Stabilization of the Tensile Strength of Aged Cellulose Paper by Cholinium-Amino Acid Ionic Liquid Treatment

Scarpellini, Eleonora; Ortolani, Michele; Nucara, A.; Baldassarre, Leonetta; Missori, Mauro; Fastampa, R; Caminiti, Ruggero

doi:10.1021/acs.jpcc.6b06845

Cited by 20 publications

(14 citation statements)

References 55 publications

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“…One of the most striking applications is certainly in the domain of BCultural Heritage^and regards the use of cholinium glycine to stabilize the cellulose structure, preserve its tensile strength, and prevent its oxidation (Scarpellini et al 2016). Indeed, the study of mid-infrared spectra of artificially aged papers, non-treated and pre-treated with the IL, showed that the carbonyl peaks, that are used to quantify the degree of oxidation/acidification of cellulose, have lower intensity in ILpretreated samples than those in non-treated ones.…”

Section: And Old Paper Preservationmentioning

confidence: 99%

Choline-amino acid ionic liquids: past and recent achievements about the structure and properties of these really “green” chemicals

Gontrani

2018

Biophys Rev

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The structure of choline-amino acid ionic liquids, atoxic task-specific solvents composed of materials originated from renewable feedstocks, is reviewed in this letter. The varied and strong interactions that these liquids are capable of establishing are largely dependent on their structure and confer them outstanding solvating properties with respect to a large number of different solutes. Among the experimental methods capable of yielding structural insight, the energy-dispersive version of X-Ray diffraction, that uses the Bremsstrahlung radiation of the X-Ray tube, is a technique very well suited to investigate these liquid systems. The diffraction spectra of five choline-amino acid ionic liquids, recently measured, are reported and discussed; in particular, the presence or absence of the medium-range order pre-peak is related to the presence of polar groups within the amino acid side chain that destroys the hydrophobic interactions between aliphatic chains. In the final section, a recent example of choline-amino acid ionic liquids as for ancient paper preservation and two other interesting results are discussed at the end.

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Section: And Old Paper Preservationmentioning

confidence: 99%

Choline-amino acid ionic liquids: past and recent achievements about the structure and properties of these really “green” chemicals

Gontrani

2018

Biophys Rev

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“…The advantages in the synthesis of CAAILs are their byproduct water which can be used completely, and low cost of CAAILs compared to imidazolium-based ILs and other bio-based ILs prioritizes its application in biomolecular sciences. 34−36 Recently synthesized CAAILs have been used mostly in catalysis, old paper preservation, 37 biosensor, 38 and proton conduction, 39,40 In addition, ethidium bromide (EB) and 4′,6-diamidino-2phenylindole (DAPI) dyes (see Figure S4) were used that bind with DNA as intercalator and groove binder, respectively, to have a comparative understanding of the unique interaction of DNA with CAAILs. We hope this work will provide intriguing physical insights on the role of bio ILs for safe storage and application of DNA.…”

Section: ■ Introductionmentioning

confidence: 99%

Critical Assessment of the Interaction between DNA and Choline Amino Acid Ionic Liquids: Evidences of Multimodal Binding and Stability Enhancement

et al. 2018

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Long-term storage and stability of DNA is of paramount importance in biomedical applications. Ever since the emergence of ionic liquids (ILs) as alternate green solvents to aqueous and organic solvents, their exploration for the extraction and application of DNA need conscientious understanding of the binding characteristics and molecular interactions between IL and DNA. Choline amino acid ILs (CAAILs) in this regard seem to be promising due to their non-cytotoxic, completely biobased and environment-friendly nature. To unravel the key factors for the strength and binding mechanism of CAAILs with DNA, various spectroscopic techniques, molecular docking, and molecular dynamics simulations were employed in this work. UV–Vis spectra indicate multimodal binding of CAAILs with DNA, whereas dye displacement studies through fluorescence emission confirm the intrusion of IL molecules into the minor groove of DNA. Circular dichorism spectra show that DNA retains its native B-conformation in CAAILs. Both isothermal titration calorimetry and molecular docking studies provide an estimate of the binding affinity of DNA with CAAILs ≈ 4 kcal/mol. The heterogeneity in binding modes of CAAIL-DNA system with evolution of time was established by molecular dynamics simulations. Choline cation while approaching DNA first binds at surface through electrostatic interactions, whereas a stronger binding at minor groove occurs via van der Waals and hydrophobic interactions irrespective of anions considered in this study. We hope this result can encourage and guide the researchers in designing new bio-ILs for biomolecular studies in future.

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“…Indeed, cellulose polymers in elementary fibers assembly through H bonds in crystalline and disordered (amorphous) regions. Indeed, the monotonic increase of the absorption is typically observed in the THz spectra of amorphous solids by H-bond networks [20,41]. At the THz spectral regions these absorption spectra can be approximated by:…”

Section: Resultsmentioning

confidence: 99%

Quantitative diagnostics of ancient paper using THz time-domain spectroscopy

Missori

Pawcenis

Bagniuk

et al. 2018

Microchemical Journal

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In this work we have studied the terahertz spectra of modern artificially aged and ancient paper samples using terahertz time-domain spectroscopy. Hydrothermal artificial ageing was performed in closed and open reactors. Ancient paper samples were produced during the 15 th century in European countries. The main aim of the work is the quantitative assessment of spectral feature observed by terahertz spectroscopy as a function of degradation. To this goal, the state of degradation of paper samples was characterized by crystallinity measurements obtained by using X-ray diffraction and by the degree of polymerization of cellulose polymers obtained by size exclusion chromatography. The behavior of the terahertz spectra was formerly investigated as a function of the hydration of paper samples. This allowed discriminating between the spectral features induced by the presence of water and those induced by degradation of paper. Results indicate clear dependences of spectral parameters from the evolution of crystallinity and the degree of polymerization. They can be used as a nondestructive analytical method to assess the state of degradation of ancient paper by terahertz spectroscopy.

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Stabilization of the Tensile Strength of Aged Cellulose Paper by Cholinium-Amino Acid Ionic Liquid Treatment

Cited by 20 publications

References 55 publications

Choline-amino acid ionic liquids: past and recent achievements about the structure and properties of these really “green” chemicals

Choline-amino acid ionic liquids: past and recent achievements about the structure and properties of these really “green” chemicals

Critical Assessment of the Interaction between DNA and Choline Amino Acid Ionic Liquids: Evidences of Multimodal Binding and Stability Enhancement

Quantitative diagnostics of ancient paper using THz time-domain spectroscopy

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