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Issue 7, 2014
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Environmental and complexation effects on the structures and spectroscopic signatures of organic pigments relevant to cultural heritage: the case of alizarin and alizarin–Mg(ii)/Al(iii) complexes

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Abstract

An integrated computational approach allowed an unbiased analysis of optical and structural properties of alizarin-based pigments, which can be directly compared with experimental results. Madder lake pigments have been modeled by Mg(II)- and Al(III)-coordinated alizarin taking into account solvation and metal-linkage effects, responsible for colour modifications. Moreover, different environmental conditions have been analyzed for free alizarin, showing in all cases semi-quantitative agreement with experimental spectroscopic data (UV-VIS). Our results point out the ability of in silico approaches to unravel the subtle interplay of stereo-electronic, dynamic, and environmental effects in tuning the physico-chemical properties of pigments relevant to cultural heritage.

Graphical abstract: Environmental and complexation effects on the structures and spectroscopic signatures of organic pigments relevant to cultural heritage: the case of alizarin and alizarin–Mg(ii)/Al(iii) complexes

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Article information


Submitted
02 Feb 2013
Accepted
29 Nov 2013
First published
02 Dec 2013

Phys. Chem. Chem. Phys., 2014,16, 2897-2911
Article type
Paper

Environmental and complexation effects on the structures and spectroscopic signatures of organic pigments relevant to cultural heritage: the case of alizarin and alizarin–Mg(II)/Al(III) complexes

L. Carta, M. Biczysko, J. Bloino, D. Licari and V. Barone, Phys. Chem. Chem. Phys., 2014, 16, 2897
DOI: 10.1039/C3CP50499A

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