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Reactivity of a coordinated inorganic acetylene unit, HBNH, and the azidoborane cation [HB(N₃)].

ABSTRACT: A donor-acceptor complex of HBNH was prepared via thermolysis of a carbene-stabilized azidoborane. The reactivity of the fundamentally important HBNH unit (inorganic alkyne analogue) was explored in detail, including attempts to convert this species and related hydrido(azido)borane cations into molecular complexes of BN. This work provides added impetus for the development of molecular precursors that can release bulk boron nitride (a desirable insulator and thermal conductor) under mild conditions, and from solution.

SUBMITTER: Swarnakar AK

PROVIDER: S-EPMC5365008 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature

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Reactivity of a coordinated inorganic acetylene unit, HBNH, and the azidoborane cation [HB(N<sub>3</sub>)].

Swarnakar Anindya K AK Hering-Junghans Christian C Ferguson Michael J MJ McDonald Robert R Rivard Eric E

Chemical science 20161219 3

A donor-acceptor complex of HBNH was prepared <i>via</i> thermolysis of a carbene-stabilized azidoborane. The reactivity of the fundamentally important HBNH unit (inorganic alkyne analogue) was explored in detail, including attempts to convert this species and related hydrido(azido)borane cations into molecular complexes of BN. This work provides added impetus for the development of molecular precursors that can release bulk boron nitride (a desirable insulator and thermal conductor) under mild ...[more]

PMID: 28451338

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Project description:The influence of inorganic anions on the photoreactivity and aggregation of titanium dioxide nanoparticles (NPs) was assessed by dosing carbonate, chloride, nitrate, phosphate, and sulfate as potassium salts at multiple concentrations. NP stability was monitored in terms of aggregate morphology and electrophoretic mobility (EPM). Aggregate size and fractal dimension were measured over time by laser diffraction, and the isoelectric point (IEP) as a function of anion and concentration was obtained by measuring EPM versus pH. Phosphate, carbonate, and to a lesser extent, sulfate decreased the IEP of TiO2 and stabilized NP suspensions owing to specific surface interactions, whereas this was not observed for nitrate and chloride. TiO2 NPs were exposed to UV-A radiation, and the photoreactivity was assessed by monitoring the production of reactive species over time both at the NP surface (photogenerated holes) and in the bulk solution (hydroxyl radicals) by observing their reactions with the selective probe compounds iodide and terephthalic acid, respectively. The generation of photogenerated holes and hydroxyl radicals was influenced by each inorganic anion to varying degrees. Carbonate and phosphate inhibited the oxidation of iodide, and this interaction was successfully described by a Langmuir-Hinshelwood mechanism and related to the characteristics of TiO2 aggregates. Chloride and nitrate do not specifically interact with TiO2, and sulfate creates relatively weak interactions with the TiO2 surface such that no decrease in photogenerated hole reactivity was observed. A decrease in hydroxyl radical generation was observed for all inorganic anions. Quenching rate constants for the reaction of hydroxyl radicals with each inorganic anion do not provide a comprehensive explanation for the magnitude of this decrease, which arises from the interplay of several physicochemical phenomena. This work shows that the reactivity of NPs will be strongly influenced by the makeup of the waters they are released into. The impact of anion species on hydroxyl radical inhibition was as follows: carbonate > chloride > phosphate > nitrate > sulfate.

Dataset Information

Reactivity of a coordinated inorganic acetylene unit, HBNH, and the azidoborane cation [HB(N₃)].

Publications

Reactivity of a coordinated inorganic acetylene unit, HBNH, and the azidoborane cation [HB(N<sub>3</sub>)].

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Reactivity of a coordinated inorganic acetylene unit, HBNH, and the azidoborane cation [HB(N3)].

Publications

Reactivity of a coordinated inorganic acetylene unit, HBNH, and the azidoborane cation [HB(N<sub>3</sub>)].

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Reactivity of a coordinated inorganic acetylene unit, HBNH, and the azidoborane cation [HB(N₃)].