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Title: Reaction of Pb(II) and Zn(II) with Ethyl Linoleate To Form Structured Hybrid Inorganic–Organic Complexes: A Model for Degradation in Historic Paint Films

Abstract

To investigate soap formation in drying oils in historic paints, the reaction between metal acetates (K +, Zn 2+, Pb 2+) and ethyl linoleate (EL) was studied using optical microscopy, X-ray powder diffraction, and electron microscopy. Pb(II) and Zn(II) react rapidly with EL to form highly structured, spherulitic, luminescent crystallites that aggregate. Evidence from Fourier transform infrared (FTIR) and scanning electron microscopy/energy dispersive X-ray analysis and high-resolution synchrotron powder X-ray diffraction indicates that these are organic–inorganic hybrid complexes or coordination polymers. FTIR absorbance peaks at ca. 1540 cm –1 for Pb(II) and ca. 1580 cm –1 for Zn(II) are consistent with the formation of carboxylate complexes. The complexes formed offer insight into the degradation processes observed in oil paint films, suggesting that soap formation is rapid when metal ions are solubilized and can occur with unsaturated fatty acids that are present in fresh oils. These complexes may account for the atypical luminescence observed in lead-containing cured oil paint films.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1324814
Resource Type:
Journal Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Volume: 1; Journal Issue: 3; Journal ID: ISSN 2470-1343
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

MacDonald, Margaret G., Palmer, Michael R., Suchomel, Matthew R., and Berrie, Barbara H. Reaction of Pb(II) and Zn(II) with Ethyl Linoleate To Form Structured Hybrid Inorganic–Organic Complexes: A Model for Degradation in Historic Paint Films. United States: N. p., 2016. Web. doi:10.1021/acsomega.6b00075.
MacDonald, Margaret G., Palmer, Michael R., Suchomel, Matthew R., & Berrie, Barbara H. Reaction of Pb(II) and Zn(II) with Ethyl Linoleate To Form Structured Hybrid Inorganic–Organic Complexes: A Model for Degradation in Historic Paint Films. United States. doi:10.1021/acsomega.6b00075.
MacDonald, Margaret G., Palmer, Michael R., Suchomel, Matthew R., and Berrie, Barbara H. Fri . "Reaction of Pb(II) and Zn(II) with Ethyl Linoleate To Form Structured Hybrid Inorganic–Organic Complexes: A Model for Degradation in Historic Paint Films". United States. doi:10.1021/acsomega.6b00075.
@article{osti_1324814,
title = {Reaction of Pb(II) and Zn(II) with Ethyl Linoleate To Form Structured Hybrid Inorganic–Organic Complexes: A Model for Degradation in Historic Paint Films},
author = {MacDonald, Margaret G. and Palmer, Michael R. and Suchomel, Matthew R. and Berrie, Barbara H.},
abstractNote = {To investigate soap formation in drying oils in historic paints, the reaction between metal acetates (K+, Zn2+, Pb2+) and ethyl linoleate (EL) was studied using optical microscopy, X-ray powder diffraction, and electron microscopy. Pb(II) and Zn(II) react rapidly with EL to form highly structured, spherulitic, luminescent crystallites that aggregate. Evidence from Fourier transform infrared (FTIR) and scanning electron microscopy/energy dispersive X-ray analysis and high-resolution synchrotron powder X-ray diffraction indicates that these are organic–inorganic hybrid complexes or coordination polymers. FTIR absorbance peaks at ca. 1540 cm–1 for Pb(II) and ca. 1580 cm–1 for Zn(II) are consistent with the formation of carboxylate complexes. The complexes formed offer insight into the degradation processes observed in oil paint films, suggesting that soap formation is rapid when metal ions are solubilized and can occur with unsaturated fatty acids that are present in fresh oils. These complexes may account for the atypical luminescence observed in lead-containing cured oil paint films.},
doi = {10.1021/acsomega.6b00075},
journal = {ACS Omega},
issn = {2470-1343},
number = 3,
volume = 1,
place = {United States},
year = {2016},
month = {9}
}

Works referencing / citing this record:

Lead( ii ) soaps: crystal structures, polymorphism, and solid and liquid mesophases
journal, January 2017

  • Martínez-Casado, F. J.; Ramos-Riesco, M.; Rodríguez-Cheda, J. A.
  • Physical Chemistry Chemical Physics, Vol. 19, Issue 26
  • DOI: 10.1039/c7cp02351k

Revealing the Distribution of Metal Carboxylates in Oil Paint from the Micro‐ to Nanoscale
journal, July 2019


Characterization of Zinc Carboxylates in an Oil Paint Test Panel
journal, September 2019