The characterisation of lead fatty acid soaps in 'protrusions' in aged traditional oil paint.

Michael John Plater; B. M. de Silva; T. Glebrich; M. B. Hursthouse; C. L. Higgitt; D. R. Saunders

doi:10.1016/S0277-5387(03)00461-3

The characterisation of lead fatty acid soaps in 'protrusions' in aged traditional oil paint.

Michael John Plater, B. M. de Silva, T. Glebrich, M. B. Hursthouse, C. L. Higgitt, D. R. Saunders

Chemistry

Research output: Contribution to journal › Article › peer-review

104 Citations (Scopus)

Abstract

Lead(II) carboxylate soaps of two fatty acids, palmitic (C15H31COOH) and stearic acids (C17H35COOH), and a dicarboxylic acid, azelaic acid (HOOCC7H14COOH), have been synthesised and characterised by FTIR spectroscopy. These acids are all encountered in aged traditional oil paint, the azelaic acid resulting from the oxidative degradation of unsaturated fatty acids in the oil. Lead(II) azelate synthesised by hydrothermal methods was characterised by single crystal structure determination. This has a 3D polymeric structure with lead(II) ions linked by carboxylate bridges to form an infinite stack of (PbO4)(n) units. These layers are connected to adjacent layers by an infinite number of parallel C(CH2)(7)C chains arranged perpendicularly to the stacks. The lead(II) ions display an unusual 7-fold coordination. The first direct evidence that the 'protrusions' encountered in aged traditional lead-containing oil paints contain lead soaps is reported. Their mechanism of formation is discussed. (C) 2003 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	3171-3179
Number of pages	8
Journal	Polyhedron
Volume	22
Issue number	22
DOIs	https://doi.org/10.1016/S0277-5387(03)00461-3
Publication status	Published - 2003

Keywords

lead soaps
hydrothermal
palmitic acid
stearic acid
red lead
lead-tin yellow
C-13
NMR

Access to Document

10.1016/S0277-5387(03)00461-3

Cite this

@article{8f85df77e30248d9a0d2af0cc2727905,

title = "The characterisation of lead fatty acid soaps in 'protrusions' in aged traditional oil paint.",

abstract = "Lead(II) carboxylate soaps of two fatty acids, palmitic (C15H31COOH) and stearic acids (C17H35COOH), and a dicarboxylic acid, azelaic acid (HOOCC7H14COOH), have been synthesised and characterised by FTIR spectroscopy. These acids are all encountered in aged traditional oil paint, the azelaic acid resulting from the oxidative degradation of unsaturated fatty acids in the oil. Lead(II) azelate synthesised by hydrothermal methods was characterised by single crystal structure determination. This has a 3D polymeric structure with lead(II) ions linked by carboxylate bridges to form an infinite stack of (PbO4)(n) units. These layers are connected to adjacent layers by an infinite number of parallel C(CH2)(7)C chains arranged perpendicularly to the stacks. The lead(II) ions display an unusual 7-fold coordination. The first direct evidence that the 'protrusions' encountered in aged traditional lead-containing oil paints contain lead soaps is reported. Their mechanism of formation is discussed. (C) 2003 Elsevier Ltd. All rights reserved.",

keywords = "lead soaps, hydrothermal, palmitic acid, stearic acid, red lead, lead-tin yellow, C-13, NMR",

author = "Plater, {Michael John} and {de Silva}, {B. M.} and T. Glebrich and Hursthouse, {M. B.} and Higgitt, {C. L.} and Saunders, {D. R.}",

year = "2003",

doi = "10.1016/S0277-5387(03)00461-3",

language = "English",

volume = "22",

pages = "3171--3179",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Limited",

number = "22",

}

TY - JOUR

T1 - The characterisation of lead fatty acid soaps in 'protrusions' in aged traditional oil paint.

AU - Plater, Michael John

AU - de Silva, B. M.

AU - Glebrich, T.

AU - Hursthouse, M. B.

AU - Higgitt, C. L.

AU - Saunders, D. R.

PY - 2003

Y1 - 2003

N2 - Lead(II) carboxylate soaps of two fatty acids, palmitic (C15H31COOH) and stearic acids (C17H35COOH), and a dicarboxylic acid, azelaic acid (HOOCC7H14COOH), have been synthesised and characterised by FTIR spectroscopy. These acids are all encountered in aged traditional oil paint, the azelaic acid resulting from the oxidative degradation of unsaturated fatty acids in the oil. Lead(II) azelate synthesised by hydrothermal methods was characterised by single crystal structure determination. This has a 3D polymeric structure with lead(II) ions linked by carboxylate bridges to form an infinite stack of (PbO4)(n) units. These layers are connected to adjacent layers by an infinite number of parallel C(CH2)(7)C chains arranged perpendicularly to the stacks. The lead(II) ions display an unusual 7-fold coordination. The first direct evidence that the 'protrusions' encountered in aged traditional lead-containing oil paints contain lead soaps is reported. Their mechanism of formation is discussed. (C) 2003 Elsevier Ltd. All rights reserved.

AB - Lead(II) carboxylate soaps of two fatty acids, palmitic (C15H31COOH) and stearic acids (C17H35COOH), and a dicarboxylic acid, azelaic acid (HOOCC7H14COOH), have been synthesised and characterised by FTIR spectroscopy. These acids are all encountered in aged traditional oil paint, the azelaic acid resulting from the oxidative degradation of unsaturated fatty acids in the oil. Lead(II) azelate synthesised by hydrothermal methods was characterised by single crystal structure determination. This has a 3D polymeric structure with lead(II) ions linked by carboxylate bridges to form an infinite stack of (PbO4)(n) units. These layers are connected to adjacent layers by an infinite number of parallel C(CH2)(7)C chains arranged perpendicularly to the stacks. The lead(II) ions display an unusual 7-fold coordination. The first direct evidence that the 'protrusions' encountered in aged traditional lead-containing oil paints contain lead soaps is reported. Their mechanism of formation is discussed. (C) 2003 Elsevier Ltd. All rights reserved.

KW - lead soaps

KW - hydrothermal

KW - palmitic acid

KW - stearic acid

KW - red lead

KW - lead-tin yellow

KW - C-13

KW - NMR

U2 - 10.1016/S0277-5387(03)00461-3

DO - 10.1016/S0277-5387(03)00461-3

M3 - Article

SN - 0277-5387

VL - 22

SP - 3171

EP - 3179

JO - Polyhedron

JF - Polyhedron

IS - 22

ER -

The characterisation of lead fatty acid soaps in 'protrusions' in aged traditional oil paint.

Abstract

Keywords

Access to Document

Fingerprint

Cite this