Low-temperature behavior of heat capacity and pho-toluminescence of a binuclear pivalate complex [Eu2(bath)2(piv)6]

I. G. Fomina; Фомина И. Г.; A. V. Tyurin; Тюрин А. В.; Yu. S. Zavorotny; Заворотный Ю. С.; I. L. Eremenko; Еременко И. Л.

doi:10.31857/S0132344X23600571

Low-temperature behavior of heat capacity and pho-toluminescence of a binuclear pivalate complex [Eu2(bath)2(piv)6]

Authors: Fomina I.G.¹, Tyurin A.V.¹, Zavorotny Y.S.², Eremenko I.L.¹
Affiliations:
1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
2. Scobeltsyn Nuclear Physics Research Institute of the Moscow State University
Issue: Vol 49, No 12 (2023)
Pages: 782-789
Section: Articles
URL: https://journals.rcsi.science/0132-344X/article/view/162376
DOI: https://doi.org/10.31857/S0132344X23600571
EDN: https://elibrary.ru/LRGQYE
ID: 162376

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Abstract

The low-temperature behavior of the heat capacity and photoluminescence of the previously structurally characterized binuclear pivalate complex [Eu2(bath)2(piv)6] (monoclinic, I2/a) (1), where bath = 4,7-diphenyl-1,10-phenanthroline, piv = (CH3)3CCO2-. Using the adiabatic calorimetry method, the temperature dependence of the heat capacity was measured in the temperature range 5.96–302.88 K and the thermodynamic functions Cp0(T), S0(T), Ф0(Т) and Н0(Т) - Н0(0) were calculated. The absence of low-temperature phase transformations of complex 1 was shown. It was established that in the temperature range 98-295 K, complex 1 demonstrates high temperature stability of the integral intensity of photoluminescence of the transitions of the Eu3+ ion 5D0-7Fj (j = 0.6).

Keywords

europium carboxylate, 4, 7-diphenyl-1, 10-phenanthroline, adiabatic calorimetry, photoluminescence

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