Towards hydrophobic carminic acid derivatives and their incorporation in polyacrylates.

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 Sci

authors

Gabrielli L,Origgi D,Zampella G,Bertini L,Bonetti S,Vaccaro G,Meinardi F,Simonutti R,Cipolla L

doi

10.1098/rsos.172399

subject

Has Abstract

pub_date

2018-07-04 00:00:00

pages

172399

issue

7

issn

2054-5703

pii

rsos172399

journal_volume

5

pub_type

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