Hydrates and polymorphs of lead squarate Pb(C 4 O 4 ) Structural transformations studied by in situ X-ray powder diffraction and solid state NMR

T. Bataille; A. Bouhali; C. Kouvatas; C. Trifa; N. Audebrand; C. Boudaren

Hydrates and polymorphs of lead squarate Pb(C 4 O 4 ) Structural transformations studied by in situ X-ray powder diffraction and solid state NMR

T. Bataille ^{1, *} A. Bouhali ² C. Kouvatas ¹ C. Trifa ² N. Audebrand ¹ C. Boudaren ²

* Corresponding author

1 ISCR - Institut des Sciences Chimiques de Rennes

2 UMC - Université Mentouri Constantine [Algérie]

Abstract : Considering the low dimensionality of the crystal structure of the known lead squarate tetrahydrate, Pb(C 4 O 4 )·4H 2 O, the thermal reactivity of the powdered compound and structural studies of lower hydrates have been investigated from X-ray single-crystal and powder diffraction data, solid state NMR and thermal analyses. It is shown that Pb(H 2 O)(C 4 O 4 ) and two polymorphs of anhydrous PbC 4 O 4 can be formed within different conditions. The departure of the water molecules leads to the condensation of initial inorganic chains into 2D or 3D-type crystal structures. The full decomposition of the squarate ligand provides successive lead oxides. © 2019 Elsevier Ltd

Keywords : solid state NMR thermal behaviour phase transformation and polymorphism in situ powder diffraction lead squarate

Document type :

Journal articles

Domain :

Chemical Sciences

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Hydrates and polymorphs of lead squarate Pb(C 4 O 4 ) Structural transformations studied by in situ X-ray powder diffraction and solid state NMR

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