Triphenylphosphine-catalyzed isomerization of alkynyl ketones in aqueous solution

An efficient isomerization of alkynyl ketones to(E,E)-diene ketones was developed.The reaction catalyzed by 20 mol% triphenylphosphine in aqueous media gave the desired products in good yields.

An efficient chemoselective synthesis of O-vinylaryl systems using acetylenic esters and dihydroxybenzenes in the presence of triphenylphosphine or alkyl isocyanides

The addition of 2,4-dihydroxyaceto(and benzo)phenone to propiolic ester is catalyzed by triphenylphosphine or tert-butyl isocyanide to form O-vinyl aryl derivatives in fairly good yields.

Phase separation morphology and mode II interlaminar fracture toughness of bismaleimide laminates toughened by thermoplastics with triphenylphosphine oxide group

Toughness improvement of bismaleimide(BMI)resin is very important for its application in composite materials.Blending

Triphenylphosphine and sodium iodide: a new catalyst combination to rival precious metal complexes in visible light photoredox catalysis

Photoredox catalysis has changed the landscape of modern synthetic organic chemistry by prompting a dramatic increase in research activity into reactions that proceed through free radical intermediates.

STUDIES ON THE EXTRACTION MECHANISM OF GOLD (Ⅲ) FROM HYDROCHLORIC ACID MEDIUM BY TRIPHENYLPHOSPHINE OXIDE (TPPO)

In studies on the extraction chemistry of gold, the extractants of alcohols, ethers, ketones and amines are widely used. The neutral extractants tributylphosphate (TBP) and trioctylphosphine oxide (TPPO) have been widely applied. A few experiments on the synthesis of solid complexes of transition metal ions with TPPO have been car-

Optimization of MgO/Al_2O_3 ratio for the maximization of active site densities in the Ni_2P/MgAlO catalysts for the hydrotreating reactions

The Ni_2P/MgAlO catalysts with different MgO/Al_2O_3 ratios were prepared by the phosphidation of corresponding Ni/Mg Al O catalysts with triphenylphosphine in liquid phase.It was found that the MgO/Al_2O_3 ratio affected the Ni_2P/MgAlO catalysts significantly.The Ni_2P/Mg Al O catalyst with the MgO/Al_2O_3 ratio of 3(w/w) exhibited the highly dispersed Ni_2 P particles(～9 nm) with the highest CO uptake(344 μmol/g)and thus the highest activities for the hydrotreating reactions.However,based on the CO uptakes on the used catalysts,the TOF values for the hydrodesulphurization of dibenzothiophene as well as those for the hydrogenation of tetralin on all the Ni_2P/MgAlO catalysts were respectively similar,indicating that the MgO/Al_2O_3 ratio did not affect the intrinsic activities of Ni_2 P supported on the MgAlO support for the hydrotreating reactions.

A New Humidity-Sensitive Material Based on PPBT Prepared with Palladium Complex Catalyst

Soluble Poly(propargyl benzoate) (PPBT) with (-conjugated structure was synthesized using a novel bis(triphenylphosphine)-bisacetylide palladium complex catalyst [Pd(PPh3)2(C(CCH2OOCPh)2] (PPB). An interdigital gold electrode was covered by screen printing films of doped PPBT (DPPBT) to prepare a resistance-type humidity sensor, which exhibits electrical response towards relative humidity (RH%) variations in the range 11%-96%. PPBT shows promise as a new humidity-sensitive material.

A Novel Humidity-Sensitive Material Based on PDEB with Nickel Complex Catalyst

Poly(p-diethynylbenzene) (PDEB) with improved solubility was synthesized using anovel catalyst bis(triphenylphosphine)bis(p-diethnylbenzene) nickel complex (Ni-C). A surfaceacoustic wave (SAW) delay line oscillator was covered by Langmuir-Blodgett (LB) films of re-sulting PDEB to prepare a humidity sensor, which was found to have high sensitivity and goodrepeatability. PDEB shows promise as a good humidity-sensitive material.