The cluster structure of crystalline phases according to TGA/DTA and XPS data in isodimorphic substitution series [CuxNi(1−x){N(CH2PO3)3}]Na4·nH2O (x = 0 ... 1).

Autor: Chausov, Feodor F., Suksin, Nikita E., Kholzakov, Aleksandr V., Lomova, Natalya V., Kazantseva, Irina S., Rybin, Dmitry S.
Předmět:
Zdroj: Zeitschrift für Kristallographie. Crystalline Materials; Nov2022, Vol. 237 Issue 10-12, p377-383, 7p
Abstrakt: The cluster structure, thermochemical behavior, and some mechanisms of thermal decomposition of the crystalline products in the isodimorphic substitution series CuxNi(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. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index