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A Pleural Effusion Model in Rats by Intratracheal Instillation of Polyacrylate/Nanosilica
Published on: April 12, 2019
Towards hydrophobic carminic acid derivatives and their incorporation in polyacrylates
Luca Gabrielli1, Davide Origgi1, Giuseppe Zampella1
1Department of Biotechnology and Biosciences, University of Milan-Bicocca, P.zza della Scienza 2, 20126 Milan, Italy.
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.
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