15 research outputs found
Mixed-Metal Palladium(II) Complexes: a Way from Heterometallic Carboxylates to Bimetallic Nanoparticles
The paper describes some chemical transformations of the mixed-metal palladium (II) complexes, including
interactions of binuclear complexes with pyridine, 1,10-phenanthroline and bipyridine; also described
thermal and reductive transformations of some binuclear and pentanuclear nitrogen-containing
complexes, in particular red-ox transformations in reductive media to yield mixed-metal nanomaterials.
For this nanomaterials and nanoalloys also provided HREM and TEM investigations.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3523
First platinum(ii)–alkaline-earth acetate-bridged complexes Ptii(m-OAc)4Mii(AcOH)4 (M = Ca, Sr, Ba)
The first platinum(ii)–alkaline-earth acetate-bridged complexes Ptii(m-OAc)4Mii(AcOH)4 (M = Ca, Sr, Ba) were synthesized, structurally characterized using single-crystal synchrotron radiation X-ray diffraction analysis and tested for catalytic performance in homogeneous styrene hydrogenation under mild conditions. © 201
First platinum(ii)–alkaline-earth acetate-bridged complexes Ptii(m-OAc)4Mii(AcOH)4 (M = Ca, Sr, Ba)
The first platinum(ii)–alkaline-earth acetate-bridged complexes Ptii(m-OAc)4Mii(AcOH)4 (M = Ca, Sr, Ba) were synthesized, structurally characterized using single-crystal synchrotron radiation X-ray diffraction analysis and tested for catalytic performance in homogeneous styrene hydrogenation under mild conditions. © 201
Ortnogonal-to-unitary ensemble crossover in the electronic specific heat of metal namoclusters
We present a theoretical and experimental study on the influence of a magnetic
field on the energy-level statistics in metal nanoparticles. Based on the random-matrix
theory, a gradual field-in-duced crossover behavior is predicted from the orthogonal to the
unitary ensemble. Experimental data of the electronic specific heat of metal nanoparticles
for different fields in the quantum-size temperature regime compare favourably with these
theoretical (analytical) predictions
Structure and quantum chemical study of crystalline platinum(II) acetate
Calculations by the hybrid functional PBE0 with scalar relativistic corrections and the QTAIM method revealed the metal-metal bonding in the molecule of platinum(II) acetate Pt4(μ-OAc)8, which stabilizes the molecule by 50 kcal mol−1. © 201
Nanostructured PtZn intermetallic compound: Controlled formation from PtZn(CH3COO)4 molecular precursor and tests of catalytic properties
Phase transformations of a newly synthesized heterobimetallic ZnPt(OOCMe)4(H2O)(MeCOOH)2 acetate in a chemically reductive atmosphere at mildly elevated temperatures are thoroughly studied in order to optimize conditions for the formation of nanostructured PtZn intermetallic compound. According to XAFS and XRD data, the first stage of reductive thermolysis is the reduction of the noble metal, while zinc remains in an oxygen environment. At the second stage the reduction of Zn and the formation of the bimetallic solid solution with the fcc lattice occur. It is shown that recrystallization of solid solution to ordered PtZn intermetallic compound with the tetragonal structure occurs in a narrow temperature range of 250–275 °C. Based on these results, the optimum reduction temperature for the preparation of supported bimetallic Pt–Zn/Al2O3 catalyst was determined to be 300 °C. Results of catalytic tests of the supported material are reported. © 2021 Elsevier Lt
Nanostructured PtZn intermetallic compound: Controlled formation from PtZn(CH<sub>3</sub>COO)<sub>4</sub> molecular precursor and tests of catalytic properties
Phase transformations of a newly synthesized heterobimetallic ZnPt(OOCMe)4(H2O)(MeCOOH)2 acetate in a chemically reductive atmosphere at mildly elevated temperatures are thoroughly studied in order to optimize conditions for the formation of nanostructured PtZn intermetallic compound. According to XAFS and XRD data, the first stage of reductive thermolysis is the reduction of the noble metal, while zinc remains in an oxygen environment. At the second stage the reduction of Zn and the formation of the bimetallic solid solution with the fcc lattice occur. It is shown that recrystallization of solid solution to ordered PtZn intermetallic compound with the tetragonal structure occurs in a narrow temperature range of 250–275 °C. Based on these results, the optimum reduction temperature for the preparation of supported bimetallic Pt–Zn/Al2O3 catalyst was determined to be 300 °C. Results of catalytic tests of the supported material are reported