No abstract

Phytochemical profiling was undertaken on the crude extracts of Drosera magna to determine the nature of the chemical constituents present. In total, three new flavonol diglycosides (1–3), one new flavan-3-ol glycoside (4), and 12 previously reported compounds of the flavonol (5, 9), flavan-3-ol (15), flavanone (8), 1,4-napthoquinone (6, 7, 13, 14), 2,3-dehydroxynapthalene-1,4-dione (10–12), and phenolic acid (16) structure classes were isolated and identified. Compounds 1–9, 13, 17, and 18 were assessed for antimicrobial activity, with compounds 6, 7, 8, and 9 showing significant activity. Compounds 1, 2, and 6 were also evaluated for anthelmintic activity against larval forms of Hemonchus contortus, with compound 6 being active.

No abstract

Metal−organic or all-inorganic Sb(V) bromide complexes are a novel class of semiconductor materials with potential use in optoelectronic devices. The implementation of these materials for optoelectronics is currently prohibited by their poor thermal stability and crippling solvent compatibility issues. Here, we address these limitations by introducing a new method for the synthesis of Sb(V) bromide complexes and thin films. The "post-deposition bromination" method presented here enables the fabrication of presumably any Sb(V) complex not previously accessible as thin films. We screen a set of Sb(V) bromides, identifying two promising candidate materials incorporating tetraethylammonium (TEA) or 2-chloro-N-methylpyridinium (CNMP). To prove the validity of the methods introduced in this work, we fabricate high-quality thin films of these complexes for the first time. Thin films of these materials are stable up to 110 °C (based on TGA measurements), which is significantly higher than the previously reported state-of-theart complex from N-ethylpyridinium (NEP, approx. 50 °C). Additionally, cation dependent band gap tunability is observed with thin films of the novel complexes having a direct band gap at 2.20 (CNMP) and 2.55 eV (TEA) as determined by optical analysis. The methodology introduced in this study provides an unprecedented platform for research into metal-organic Sb(V) thin film materials.

In the version of this Article originally published, in the Author Contributions section the text that read ' A.Z. and P.A. synthesized the chalcogen mixture and developed the synthesis procedure for 2D β-TeO 2 while also conducting XPS, Raman and AFM measurements. B.Y.Z. conducted some AFM imaging and contributed to low-temperature device testing' was incorrect; it should have read: ' A.Z. and P.A. synthesized the chalcogen mixture and developed the synthesis procedure for 2D β-TeO 2 while also conducting XPS and Raman measurements. A.Z., P.A. and B.Y.Z. performed the AFM imaging. ' This has now been corrected.