Two novel Sb(III) and Sb(V) peri-substituted acenaphthene phosphorus−antimony compounds were prepared. The compound, 1, was prepared via reacting the organolithium precursor with dichloro(p-tolyl)Stibine, 2 by chlorination of 1. Both 1 characterized multinuclear (1H, 13C 31P) NMR spectroscopy, their molecular structures resolved single-crystal X-ray diffraction. show a dative P−Sb interaction a...

The use of the congested aryl bromide 2-bromo-1,3-dichlorobenzene as coupling partner allows to modify the regioselectivity of the arylation of 3-substituted thiophene derivatives in favour of carbon C5. The coupling of this aryl bromide with a variety of 3-substituted thiophenes gave in all cases the desired 5-arylation products in moderate to good yields using only 0.5 mol % of a phosphine-fr...

We demonstrate a low cost, phosphine-free route to synthesize CdSe quantum dots (QDs) by heating the mixed precursors of Se and Cd up to 260 C. The as-synthesized CdSe QDs are characterized by using UV-visible absorption spectroscopy, high resolution transmission electron microscopy, X-ray diffractrometry, and EDX analyses. The CdSe QDsensitized TiO2 films of solar cells has been fabricated by ...

The traditional Staudinger/aza-Wittig reaction represents one of the most powerful tools for imine formation. However, this multistep procedure, sacrificial phosphine has to be used, resulting in difficulties purification process and waste disposal at same time. Here, we report a redox-neutral azide–alcohol imination methodology enabled by base-metal nickel PN3 pincer catalyst. one-step, waste-...

A Pd-catalyzed single-step C-H arylation of dioxythiophene derivatives bearing unprotected reactive functional groups (-OH, -COOH, -N3) in a phosphine-free manner has been developed. Various dioxythiopene-based oligoarenes with extended π-conjugation are obtained with good yields (up to 90%). These oligoarenes display suitable optical properties (absorption and emission maxima, quantum yields) ...

The Os(II) atom in the title compound, [OsCl(2)(C(8)H(12))(C(18)H(15)P)(2)], is located on a crystallographic twofold axis and adopts a distorted octa-hedral coordination geometry. The two triphenyl-phosphine ligands are trans to each other, while the two chlorine ligands are cis-disposed. The coordination is completed by the cyclo-octa-diene (COD) ligand with bonding to the two olefin double b...

Despite the developments in the wet chemical synthesis of high-quality semiconductor nanocrystals (NCs) with diverse elemental compositions, telluride NCs are still irreplaceable materials owing to their excellent photovoltaic and thermoelectric performances. Herein we demonstrate the dissolution of elemental tellurium (Te) in a series of alkylamides by sodium borohydride (NaBH4) reduction at r...

Phosphazene superbases are efficient organocatalysts for the metal-free catalytic hydrosilylation of carbon dioxide. They react with CO2 to form the respective phosphine oxides, but in the presence of hydrosilanes, CO2 can be selectively reduced to silyl formates, which can in turn be reduced to methoxysilanes by addition of an extra loading of silanes. Activities reach a TOF of 32 h(-1) with a...

By reaction of 1,4-dipotassio-1,1,4,4-tetrakis(trimethylsilyl)tetramethyltetrasilane with PbBr(2) in the presence of triethylphosphine a base adduct of a cyclic disilylated plumbylene could be obtained. Phosphine abstraction with B(C(6)F(5))(3) led to formation of a base-free plumbylene dimer, which features an unexpected single donor-acceptor PbPb bond. The results of density functional comput...

In their article McDaniel et al. (2005) presented three case studies, one involving an evaluation by Sciences International, Inc. (Pepelko et al. 2004), of which I am the president and CEO. This case study was related to the reregistration of phosphine by the U.S. Environmental Protection Agency (EPA). McDaniel et al. (2005) make two principal accusations: a) that I improperly used my status as...