Abstract:
:Carminic acid, a natural hydrophilic dye extensively used in the food and cosmetic industries, is converted in hydrophobic dyes by acetylation or pivaloylation. These derivatives are successfully used as biocolourants for rubber objects. In this paper, spectroscopic properties of the carminic acid derivatives in dimethyl sulfoxide and in polybutylacrylate are studied by means of photoluminescence and time-resolved photoluminescence decays, revealing a hypsochromic effect due to the presence of bulky substituents as the acetyl or pivaloyl groups. Molecular mechanics and density functional theory calculations confirm the disruption of planarity between the sugar ring and the anthraquinoid system determined by the esterification.
journal_name
R Soc Open Scijournal_title
Royal Society open scienceauthors
Gabrielli L,Origgi D,Zampella G,Bertini L,Bonetti S,Vaccaro G,Meinardi F,Simonutti R,Cipolla Ldoi
10.1098/rsos.172399subject
Has Abstractpub_date
2018-07-04 00:00:00pages
172399issue
7issn
2054-5703pii
rsos172399journal_volume
5pub_type
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