Applications of NMR to problems in art conservation

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" Applications of NMR to problems in art conservation "
Jacob M. Newman A. Jerschow

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	53362
Doc. No	:	TL23316
Call number	:	‭3330152‬
Main Entry	:	Jacob M. Newman
Title & Author	:	Applications of NMR to problems in art conservation\ Jacob M. Newman
College	:	New York University
Date	:	2008
Degree	:	Ph.D.
student score	:	2008
Page No	:	115
Abstract	:	The area of art conservation presents many interesting problems in analytical chemistry. This work describes studies of four applications of nuclear magnetic resonance to problems in art conservation. A new double quantum filtered internal DOSY NMR experiment was developed and tested on mixtures of nucleic acids and of long chain organic molecules. The method allows for a "virtual separation" of complex mixtures by NMR in a relatively fast and simple method. Solid state NMR was used to examine the mechanism and properties of the acid degradation of ultramarine blue, an aluminosilicate zeolite of the sodalite family, derived from the mineral lapis lazuli. Acid treatment of ultramarine leads to framework degradation and chromophore destruction in a concentration and time dependent manner. Millimolar acid concentration causes chromophore destruction while higher concentrations cause framework destruction. Also, solid state NMR was used to support the identification, by vibrational spectroscopy and computation, of a chromophore present only in lapis lazuli from Afghanistan. Finally, unilateral NMR relaxometry was used to identify oil stains on paper. T 2 relaxation measurements can be used to identify linseed oil from among non-oxidizable food oils.
Subject	:	Pure sciences; NMR; Sodalite; Ultramarine blue; Unilateral NMR; Art conservation; Dosy; Analytical chemistry; 0486:Analytical chemistry
Added Entry	:	A. Jerschow
Added Entry	:	New York University