26437-48-9Relevant articles and documents
Complexation of tris(2-pyridyl)phosphine chalcogenides with copper(I) halides: The selective formation of scorpionate complexes, [Cu(N,N′,N″-2-Py3PX)Hal] (X = O, S and Se)
Artem'Ev, Alexander V.,Gusarova, Nina K.,Shagun, Vladimir A.,Malysheva, Svetlana F.,Smirnov, Vladimir I.,Borodina, Tatyana N.,Trofimov, Boris A.
, p. 1 - 6 (2015)
A series of copper(I) scorpionates, [Cu(N,N′,N″-2-Py3PX)Hal] (X = O, S and Se; Hal = Cl, I), has been synthesized in 67-88% yields by the reaction of tris(2-pyridyl)phosphine chalcogenides with Cu(I) halides (CH2Cl2, r.t., 10 min). These complexes were characterized by X-ray crystallography, NMR and UV-Vis techniques to reveal that the ligand coordinates with Cu(I) ion via three pyridine nitrogen atoms to form near-C3-symmetrical [Cu(N-C)3PX] cage. The halogen atoms are bonded with metal so that the latter adopts a distorted trigonal pyramidal geometry. The DFT computations confirm that the observable κ3-N,N′,N″-binding of the ligands is energetically more favorable than the alternative coordination modes, i.e. κ1-X-monodentate, κ2-N,N′- or κ2-N,X-bidentate and κ3-N,N′,X-tridentate.
Synthesis, crystal structures and magnetic properties of two iron (II) tris(pyridyl)phosphine selenides complexes
Hu, Xuecheng,Sun, Tingquan,Zheng, Chunyang
, p. 300 - 305 (2018)
We reported the synthesis of tris(pyridyl)phosphine selenide (TppSe) and tris(4-methylpyridin-2-yl)phosphine selenide (MeTppSe), which were prepared by a simple and straightforward one-pot method with red phosphorus in a KOH/DMSO suspension, and treatment of resulted phosphines with selenium in hot toluene. These compounds were characterized by mass spectroscopy, 1H, 13C and 31P NMR spectroscopies and the structure of MeTppSe was characterised by a single-crystal X-ray diffraction. Furthermore, The reactions of selenides with Fe(ClO4)2·6H2O afforded two new iron(II) mononuclear metal complexes [Fe(TppSe)2][ClO4]2·3DMF (1) and [Fe(MeTppSe)2][ClO4]2·2DMF (2). Detailed structural analyses and magnetic susceptibility measurements confirm no spin transition from low-spin to the high-spin state between 2 and 300?K in two iron(II) complexes.
The Wittig reaction with pyridylphosphoranes
Schroeder, Uwe,Berger, Stefan
, p. 2601 - 2604 (2000)
The Wittig reaction was studied by replacing one, two, or three phenyl rings in the triphenylethylidenephosphorane (8) with pyridyl rings, which were attached in the alpha position. It is shown that when using n- butyllithium as the base, the yield of the Wittig reaction is severely affected and it is proposed that the formation of a betaine salt adduct as intermediate suppresses the formation of oxaphosphetanes. In contrast, with sodium bis(trimethylsilyl)amide as the base, the yields are similar to the reaction with 8, although the Z-selectivity reaches values of over 18:1. The reactions have been monitored by 31p NMR spectroscopy and the position of the pyridyl ring in the oxaphosphetane 4a elucidated by ROESY NMR spectroscopy at low temperatures.
NEW REACTION INVOLVING OXIDATIVE C-PHOSPHORYLATION OF PYRIDINE BY PHOSPHINE
Dorfman, Ya. A.,Levina, L. V.
, p. 111 - 112 (1992)
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High performance solution-processed green phosphorescent organic light-emitting diodes with high current efficiency and long-term stability
Maheshwaran, Athithan,Sree, Vijaya Gopalan,Park, Ho-Yeol,Cho, Woosum,Kim, Hyein,Kumaresan, Raja,Kim, Youngkwang,Lee, Jae Chol,Song, Myungkwan,Jin, Sung-Ho
, p. 11569 - 11580 (2019)
In this study, we design and synthesize a new host and two new highly efficient green-emitting heteroleptic Ir(iii) complexes. These new materials are based on an amide-bridged, trifluromethyl-substituted, phenylpyridine skeleton with a longer alkyl chain as the main ligand, and on a phosphine oxide containing symmetrical dipyridinylphosphinate and asymmetrical phenyl(pyridin-2-yl)phosphinate as ancillary ligands. Their thermal, photophysical, electrochemical, and electroluminescent (EL) properties are fully investigated. The solution-processed green devices were fabricated using bis[5-ethylhexyl-8-trifluoromethyl-5H-benzo(c)(1,5)naphthyridin-6-one](dipyridinylphosphinate)iridium(iii) as dopant, and (4′-(9H-carbazol-9-yl)-[1,1′-biphenyl]-4-yl)di-o-tolylphosphine oxide (m-CBPPO1) and TPBi as hosts. The optimized devices containing a symmetrical-type ancillary ligand show excellent EL performance with a maximum current efficiency (CEmax) of 68.72 cd A-1 and a maximum external quantum efficiency (EQEmax) of 20.82% without compromising the color purity. This is one of the best reported CEmax values with high EQE for solution-processed phosphorescent organic light-emitting diodes (PHOLEDs). To the best of our knowledge, this is the first report on green solution-processed PHOLEDs with EQE over 20% by using phosphine oxide functionalized symmetrical type ancillary ligand. Furthermore, these devices with symmetrical Ir(iii) complexes show better device stability than that of asymmetrical Ir(iii) complexes, which is attributed to the formation of undesirable isomers in asymmetrical complexes.
Synthesis and chemistry of tris(2-pyridyl)phosphine and bis(2-pyridyl)phenylphosphine complexes of mercury(II) X (X = Br, Cl) and X-ray crystal structural determination of [HgBr2(PPh(2-py) 22)22]
Kharat, Ali Nemati,Tamaddoni Jahromi, Bahareh,Bakhoda, Abolghasem,Abbasi, Alireza
, p. 3783 - 3791 (2010)
Mercury(II) halide complexes [HgX2(P(2-py)3) 2] (X = Br (1), Cl (2)) and [HgX2(PPh(2-py) 2)2] (X = Br (3), Cl (4)) containing P(2-py)3 and PPh(2-py)2 ligands (P(2-py)
First example of the ?sp2-P bond formation in the reaction of red phosphorus with hetaryl halides
Malysheva,Artem'ev,Belogorlova,Korocheva,Gusarova,Trofimov
, p. 1307 - 1308 (2012)
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Iridium complex taking sulfo aromatic ring/aromatic heterocyclic phosphate compound as auxiliary ligand
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Paragraph 0034; 0035; 0041, (2018/09/21)
The invention relates to a novel iridium complex taking heterocyclic nitrogen as a main ligand and taking a sulfo aromatic ring/aromatic heterocyclic phosphate compound as an auxiliary ligand. The heterocyclic nitrogen and phosphorus-sulfur groups in iridium complex molecules are helpful for increasing the electron mobility of a material and regulating the luminescence color, injection and transmission of cavity and electrons can be balanced, a composite area of a carrier is widened, the equipment efficiency is increased, and the efficiency roll-off is reduced. The iridium complex has the advantages of simple synthesis, stable chemical properties, easy sublimation purification, and excellent equipment performance, and provides convenience for acquiring a high-efficiency organic electroluminescent device and an application of the high-efficiency organic electroluminescent device in the fields of illumination and display.
