Bis 4-methylphenyl phenyl

Bis[4-methylphenyl Phenyl Tellurium Bromide] Oxide1 1.5 g (4.3 mmol) of 4-methylphenyl phenyl tellurium hydroxide chloride (or dichloridc) are dissolved in water and potassium bromide is added. The precipitate is collected and recrystallized from 600 ml of water m.p. 260°. 

When this reaction was carried out in methanol, when the diaryl tellurium oxide was combined with methanesulfonic acid, or when the disulfonate was heated at 140°, bis[4-methylphenyl phenyl methanesulfonate tellurium] oxide was obtained1. 

T. Noda, H. Ogawa, N. Noma, and Y. Shirota, A novel yellow-emitting material, 5,5"-bis 4-[bis(4-methylphenyl)amino]phenyl -2,2 5, 2"-terthiophene, for organic electroluminescent devices, Appl. Phys. Lett., 70 699-701, 1997. 

Bipolar Molecular Glasses. Recently, bipolar molecular glasses have been described that allow both injection of holes and electrons (Fig. 3.30). 2- 4-[bis(4-methylphenyl)amino]phenyl -5-(dimesitylboryl)thiophene (PhAMB-lT, 68) and 2- 4-[bis(9,9-dimethylfluorenyl)amino]phenyl -5-(dimesitylboryl)thiophene (F1AMB-1T, 69) show oxidation potentials of 0.62 and 0.58 V, and reduction potentials of —2.13 and —2.01 V vs. Ag/0.01 Ag+, respectively [145]. Oxidation as well as reduction leads to stable radical ions. With the conversion rules given above, the HOMO and LUMO levels can be estimated to be approximately at —5.3 and —2.8 eV. In comparison, for the bipolar compound 70, consisting of triarylamine and oxadiazole moieties, the values are —5.5 and — 2.7eV [129]. However, in this case no data on the stability of the radical ions are available. 

S-diethylaminophenyl)-l-phenyl-3-(i>-diethylaminostyryl)pyrazoline) (d) 4-(5H-dibezo[i , J]cyclohepten-5-ylidenemethyl) benzenamine [119544-18-2] (e) 4,4 -cyclohexylidenebis [N,IV-bis(4-methylphenyl)]benzenamine [58475-78-2] (l,l-bis(di-4-tolyl-aminophenyl)cyclohexane) (f)... 

The photochemistry of diphenyl- and bis(4-methylphenyl)iodonium salts has been investigated481,482. Diphenyliodonium halides (140, X = Cl, Br, I) exist as tight ion pairs in acetonitrile. Their photolysis gives almost exclusively iodobenzene by a homolytic cleavage from a charge-transfer excited state. In aqueous acetonitrile, however, the ion pairs are solvent-separated and substantial amounts of 2-, 3- and 4-iodobiphenyls (141) are formed in addition to iodobenzene (142), benzene (143), acetanilide (144) and biphenyl (145) (equation 126). In this medium the photodecomposition occurs via initial heterolysis of the molecule in its excited state, leading to iodobenzene and phenyl cation. 

Chloro-3-pyridylcarbonyl 4-methylphenyl tellurium similarly produced bis[4-methyl-phenyl] ditellurium in 60% yield5. 

A detailed analysis of the NMR spectra of the product obtained from phenyl tellurium bromide and 4-methylphenyl magnesium bromide revealed that diphenyl tellurium and bis[4-methylphenyl] tellurium had been formed in addition to the expected unsymmetrical compound. Pure 4-methylphenyl phenyl tellurium was obtained with stoichiometrically insufficient amounts of bromine and Grignard reagent5. 

Bis[4-methylphenyl] ditellurium, bis[4-methoxyphenyl] ditellurium, and bis[4-ethoxy-phenyl] ditellurium, but not diphenyl or bis[2-naphthyl] ditcllurium, reacted with 2-(phenyliodonio)-benzoates producing compounds with two vicinal aryltelluro substituents in the aromatic ring. The reactions are postulated to proceed via the thermally generated singlet benzyne and concerted addition of the diaryl ditellurium compounds. 

Methylphenyl phenyl tellurium bis[methanesulfonate] was isolated when the diaryl tellurium dibromide and silver methanesulfonate were reacted in dry benzene. After filtration, the reaction mixture was frozen and the frozen solvent removed in a vacuum. ... 

The reported preparation of 4-methylphenyl phenyl tellurium bis[t/-bromocamphorsulfo-nate] from the diaryl tellurium dibromidc and the silver sulfonate in acetone2 was found to be irreproducible. Only non-crystalline, non-uniform mixtures were obtained1. 

Photogeneration efficiencies of 4,4 -(9-oxo-9H-fluorene-2,7-diyl)bis(azo)-bis[N-(2-chlorophenyl)-3-hydroxy-2-naphthalenecaiboxamide] (AZO-FO) in single- and dual-layer configurations were measured by Umeda et al. (1990). The dual-layer materials contained 4-N,N-bis(4-methylphenyl)amino-a-phenyl-stilbene (MAPS) in the transport layer. Figure 5 shows the field dependencies. 

AODCST, 2-[4-bis(2-methoxyethyl)amino]benzylidene malononitrile PTPDac-BA2, copolymer, 65% wt N-(4-acryloyloxymethylphenyl)-N -phenyl-N,N -bis(4-methylphenyl)-[ 1,1 -biphenyl]-4,4 -diamine, 35% wt A-butylacetate DOP, dioctyl phthalate DRl-DCTA, 4,4 -di(carbazol-cl-yl)-4"-(2- N-ethyl-N-[4-(4-nitrophenyldzo)phenyl]amine ethoxy)-triphenylamine other abbreviations are defined in the text and Figures, quantum effieieney of mobile charge photogeneration has been estimated where necessary, °a relative static dielectric constant of 3 and a linear electro-optic response have been assumed. 

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