http://www.cnr.it/ontology/cnr/individuo/prodotto/ID33479
Tert-butyl amine borane complex: An unusual application of a reducing agent on model molecules of cellulose based materials (Articolo in rivista)
- Type
- Label
- Tert-butyl amine borane complex: An unusual application of a reducing agent on model molecules of cellulose based materials (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Alternative label
C. Sanna, A. Sodo, G. Laguzzi, G. Mancini, M. Bicchieri (2009)
Tert-butyl amine borane complex: An unusual application of a reducing agent on model molecules of cellulose based materials
in Journal of cultural heritage
(literal)
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- C. Sanna, A. Sodo, G. Laguzzi, G. Mancini, M. Bicchieri (literal)
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- ISI Web of Science (WOS) (literal)
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- Istituto di Metodologie Chimiche, CNR. Laboratorio di Chimica, Istituto Centrale per la Patologia del Libro. Dipartimento di Fisica, Università di Roma Tre (literal)
- Titolo
- Tert-butyl amine borane complex: An unusual application of a reducing agent on model molecules of cellulose based materials (literal)
- Abstract
- The need to preserve cultural heritage on paper requires the setting up of methods and treatments that can be applied to original documents.
The cellulose main degradation processes are hydrolysis and oxidation. Only the first one has been widely investigated. The Istituto Centrale per
la Patologia del Libro (ICPL) focused its attention on oxidation phenomena and studied a particular class of reducing agents, namely the boraneamine
complexes. During the investigation it was found that the borane tert-butylamine complex, besides being the most promising reducing
agent, was also able to react with carboxylic functions. In the present study 1H and 13C NMR, Pulsed field gradient NMR spectroscopy as well as
Raman spectroscopy were used as analytical tools to disclose the mechanism of the interaction between the borane tert-butylamine complex and
the carboxylic functions. Given the complexity of the paper/environment interactions and the subsequent degradation phenomena, we worked on
simplified models based on small carbohydrate molecules in order to reproduce the behavior of degraded paper after reductive restoration. Modified
D-glucose and D-cellobiose were used in this first step in order to set up the analytical methods before approaching more complex systems such
as microcrystalline cellulose and paper. Our results give the experimental evidence that borane tert-butylamine complex is also able to neutralize
acidic functions. This finding has important perspectives in paper restoration. (literal)
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