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School of Biological Sciences
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School of Psychology
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School of Chemical and Physical Sciences
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  • [show abstract] [hide abstract]
    ABSTRACT: Salicylaldimines are popular ligands used in the synthesis of anisotropic complexes which can form liquid crystal phases (metallomesogens). They tautomerise via exchange of the phenol proton, giving rise to solvent-dependent photophysical behaviour. In this study the photophysical behaviour of a family of 4-alkoxysalicylaldimine ligands and their corresponding copper(II) complexes were examined using electronic absorption spectroscopy and density functional theory (DFT). The solvent-dependent photophysical behaviour exhibited by the ligands is due to changes in the position of the tautomeric equilibrium as the degree of hydrogen-bonding character of the solvent is modified. Furthermore, the ligands bind in an intermediate state in the copper(II) complex, with the possible existence of a third tautomer. The electronic absorption properties of these compounds are strongly affected by changes in the environment around the molecule.
    Journal of Photochemistry and Photobiology A: Chemistry. 01/2014;
  • Computer Speech & Language 01/2014; 28(2):540–542.
  • [show abstract] [hide abstract]
    ABSTRACT: Matrices of binary or count data are modelled under a unified statistical framework using finite mixtures to group the rows and/or columns. These likelihood-based one-mode and two-mode fuzzy clusterings provide maximum likelihood estimation of parameters and the options of using likelihood ratio tests or information criteria for model comparison. Geometric developments focused on pattern detection give likelihood-based analogues of various techniques in multivariate analysis, including multidimensional scaling, association analysis, ordination, correspondence analysis, and the construction of biplots. Illustrative examples demonstrate the effectiveness of these visualisations for identifying patterns of ecological significance (e.g. abrupt versus slow species turnover).
    Computational Statistics & Data Analysis 01/2014; 71:241–261.


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Top publications last week by downloads

Journal of Personality and Social Psychology 10/1990; 59(5):899-915.
Social Indicators Research 89(1):169-177.

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