Journal Articles
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Articles. Typically the realization of research papers reporting original research findings published in a journal issue. (URI: http://purl.org/coar/resource_type/c_6501) Item types include:
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Browsing Journal Articles by Subject "Chemistry"
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Item A uranium atlas, from 365 to 505 nm(Elsevier, 2020-03-02) Ross, Amanda J.; Crozet, Patricia; Adam, Allan G.; Tokaryk, Dennis W.A Fourier-transform spectrum of the emission from a commercial uranium hollow-cathode lamp 19,800–27,400 cm−1 is proposed, in ascii format, as a possible aid to calibration of laser excitation spectra.Item An alternative approach to interferogram collection and processing for a vintage Bomem DA3 Fourier transform spectrometer(Elsevier, 2019-08-12) Guislain, B.G.; Harvey, R.A.R; Tokaryk, D.W.; Ross, A.J.; Crozet, P.; Adam, A.G.We describe a new way of collecting data from Bomem DA3 Fourier transform spectrometers, bypassing the original computers used by these instruments, which are obsolete and more prone to failure than other parts of the system. We collect the interferogram, helium-neon reference laser, and a trigger marking zero path difference with a modern computer as a function of time at a high data rate, as opposed to as a function of position along the scanning arm of the interferometer. The interferogram is then reconstructed as a function of position (measured in helium-neon fringes) by interpolation. The resulting spectra are at least as good as those obtained from the original data processing methods. This work can be used as a model for reviving other DA3 systems which are in good order with respect to mechanical and electronic components, but with nonfunctional computers, or for collecting and processing data for any other Fourier transform spectrometers.Item High-resolution spectroscopy of the [18.4]2.5 – X2Δ5/2 transition of ruthenium monoboride (RuB)(Elsevier, 2020-06-30) Dore, J.M.; Adam, A.G.; Linton, C.; Tokaryk, D.W.Laser-induced fluorescence spectra of the (0, 0), (1, 0) and (0, 1) bands of the [18.4]2.5 – X2Δ5/2 transition have been recorded at high-resolution for several isotopologues of ruthenium monoboride (RuB). We report band origins and rotational parameters for 12 of the 14 possible isotopologues (7 for each of Ru11B and Ru10B) as well as hyperfine parameters of 99RuB and 101RuB. An anomalous isotope shift in the (0, 0) and (0, 1) bands indicates a weak perturbation in the [18.4]2.5 v = 0 vibrational level. The observed hyperfine structure is mainly due to the nuclear spin (I = 5/2) of the two Ru isotopes. Hyperfine structure due to the 11B and 10B isotopes was not resolved and resulted in, at most, a slight broadening of the lines. The magnetic hyperfine parameters help to confirm the (11σ)2(5π)4(2δ)3 configuration of the ground electronic state and provide insight into the configuration of the excited states.Item Hyperfine Analysis of the (2, 0) [18.3]3-X3Δ3 Transition of Cobalt Monoboride(Elsevier, 2019) Dore, J. M.; Adam, A. G.; Tokaryk, D. W.; Linton, C.High-resolution laser-induced fluorescence spectra of the (2, 0) [18.3]3-X3Δ3 transition of cobalt monoboride (CoB) have been recorded. We report updated rotational parameters for both the [18.3]3 (v′ = 2) and X3Δ3 (v″ = 0) states of Co11B, as well as newly determined hyperfine interaction parameters. The observed hyperfine splitting is mainly due to the nuclear spin of 59Co (I = 7/2, μ/μN = 4.627); the 11B (I = 3/2, μ/μN = 2.689) interaction only results in broadening of the individual hyperfine transitions. The magnetic hyperfine constants help confirm the ground state electronic configuration, (8σ)2(3π)4(1δ)3(9σ)1, and provide more insight into the configurational mixing in the excited state.Item Influencing the Optoelectronic Properties of a Heteroleptic Iridium Complex by Second-Sphere H-Bonding Interactions(American Chemical Society, July 3, 2018) Balónová, Barbora; Rota Martir, Diego; Clark, Ewan, R.; Shepherd, Helena, J.; Zysman-Colman, Eli; Blight, Barry, A.The use of a new second-sphere coordination methodology for emission color tuning of iridium complexes is presented. We demonstrate that a complimentary H-bonding guest molecule binding through contiguous triple H-bonding interactions can induce a shift in the emission of the iridium complex from green to blue without the need to alter the ligand structure around the metal centre, while simultaneously increasing the photoluminescence quantum yield in solution. The association constant for this host-guest interaction was determined to be Ka = 4.3 x 103 M-1 in a solution of 2% dimethylsulfoxide in chloroform by UV-Vis titration analysis and the impact of the hydrogen bonding interaction further probed by photoluminescence, electrochemical, and computational methods. Our findings suggest that directed self-assemblies are an effective approach to influencing emission properties of phosphorescent iridium (III) complexes.Item Thioarylmaleimides: accessible, tunable, and strongly emissive building blocks(Royal Society of Chemistry, 2019) Price, Jayden; Albright, Emily; Decken, Andreas; Eisler, SaraA series of thioarylmaleimides was synthesized to investigate how variation of the thioaryl group can be used to control absorption and emission properties in solution and in the solid-state. Fine-tuning of the photochemical properties was found to be possible using this strategy, and a rainbow of colours and emission wavelengths are accessible in a single step from commercially available compounds.