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Unraveling the Decomposition Process of Lead(II) Acetate : Anhydrous Polymorphs, Hydrates, and Byproducts and Room Temperature Phosphorescence

Martinez, Francisco LU ; Ramos-Riesco, Miguel; Rodríguez-Cheda, José A.; Cucinotta, Fabio; Matesanz, Emilio; Miletto, Ivana; Gianotti, Enrica; Marchese, Leonardo and Matej, Zdenek LU (2016) In Inorganic Chemistry 55(17). p.8576-8586
Abstract

Lead(II) acetate [Pb(Ac)2, where Ac = acetate group (CH3-COO-)2] is a very common salt with many and varied uses throughout history. However, only lead(II) acetate trihydrate [Pb(Ac)2·3H2O] has been characterized to date. In this paper, two enantiotropic polymorphs of the anhydrous salt, a novel hydrate [lead(II) acetate hemihydrate: Pb(Ac)2·1/2H2O], and two decomposition products [corresponding to two different basic lead(II) acetates: Pb4O(Ac)6 and Pb2O(Ac)2] are reported, with their structures being solved for the first time. The compounds present a variety of molecular... (More)

Lead(II) acetate [Pb(Ac)2, where Ac = acetate group (CH3-COO-)2] is a very common salt with many and varied uses throughout history. However, only lead(II) acetate trihydrate [Pb(Ac)2·3H2O] has been characterized to date. In this paper, two enantiotropic polymorphs of the anhydrous salt, a novel hydrate [lead(II) acetate hemihydrate: Pb(Ac)2·1/2H2O], and two decomposition products [corresponding to two different basic lead(II) acetates: Pb4O(Ac)6 and Pb2O(Ac)2] are reported, with their structures being solved for the first time. The compounds present a variety of molecular arrangements, being 2D or 1D coordination polymers. A thorough thermal analysis, by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), was also carried out to study the behavior and thermal data of the salt and its decomposition process, in inert and oxygenated atmospheres, identifying the phases and byproducts that appear. The complex thermal behavior of lead(II) acetate is now solved, finding the existence of another hydrate, two anhydrous enantiotropic polymorphs, and some byproducts. Moreover, some of them are phosphorescent at room temperature. The compounds were studied by TGA, DSC, X-ray diffraction, and UV-vis spectroscopy.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Inorganic Chemistry
volume
55
issue
17
pages
11 pages
publisher
The American Chemical Society
external identifiers
  • scopus:84986193753
  • wos:000382713900042
ISSN
0020-1669
DOI
10.1021/acs.inorgchem.6b01116
language
English
LU publication?
yes
id
c8021aba-802a-4c13-bc4a-88e0b5ee0266
date added to LUP
2016-11-17 10:55:59
date last changed
2017-07-30 05:17:26
@article{c8021aba-802a-4c13-bc4a-88e0b5ee0266,
  abstract     = {<p>Lead(II) acetate [Pb(Ac)<sub>2</sub>, where Ac = acetate group (CH<sub>3</sub>-COO<sup>-</sup>)<sub>2</sub>] is a very common salt with many and varied uses throughout history. However, only lead(II) acetate trihydrate [Pb(Ac)<sub>2</sub>·3H<sub>2</sub>O] has been characterized to date. In this paper, two enantiotropic polymorphs of the anhydrous salt, a novel hydrate [lead(II) acetate hemihydrate: Pb(Ac)<sub>2</sub>·<sup>1</sup>/<sub>2</sub>H<sub>2</sub>O], and two decomposition products [corresponding to two different basic lead(II) acetates: Pb<sub>4</sub>O(Ac)<sub>6</sub> and Pb<sub>2</sub>O(Ac)<sub>2</sub>] are reported, with their structures being solved for the first time. The compounds present a variety of molecular arrangements, being 2D or 1D coordination polymers. A thorough thermal analysis, by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), was also carried out to study the behavior and thermal data of the salt and its decomposition process, in inert and oxygenated atmospheres, identifying the phases and byproducts that appear. The complex thermal behavior of lead(II) acetate is now solved, finding the existence of another hydrate, two anhydrous enantiotropic polymorphs, and some byproducts. Moreover, some of them are phosphorescent at room temperature. The compounds were studied by TGA, DSC, X-ray diffraction, and UV-vis spectroscopy.</p>},
  author       = {Martinez, Francisco and Ramos-Riesco, Miguel and Rodríguez-Cheda, José A. and Cucinotta, Fabio and Matesanz, Emilio and Miletto, Ivana and Gianotti, Enrica and Marchese, Leonardo and Matej, Zdenek},
  issn         = {0020-1669},
  language     = {eng},
  month        = {09},
  number       = {17},
  pages        = {8576--8586},
  publisher    = {The American Chemical Society},
  series       = {Inorganic Chemistry},
  title        = {Unraveling the Decomposition Process of Lead(II) Acetate : Anhydrous Polymorphs, Hydrates, and Byproducts and Room Temperature Phosphorescence},
  url          = {http://dx.doi.org/10.1021/acs.inorgchem.6b01116},
  volume       = {55},
  year         = {2016},
}