Solubility and thermodynamic data of manganese hydrogen phosphate in the system MnOP2O5H2O at 35, 40, 45 and 50°C

Near-Infrared and Visible Photoactivation to Uncage Carbon Monoxide from an Aqueous-Soluble PhotoCORM

“…It is notable that the product spectra after the second stage were essentially the same as that of free TPYOH (SI Figures S19 and S20) in each case. One can rationalize this observation by recognizing that Mn­(II) complexes should be relatively labile and that Mn­(II) phosphate salts are quite insoluble . Thus, the phosphate would likely strip the manganese from complexes such as 3 or D , leaving TPYOH as the only strongly absorbing chromophore in solution.…”

“…One can rationalize this observation by recognizing that Mn(II) complexes should be relatively labile and that Mn(II) phosphate salts are quite insoluble. 38 Thus, the phosphate would likely strip the manganese from complexes such as 3 or D, leaving TPYOH as the only strongly absorbing chromophore in solution.…”

Synthesis of MnNiP2O7 and Nonisothermal Decomposition Kinetics of a New Binary Mn0.5Ni0.5HPO4·H2O Precursor Obtained from a Rapid Coprecipitation at Ambient Temperature

“…9,19,20 The binary manganese nickel pyrophosphate, MnNiP 2 O 7 , is found to be the final product of the thermal decomposition at T > 673 K. The total mass loss is 22.55% (2.13 mol of H 2 O), which is close to the theoretical value of 21.20% (2 mol of H 2 O). The thermal stability, mechanism, and phase transition temperature of Mn 0.5 Ni 0.5 HPO 4 • H 2 O show differences from those of the individual MnHPO 4 • H 2 O and NiHPO 4 • H 2 O 9,19,20. On the basis of thermal analysis results, we can conclude that the different thermal behavior is caused by the incorporation between Mn and Ni metals in the skeleton.…”

“…[6][7][8] The presence of water molecules influences the intermolecular interactions (affecting the internal energy and enthalpy) as well as the crystalline disorder (entropy) and, hence, influences the free energy, thermodynamic activity, solubility, stability, and electrochemical and catalytic activities. [9][10][11][12] Studies on the thermodynamics, mechanisms, and kinetics of solid-state reactions are a challenging and difficult task with complexity resulting from the great variety of factors with diverse effects such as reconstruction of solid-state crystal lattices, formation and growth of new crystallization nuclei, diffusion of gaseous reagents or reaction products, heat conductance of materials, static or dynamic character of the environment, and physical state of the reagentssdispersity, layer thickness, specific area and porosity, type, amount and distribution of the active centers on solid state surface, etc. 13,14 The results obtained from such studies can be directly applied in materials science for the preparation of various metals and alloys, cements, ceramics, glasses, enamels, glazes, and polymer and composite materials.…”

“…Many metal hydrogen phosphates are used as heterogeneous catalysts for a variety of organic processes. – Because of their acidity and porosity, as layered materials they represent a vast class of intercalating compounds with useful chemical and thermal properties, and have been extensively used as heterogeneous catalysts. , Thermal treatment of metal hydrogen phosphates is a great synthetic potential as they may turn simple compounds into advanced materials, such as ceramics, catalysts, and glasses. They are transformed to other phosphates by hydrolysis and dehydration reactions at high temperatures. – The presence of water molecules influences the intermolecular interactions (affecting the internal energy and enthalpy) as well as the crystalline disorder (entropy) and, hence, influences the free energy, thermodynamic activity, solubility, stability, and electrochemical and catalytic activities. – Studies on the thermodynamics, mechanisms, and kinetics of solid-state reactions are a challenging and difficult task with complexity resulting from the great variety of factors with diverse effects such as reconstruction of solid-state crystal lattices, formation and growth of new crystallization nuclei, diffusion of gaseous reagents or reaction products, heat conductance of materials, static or dynamic character of the environment, and physical state of the reagentsdispersity, layer thickness, specific area and porosity, type, amount and distribution of the active centers on solid state surface, etc. , The results obtained from such studies can be directly applied in materials science for the preparation of various metals and alloys, cements, ceramics, glasses, enamels, glazes, and polymer and composite materials. – The present paper reports the synthesis of MnNiP 2 O 7 powder from thermal decomposition of a new binary Mn 0.5 Ni 0.5 HPO 4 ·H 2 O obtained by a rapid coprecipitation method, which is a simple rapid and cost-effective route. The kinetics of dehydration of Mn 05 Ni 0.5 HPO 4 ·H 2 O was studied under nonisothermal heating on thermogravimetric (TG) equipment.…”