Efficient electrophilic catalysis of 1,5-anhydrocellobiitol hydrolysis by Al<sup>III</sup>; implications for the conservation of “rosin-alum” sized paper

Baty, John; Sinnott, Michael L.

doi:10.1039/b316417a

Cited by 10 publications

(7 citation statements)

References 6 publications

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“…Potassium alum has been recently applied as a double catalyst to convert simple sugars to hydroxymethylfurfural, via dehydration and isomerization [16]. Other works have found evidence of aluminum-catalysed hydrolysis of cellulose in paper treated with aluminum salts [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Comparative chemical investigations of alum treated archaeological wood from various museum collections

et al. 2021

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From the mid-1800s to the late 1960s, conservation by alum salts (KAl(SO4)2·12H2O—potassium aluminium sulphate), using various recipes, was a common method to prevent shrinkage and to strengthen waterlogged archaeological wooden objects. This method was mainly used in Scandinavia. The alum method appears to have also been applied to highly degraded archaeological waterlogged wood in other countries, for example in the U.S and Germany. Today, many of the archaeological wooden objects treated with alum show extreme deterioration and very low pH, which are attributed to the effects of the alum-treatment. This study investigated the extent of the current levels of chemical degradation in wooden objects conserved with alum salts at different points in time (1880s, 1930s and 1905–13) in order to understand their current condition and whether extent of degradation was in any way related to time of treatment, in an attempt to understand the rate of degradation. It was also an opportunity to compare the chemical state of preservation of alum-treated wood from different collections, as only the Oseberg collection has been intensively studied in this way up until now. Samples from historical wooden objects from the following collections were investigated and compared: the Dejbjerg collection (National Museum of Denmark in Copenhagen); the Oseberg collection (Museum of Cultural History, Oslo, Norway); the Glimmingehus collection (Swedish History Museum, Sweden). Analyses of lignocellulosic polymers and of inorganic compounds were undertaken to evaluate the chemical preservation of the wooden objects. The investigations were performed using a multi-analytical approach which consisted of: pH measurements, analytical pyrolysis (Py-GC/MS), X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM–EDS). It was possible to link the extent of degradation with time, on a general level but we found a great variability in the state of preservation of the wood also within the same collection. It is clear, however that alum-treated wood is more degraded than archaeological wood not treated with alum.

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Section: Introductionmentioning

confidence: 99%

Comparative chemical investigations of alum treated archaeological wood from various museum collections

et al. 2021

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“…However, the presence of metal ions in the Oseberg artefacts could also contribute to their degradation. There is some evidence that Al(III) can accelerate acid-catalysed hydrolysis of cellulose in paper [5,6]. Furthermore, X-radiographs have illustrated that some of the brass and iron fittings have corroded, causing migration of ionic iron and copper compounds into the wood, which can promote wood degradation via radical Fenton reactions [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Chemical analyses of extremely degraded wood using analytical pyrolysis and inductively coupled plasma atomic emission spectroscopy

Braovac

Tamburini

Łucejko

et al. 2016

Microchemical Journal

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“…Metal ions including Cu(II), Ni(II), Co(II), Al(III), and La(III) have been shown to accelerate the cleavage of disaccharides and other glycosides efficiently. , So far, studies on the hydrolysis of glycosides using metal ions have largely focused on substrates that provide a binding site for the metal ion close to the glycosidic bond to allow a nucleophilic attack of water on the anomeric carbon. This strategy, however, narrows the pool of substrates to glycosides with strong metal ligating properties and excludes many naturally occurring glycosides, such as disaccharides and oligosaccharides.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Binuclear Copper(II) Complexes for Glycoside Hydrolysis

et al. 2010

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Three binuclear copper(II) complexes were characterized as solids by X-ray diffraction and in solution by UV/vis spectrophotometric titration, and subsequently evaluated for their glycosidase-like activity. The structure analysis revealed comparable intermetallic Cu...Cu distances (approximately 3.5 A) for the complexes 2 and 3. Despite this similarity, the composition of the complexes differs significantly in aqueous solution as revealed by spectrophotometric titrations. The hydrolysis of selected nitrophenylglycopyranosides is up to 11,000-fold accelerated over background in the presence of the copper(II) complexes in 3-(cyclohexylamino)-1-propanesulfonic acid (CAPS) buffer at pH 10.5 and 30 degrees C.

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Efficient electrophilic catalysis of 1,5-anhydrocellobiitol hydrolysis by Al^III; implications for the conservation of “rosin-alum” sized paper

Cited by 10 publications

References 6 publications

Comparative chemical investigations of alum treated archaeological wood from various museum collections

Comparative chemical investigations of alum treated archaeological wood from various museum collections

Chemical analyses of extremely degraded wood using analytical pyrolysis and inductively coupled plasma atomic emission spectroscopy

Evaluating Binuclear Copper(II) Complexes for Glycoside Hydrolysis

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Efficient electrophilic catalysis of 1,5-anhydrocellobiitol hydrolysis by AlIII; implications for the conservation of “rosin-alum” sized paper

Cited by 10 publications

References 6 publications

Comparative chemical investigations of alum treated archaeological wood from various museum collections

Comparative chemical investigations of alum treated archaeological wood from various museum collections

Chemical analyses of extremely degraded wood using analytical pyrolysis and inductively coupled plasma atomic emission spectroscopy

Evaluating Binuclear Copper(II) Complexes for Glycoside Hydrolysis

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Efficient electrophilic catalysis of 1,5-anhydrocellobiitol hydrolysis by Al^III; implications for the conservation of “rosin-alum” sized paper