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Stepped spin crossover in Fe(III) halogen substituted quinolylsalicylaldimine complexes

21-10-2014 | Wasinee Phonsri; David James Harding; Phimphaka Harding; Keith S. Murray; Boujemaa Moubaraki; Ian Gass; John D Cashi ..., Dalton Transactions, 2014

The reaction of Fe(NCS)3 prepared in situ in MeOH with Hqsal-X (Hqsal-X = 5-X-N-quinolylsalicylaldimine) in CH2Cl2 yields the FeIII complexes, [Fe(qsal-X)2]NCS·solvent (X = F 1; X = Cl, 2, Br, 3 solvent = MeOH; X = I, solvent = 0.25CH2Cl2·0.5MeOH 4) in moderate to good yields. IR spectroscopy ...

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Donor- and/or Acceptor-Substituted Expanded Radialenes: Theory, Synthesis, and Properties

20-10-2014 | Sharwatie Ramsaywack; Sila Karaca; Mojtaba Gholami; Adrian H. Murray; Frank Hampel; Robert McDonald; Nuran Elmaci; H ..., The Journal of Organic Chemistry, 2014

The synthesis of donor- (D) and/or acceptor (A)-expanded [4]radialenes has been developed on the basis of readily available dibromoolefin (7), tetraethynylethene (10 and 20), and vinyl triflate (12) building blocks. The successful formation of D/A radialenes relies especially on (1) effective use ...

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Highly efficient and selective phosphorylation of amino acid derivatives and polyols catalysed by 2-aryl-4-(dimethylamino)pyridine-N-oxides – towards kinase-like reactivity

14-10-2014 | James I. Murray; Rudiger Woscholski; Alan C. Spivey, Chemical Communication, 2014

The chemoselective phosphorylation of hydroxyl containing amino acid derivatives and polyols by phosphoryl chlorides catalyzed by 2-aryl-4-(dimethylamino)pyridine-N-oxides is described.

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Regional, Annual, and Individual Variations in the Dihydroxyacetone Content of the Nectar of Ma̅nuka (Leptospermum scoparium) in New Zealand

14-10-2014 | Simon Williams; Jessica King; Maria Revell; Merilyn Manley-Harris; Megan Balks; Franziska Janusch; Michael Kiefer; M ..., Journal of Agricultural and Food Chemistry, 2014

A method was designed and validated for the analysis of dihydroxyacetone in the floral nectar of ma̅nuka (Leptospermum scoparium). The method was applied to samples collected from different regions of the North Island and the Nelson region of the upper South Island of New Zealand during the ...

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UV Photodissociation of trapped ions following ion mobility separation in a Q-ToF mass spectrometer

14-10-2014 | Bruno Bellina; Jeffery M Brown; Jakub Ujma; Paul Murray; Kevin Giles; Mike Morris; Isabelle Compagnon; Perdita Barran, Analyst, 2014

An ion mobility mass spectrometer has been modified to allow optical interrogation of ions with different mass-to-charge (m/z) ratios and/or mobilities (K). An ion trapping procedure has been developed which allows us to store ions for several seconds enabling UV photodissociation (UVPD).

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Engineering Charge Injection and Charge Transport for High Performance PbSe Nanocrystal Thin Film Devices and Circuits

13-10-2014 | Soong Ju Oh; Zhuqing Wang; Nathaniel E. Berry; Ji-Hyuk Choi; Tianshuo Zhao; E. Ashley Gaulding; Taejong Paik; Yuming ..., Nano Letters, 2014

We study charge injection and transport in PbSe nanocrystal thin films. By engineering the contact metallurgy and nanocrystal ligand exchange chemistry and surface passivation, we demonstrate partial Fermi-level pinning at the metal–nanocrystal interface and an insulator-to-metal transition with ...

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An assessment of vapour pressure estimation methods

09-10-2014 | Simon O'Meara; Alastair Murray Booth; Mark Howard Barley; David Topping; Gordon McFiggans, Physical Chemistry Chemical Physics, 2014

Laboratory measurements of vapour pressures for atmospherically relevant compounds were collated and used to assess the accuracy of vapour pressure estimates generated by seven estimation methods and impacts on predicted secondary organic aerosol. Of the vapour pressure estimation methods that ...

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Formation of Vibrationally Excited Methyl Radicals Following State-Specific Excitation of Methylamine

09-10-2014 | James O. Thomas; Katherine E. Lower; Craig Murray, Journal of Physical Chemistry A, 2014

The photochemistry of methylamine has been investigated following state-specific excitation of the S1 state. 2 + 1 resonance-enhanced multiphoton ionization was used to detect nascent methyl radical products via the 3p2A2″–X̃2A2″ electronic transition. Methyl radicals were formed at all ...

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Probing the magnetic and magnetothermal properties of M(II)-Ln(III) complexes (where M(II) = Ni or Zn; Ln(III) = La or Pr or Gd)

07-10-2014 | Maheswaran Shanmugam; Naushad Ahmed; Chinmoy Das; Shefali Vaidya; Anant Kumar Srivastava; Stuart Langley; Keith S. M ..., Dalton Transactions, 2014

We have established the coordination potential of the Schiff base ligand (2-methoxy-6-[(E)-2’-hydroxymethyl-phenyliminomethyl]-phenolate (H2L)) via the isolation of various M(II)-Ln(III) complexes (where M(II) = Ni or Zn and Ln(III) = La or Pr or Gd). Single crystals of these five complexes were ...

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Correction to “Solution Voltammetry of 4 nm Magnetite Iron Oxide Nanoparticles”

24-09-2014 | Joseph J. P. Roberts; John A. Westgard; Laura M. Cooper; Royce W. Murray, Journal of the American Chemical Society, 2014

Journal of the American Chemical Society DOI: 10.1021/ja509041d

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