Circularly polarized luminescence reveals interaction between commercial stains and protein matrices used in paintings. Issue 98 (10th October 2016)

• Record Type: Journal Article
• Authors: Orsini, Sibilla; Zinna, Francesco; Biver, Tarita; Di Bari, Lorenzo; Bonaduce, Ilaria
• Is Part Of: RSC advances. Volume 6:Issue 98(2016)
• Page Start: 96176
• Page End: 96181
• Publication Date: 2016-10-10
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra14795j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Here we show that circularly polarized luminescence (CPL) can give unique insight into interactions between fluorescent commercial stains and protein-based materials used in painting. CPL can complement information from ECD and fluorescence. Abstract : Chemistry is at the front line of preservation of work of arts. Reliable but simple protocols for localizing proteins in art samples are necessary to guide conservators in their work. In this article, we investigated the interaction between some commonly used fluorescent stains and protein-based paint binders. Beside fluorescence, we used for the first time circularly polarized luminescence (CPL) as a tool to reveal interactions in complex matrices relevant for the field of cultural heritage. We show that, in such cases, CPL provides unique information compared to more common techniques such as fluorescence and circular dichroism. These findings will contribute to provide a rational base to empirical observations in staining procedures, even in arduous and complex cases.