نتایج جستجو برای: boron wheel molecules

تعداد نتایج: 225222  

Journal: :Advanced materials 2015
Evgeny A Ekimov Oleg S Kudryavtsev Andrey A Khomich Oleg I Lebedev Tatiana A Dolenko Igor I Vlasov

The first application of the high-pressure-high-temperature (HPHT) technique for direct production of doped ultrasmall diamonds starting from a one-component organic precursor is reported. Heavily boron-doped diamond nanoparticles with a size below 10 nm are produced by HPHT treatment of 9-borabicyclo [3,3,1]nonane dimer molecules.

Journal: :Chemical communications 2015
Claudius Morchutt Jonas Björk Sören Krotzky Rico Gutzler Klaus Kern

Polymerization of 1,3,5-tris(4-bromophenyl)benzene via dehalogenation on graphene and hexagonal boron nitride is investigated by scanning tunneling microscopy experiments and density functional theory calculations. This work reveals how the interactions between molecules and graphene or h-BN grown on Ni(111) govern the surface-confined synthesis of polymers through C-C coupling.

2015
Nicole Holzmann Markus Hermann Gernot Frenking

Quantum chemical calculations of the compound B2(NHC )2 and a thorough examination of the electronic structure with an energy decomposition analysis provide strong evidence for the appearance of boron–boron triple bond character. This holds for the model compound and for the isolated diboryne B2(NHC )2 of Braunschweig which has an even slightly shorter B–B bond. The bonding situation in the mol...

The boron–boron triple bond in NHC→B 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 B←NHC† †This paper is dedicated to Professor Peter Paetzold on the occasion of his 80th birthday. ‡ ‡Electronic supplementary information (ESI) available: Details of the theoretical calculations and coordinates and energies of the calculated molecules. See DOI: 10.1039/c5sc01504a

2015
Nicole Holzmann Markus Hermann Gernot Frenking

Quantum chemical calculations of the compound B2(NHC )2 and a thorough examination of the electronic structure with an energy decomposition analysis provide strong evidence for the appearance of boron–boron triple bond character. This holds for the model compound and for the isolated diboryne B2(NHC )2 of Braunschweig which has an even slightly shorter B–B bond. The bonding situation in the mol...

Journal: :Journal of the American Chemical Society 2014
Tao Yang Dorian S N Parker Beni B Dangi Ralf I Kaiser Domenico Stranges Yuan-Hsiang Su Si-Ying Chen Agnes H H Chang Alexander M Mebel

As a member of the organo sulfidoboron (RBS) family, the hitherto elusive ethynylsulfidoboron molecule (HCCBS) has been formed via the bimolecular reaction of the boron monosulfide radical (BS) with acetylene (C2H2) under single collision conditions in the gas phase, exploiting the crossed molecular beams technique. The reaction mechanism follows indirect dynamics via a barrierless addition of ...

Journal: :ACS applied materials & interfaces 2014
W S Yeap X Liu D Bevk A Pasquarelli L Lutsen M Fahlman W Maes K Haenen

N3 dye molecules [cis-bis(isothiocyanato)bis(2,2'-bipyridyl-4,4'-dicarboxylato)ruthenium(II)] are covalently attached to boron-doped nanocrystalline diamond (B:NCD) thin films through a combination of coupling chemistries, i.e., diazonium, Suzuki, and EDC-NHS. X-ray and ultraviolet photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy are used to verify the coval...

Journal: :ACS applied nano materials 2022

The diverse coordination environment on the surface of carbon-based nanomaterials contributes significantly to their unique adsorption properties. Here, we perform first-principles calculations determine sensitivity and selectivity pristine, 1B, homonuclear 2B-doped graphdiyne, pentagraphene, phagraphene structures toward toxic phosgene (COCl2) gas molecule. strength perfect surfaces is negligi...

Journal: :progress in biological sciences 2012
razieh moalemi mahnaz aghdasi faezeh ghanati

boron (b) is a non-metal micronutrient which is essential for plants growth and development. formation of boron complex with cell wall matrix and phenolic compounds is a definite influence of boron in physiological process. it has been suggested that b-toxicity and deficiency may induce excess production of reactive oxygen species thereby promote defense responses by antioxidant enzymes or non-...

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