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metal-organic compounds
O. Q. Munro, K. Gillham and M. P. Akerman
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Zinc oxide network structures resembling a foam-like morphology are synthesized via a sol–gel route using a structure-directing diblock copolymer with different molecular weights. Grazing-incidence small-angle X-ray scattering has been used to study the variation in porosity and the average pore size of the films, thereby enabling fine tuning of the morphology depending on the final application.
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The main topic of this study is newly discovered ZnO/ZnS polytypes, which provide alternative structural arrangements of ZnO/ZnS compounds. In particular, pristine ZnO and ZnS compounds and mixed ZnO1–xSx compounds (x = 0.20, 0.25, 0.33, 0.50, 0.60, 0.66 and 0.75) have been investigated. All calculations have been performed at ab initio level using density functional theory–local density approximation and hybrid Heyd–Scuseria–Ernzerhof functionals.
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The title molecule consists of a triangular triosmium(0) core surrounded by eight carbonyl ligands and four 1,3,5-triaza-7-phosphatricyclo[3.3.1.13,7]decane ligands.
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X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine-structure (EXAFS) spectra were recorded to investigate the electronic structure and local crystal structure of ZnO and ZnO:B powders produced via hydrothermal synthesis. No disorder within the crystallographic structure of ZnO upon B doping has been observed by X-ray diffraction results which are supported by the EXAFS results.