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Article Dans Une Revue Inorganic Chemistry Année : 2023

Lanthanide-Based Coordination Polymers Molecular Alloys Stability: A Thermochemical Approach

Résumé

In this study, we investigate the thermodynamics of lanthanide-based coordination polymer molecular alloys. We demonstrate that if lanthanide ions have many chemical similarities, the solubility of homo-lanthanide-based coordination polymers can vary significantly from one lanthanide ion to another. Indeed, we experimentally determine the solubility constants of a series of isostructural homo-lanthanide coordination polymers, with general chemical formula [Ln2(bdc)3(H2O)4]infinity with Ln = La-Er plus Y and where bdc2- symbolizes 1,4-benzene-di-carboxylate. Then, we extend the study to two series of isostructural molecular alloys with general chemical formula [Ln2xLn ' 2 -2x(bdc)3(H2O)4]infinity with 0 <= x <= 1 based either on heavy ([Eu2xTb2 - 2x(bdc)3(H2O)4]infinity) or light ( [Nd2xSm2-2x(bdc)3(H2O)4]infinity) lanthanide ions. We found that whatever the solubility difference of the homo-nuclear compounds is, the configurational entropy is the main driving force of the stabilization of molecular alloys.

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Chimie
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Dates et versions

hal-04057400 , version 1 (04-04-2023)

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Chloé Blais, Thibaut Morvan, Carole Daiguebonne, Yan Suffren, Guillaume Calvez, et al.. Lanthanide-Based Coordination Polymers Molecular Alloys Stability: A Thermochemical Approach. Inorganic Chemistry, 2023, 62 (11), pp.4495-4502. ⟨10.1021/acs.inorgchem.2c04198⟩. ⟨hal-04057400⟩
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