Interpreting the near-infrared reflectance of a series of perylene pigments

B. Kaur; S.N. Bhattacharya; D.J. Henry

doi:10.1016/j.dyepig.2013.06.004

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Interpreting the near-infrared reflectance of a series of perylene pigments

Journal article

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Interpreting the near-infrared reflectance of a series of perylene pigments

B. Kaur, S.N. Bhattacharya and D.J. Henry

Dyes and Pigments, Vol.99(2), pp.502-511

2013

DOI: https://doi.org/10.1016/j.dyepig.2013.06.004

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Abstract

Near-infrared (NIR) reflecting pigments offer the potential to incorporate thermal insulating qualities into paint coatings. Experimental reflectance measurements are presented of a series of perylene based pigments, revealing significant variations in the NIR region as a function of derivatisation and substitution. Theoretical methods are applied to account for the observed trends. Derivatisation of perylene leads to an extension of the π-aromatic system, resulting in a bathochromic shift of UV/Vis absorption maxima towards the NIR region. However, this is insufficient to account for the observed variations in NIR reflectance. In comparison, overtones and combination modes of fundamental IR vibrations appear to be more important in explaining the observed variations in NIR reflectance/absorbance. Aromatic groups lead to a small number of intense NIR bands, while alkyl groups generally lead to a greater number of less intense NIR bands. However, neighbouring group effects and/or a molecular dipole moment can substantially alter the intensity of these bands.

Details

Title: Interpreting the near-infrared reflectance of a series of perylene pigments
Authors/Creators: B. Kaur (Author/Creator) - RMIT University
S.N. Bhattacharya (Author/Creator) - RMIT University
D.J. Henry (Author/Creator) - Murdoch University
Publication Details: Dyes and Pigments, Vol.99(2), pp.502-511
Publisher: Elsevier BV
Identifiers: 991005545446907891
Copyright: © 2013 Elsevier Ltd.
Murdoch Affiliation: School of Chemical and Mathematical Science; School of Veterinary and Life Sciences
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration
Citation topics: 2 Chemistry; 2.114 Organic Semiconductors; 2.114.61 Organic Solar Cells
Web Of Science research areas: Chemistry, Applied; Engineering, Chemical; Materials Science, Textiles
ESI research areas: Chemistry