHO-2 (5).

ESTERS OF (TRIARYLPHOSPHORANYLIDENE)CARBAMIC ACID FOR EFFECTING DIURESIS

This disclosure describes novel esters of (triarylphosphoranylidene) carbamic acid which are useful as diuretic agents.