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Title: Indigo in the nanochannels of zeolite L : towards a new type of colorant
Authors : Woodtli, Pascal
Giger, Sandro
Müller, Patrick
Sägesser, Lucie
Zucchetto, Nicola
Reber, Michael
Ecker, Achim
Brühwiler, Dominik
Published in : Dyes and pigments
Volume(Issue) : 149
Pages : 456
Pages to: 461
Publisher / Ed. Institution : Elsevier
Issue Date: 2018
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Indigo; Zeolite; Nanochannel; Host-Guest; Intercalation; Reductive washing
Subject (DDC) : 540: Chemistry
660: Chemical engineering
Abstract: A host-guest based colorant was synthesized by intercalating indigo molecules into the nanochannels of zeolite L (ZL). Reductive washing thereby ensured the efficient and selective removal of non-intercalated indigo molecules. The UV-vis diffuse reflectance spectrum of the product after intercalation and reductive washing (designated as indigo-ZL) was found to resemble the solution spectrum of indigo, leading to the conclusion that the formation of indigo aggregates is prevented due to the steric constraints imposed by the microporous structure of ZL. The application of indigo-ZL on cotton was tested by roll coating. The light absorption properties of the resulting textile prints showed no significant alteration when compared to the pure indigo-ZL powder. The UV-vis diffuse reflectance spectra of mixtures consisting of indigo-ZL and a further ZL-based colorant were successfully predicted by the weighted addition of the respective primary spectra.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1016/j.dyepig.2017.10.029
ISSN: 0143-7208
Restricted until : 2019-11-06
Appears in Collections:Publikationen Life Sciences und Facility Management

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