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(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