Abstract
The cluster structure, thermochemical behavior, and some mechanisms of thermal decomposition of the crystalline products in the isodimorphic substitution series Cu x Ni(1−x)NTP (x = 0 … 1) have been studied by simultaneous the thermal gravimetric analysis and differential thermal analysis (TGA/DTA) and X-ray photoelectron spectroscopy (XPS). The complexes NiNTP and Cu1/8Ni7/8NTP with a monoclinic crystal structure are the most thermo-stable and characterized by one-step decomposition at 400–440 °C with the formation of metal phosphides and phosphates. The complexes Cu3/8Ni5/8NTP–Cu3/4Ni1/4NTP with the triclinic crystal lattice and the trigonal-bipyramidal coordination of metal atoms decompose in two steps. Firstly, the formation of a heteroligand complex with imino-bis-methylenephosphonic and methylphosphonic acids takes place at 245 °C. Secondly, the complex decomposes at 270–380 °C. The monometallic complex CuNTP decomposes almost completely at 280–300 °C.
Funding source: Ministry of Science and Higher Education of the Russian Federation
Award Identifier / Grant number: projects 121030100002-0 and 121030100003-7
Acknowledgments
Studies were performed using equipment of Core shared research facilities “Center of physical and physical-chemical methods of analysis, investigations of properties and characteristics of surface, nanostructures, materials and products” of UdmFRC UB RAS.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: Authors acknowledge financial support from Ministry of Science and Higher Education of the Russian Federation (projects 121030100002-0 and 121030100003-7).
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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