1,721,170 research outputs found
Trees as Participants in News Articles of British Quality Newspapers. An ecolinguistics perspective
Full text linkHumans are dependent on trees in ways that cannot be overstated, especially at times of severe climate crisis. Yet, the investigation of trees as participants in discourse is an under-researched field in ecolinguistics. The study addresses this research gap by exploring the construal of discursive roles of trees within a framework combining ecolinguistics studies (Alexander and Stibbe 2014; Bortoluzzi and Zurru 2024; Fill and Mühlh.usler 2001; Fill and Penz 2018; Steffensen 2024a, 2024b; Steffensen and Fill 2014, Stibbe 2021) and ecocultural identities (Milstein and Castro-Sotomayor 2020a; Stibbe 2020). The qualitative small-scale study examines how discoursal roles of trees as participants in news discourse are represented and contextualised in 100 news items published between January and June 2024 in three British quality newspapers (The Daily Telegraph, The Times, The Guardian). The research questions are: How are trees represented in
mainstream news in British quality newspapers? What roles are construed for them in relation with human participants? Data-driven categories are discussed on the basis of news values (Bednarek and Caple 2012, 2017) and value assessment of natural entities (Himes et al. 2024). The resulting categories constitute a cline ranging from representing trees as living beings worthy of respect (a minority of instances) to beings functional to human needs, or as valueless and disposable objects. The majority of instances represents trees as instrumental to human needs and purposes, thus revealing a profound anthropocentric bias in news discourse. The results raise awareness on the need for more ecocentric perspectives in news discourse, and have implications for ecolinguistics education
Monica Gagliano, John C. Ryan, and Patrícia Vieira (Eds.), The Language of Plants: Science, Philosophy, Literature. University of Minnesota Press, 2017; ISBN: 978-1-5179-0185-1
No full textIntroduction: Ecological Communication for Raising Awareness and Ecoliteracy for Taking Action
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1,3-Dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide as ligand for the preparation of luminescent lanthanide complexes
No full textEuropium(III) coordination compounds having general formula [Eu(beta-dike)(3)L-2] (beta-dike=dibenzoylmethanate, tenoyltrifluoroacetonate; L=1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide) were isolated and characterized. The complexes exhibited bright red emission associated to the D-5(0)-> F-7(J) transitions of the metal center upon excitation with near-UV light, with intrinsic quantum yields around 51% and 65%, respectively, for the dibenzoylmethanate and tenoyltrifluoroacetonate derivatives. More information about the behavior of 1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide as an antenna-ligand towards trivalent lanthanide ions was obtained by its coordination to [Ln(NO3)(3)] (Ln=Eu, Gd, Tb) metal fragments.[GRAPHICS].Europium(III) coordination compounds having general formula [Eu(β-dike)3L2] (β-dike = dibenzoylmethanate, tenoyltrifluoroacetonate; L = 1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide) were isolated and characterized. The complexes exhibited bright red emission associated to the 5D0→7FJ transitions of the metal center upon excitation with near-UV light, with intrinsic quantum yields around 51% and 65%, respectively, for the dibenzoylmethanate and tenoyltrifluoroacetonate derivatives. More information about the behavior of 1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide as an antenna-ligand towards trivalent lanthanide ions was obtained by its coordination to [Ln(NO3)3] (Ln = Eu, Gd, Tb) metal fragments
Dibromomanganese(II) complexes with hexamethylphosphoramide and phenylphosphonic bis(diamide) ligands
No full textTetrahedral dibromomanganese(II) complexes having formulas [MnBr2{O = PR(NMe2)2}2] (R = NMe2 (1); Ph (2)) were isolated and characterized by single crystal X-ray diffraction. [MnBr2{O = P(NMe2)3}2] (1) crystallizes in the monoclinic C2/c space group. The asymmetric unit contains one half of the molecule with the Mn(II) atom in a distorted tetrahedral coordination. The intermolecular network of this coordination compound was studied by generating and inspecting its Hirshfeld surface, while the weak intramolecular hydrogen bonds were investigated computationally by AIM analysis in the gas phase and in solution. The Hirshfeld analysis was extended to the related [MnBr2{O = PPh(NMe2)2}2] complex (2).</p
Palladium(II) and platinum(II) pyrrolate-quinoline-imine chlorocomplexes by metal-assisted condensation reactions
No full textDual emission from Mn(II) complexes with carbazolyl-substituted phosphoramides
Full text linkThe carbazolyl-substituted phosphoramide N,N,N’,N’-tetramethyl-P-carbazol-9-ylphosphonic diamide (L) was successfully coordinated to MnX2 halides (X = Cl, Br, I), obtaining tetrahedral complexes having general formula [MnX2L2]. The structures were ascertained by means of single-crystal X-ray diffraction. The three complexes show appreciable luminescence in the visible range upon excitation with UV radiation, attributed to the Mn(II) 4T1(4G)→6A1(6S) transition superimposed to the emission from coordinated ligands. The different contributions are particular evident for the chloro-complex and the relative intensity depends upon the excitation wavelength. The correlation between the two emitting levels is highlighted by the luminescence decay curves of the three compounds
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