Donatella Capitani | Consiglio Nazionale delle Ricerche (CNR) (original) (raw)
Papers by Donatella Capitani
European Polymer Journal, Nov 1, 1993
Macromolecules, May 1, 1998
Journal of Polymer Science Part a Polymer Chemistry, Oct 12, 2010
In the present paper we combined two different non-destructive techniques to detect the water con... more In the present paper we combined two different non-destructive techniques to detect the water content spatial variation in a porous material. The main goal of this work was to verify the ability of radar “early time” signals, using the proton density values measured with the unilateral NMR (Nuclear Magnetic Resonance) technique, in order to detect the spatial distribution of water in the subsurface of a concrete slab. This site was chosen because it was the best compromise between an uniform, porous and slow drainage material and the antenna-coupling, affected only by the surface permittivity variations due to the change in water content. The GPR (Ground Penetrating Radar) survey has been conducted using a bistatic radar unit (Sensors & Software, Inc) operating at 1000 MHz; on the other hand, NMR data were collected using portable unilateral NMR operating at 16.3 MHz. The results obtained in this paper confirm that the “early time” radar signal and the NMR response can be applied to estimate some physical properties of both natural and man-made materials. In fact, the data show a matching pattern of the water distribution in the shallow part of the slab measured by GPR and NMR, and a very high correlation coefficient between the radar signal amplitude and the NMR signal integral. Finally, the results highlight the importance of this new combined approach to evaluate different physical parameters at the same time.
Macromolecules, 1992
A marked shortening of T I relaxations in solid aromatic polymers can be attributed to O2 adsorbe... more A marked shortening of T I relaxations in solid aromatic polymers can be attributed to O2 adsorbed on the aromatic rings. This effect, observed as a function of temperature, is modulated by the amount of adsorbed 02, which, in turn, varies according to the molecular packing and crystaUine/amorphous ratio. Within the temperature range 77-400 K, semicrystalline syndiotactic polystyrenes (s-PS) in the a, 8, and y polymorph modifications were studied by pulse lH NMR at 30 MHz. Due to the presence of many relaxation components, 1,2,2-trideuterio-s-PS was synthesized, crystallized, and characterized by X-ray powder diffraction. At low temperature, when both the 0 2 diffusion and the spin-diffusion processes are slow enough, the backbone-deuteriated polymers exhibit multiple T I relaxations: three for a and j3 s-PS and two for y s-PS. These T l components are attributed to crystalline and amorphous phases. From the study of these components as a function of temperature and from direct comparison of TI values in the different phases, the following conclusions were drawn: (i) Clear differentiation was possible between different s-PS polymorphs. (ii) Determination of the crystalline vs amorphous ratio fully consistent with X-ray diffraction data was achieved. (iii) The amorphous component of different semicrystalline s-PS polymorphs could be distinguished.
Inorg Chim Acta, 1998
A possible reaction route for Ir(H)(Cl2)(P-i-Pr3)3 (4) is proposed. The complexes [HP-i-Pr3]2[IrC... more A possible reaction route for Ir(H)(Cl2)(P-i-Pr3)3 (4) is proposed. The complexes [HP-i-Pr3]2[IrCl6] (1), [HP-i-Pr3]2[Ir2Cl8(P-i-Pr3)] (2) and [HP-i-Pr3][Ir2Cl7(P-i-Pr3)2] (3) were investigated. It is shown that 1, 2 and 3 are possible intermediates in the synthesis of 4. Crystallographic data are as follows: for 1 (at 298 K), , space group P2i/n; for 2 (at 298 K), , space group P21/c, for 3 (at 298 K), , space group P21/c.
J Non Cryst Solids, 2001
Samples of impactite glass, known as Libyan Desert Glass (LDG), were analyzed by NMR MAS in order... more Samples of impactite glass, known as Libyan Desert Glass (LDG), were analyzed by NMR MAS in order to study the coordination of silicon and aluminum. In all samples, silicon was observed in a fourfold coordination. A very small amount of aluminum in fourfold, ®vefold and sixfold coordinations was also observed in the three studied samples. The occurrence of ®ve and six coordinated aluminum may be due to high pressure eects or due to the presence of Al-enriched micro-domains. Ó
Macromolecules, May 10, 2001
... Suh, BJ; Borsa, F.; Torgeson, DR J. Magn. Reson. 1994, A110, 58−61. (11) Santyr, GE; Henkelma... more ... Suh, BJ; Borsa, F.; Torgeson, DR J. Magn. Reson. 1994, A110, 58−61. (11) Santyr, GE; Henkelman, M.; Bronskill, MJ J. Magn. Reson. 1988, 79, 28. [CAS]. (12) Kurland, RJ; Ngo, FQ H. J. Magn. Reson. 1986, 73, 425. (13) Sykora ...
Carbohydrate Polymers, Aug 1, 2003
A new type of hyaluronan based polymeric network has been prepared applying the well known cross-... more A new type of hyaluronan based polymeric network has been prepared applying the well known cross-linking processes based on aqueous Ugi condensation reactions. In this study lysine has been used as a cross-linking agent. The structural and physico-chemical ...
Journal of Macromolecular Science Part a, 2008
This paper is dedicated to the memory of our friend and colleague Annalaura Segre.The chemical st... more This paper is dedicated to the memory of our friend and colleague Annalaura Segre.The chemical structure of a series of β (-)-pinene polymers (PBP) obtained by radiation-induced polymerization, free radical initiation, cationic polymerization over a Friedel-Craft catalyst and by coordinative polymerization over a Ziegler-Natta catalyst has been fully elucidated by H and C-NMR spectroscopy. 2D NMR techniques have been applied
Food Chemistry, 2016
Isotope Ratio Mass Spectrometry (IRMS), (1)H Nuclear Magnetic Resonance ((1)H NMR), conventional ... more Isotope Ratio Mass Spectrometry (IRMS), (1)H Nuclear Magnetic Resonance ((1)H NMR), conventional chemical analysis and chemometric elaboration were used to assess quality and to define and confirm the geographical origin of 177 Italian PDO (Protected Denomination of Origin) olive oils and 86 samples imported from Tunisia. Italian olive oils were richer in squalene and unsaturated fatty acids, whereas Tunisian olive oils showed higher δ(18)O, δ(2)H, linoleic acid, saturated fatty acids β-sitosterol, sn-1 and 3 diglyceride values. Furthermore, all the Tunisian samples imported were of poor quality, with a K232 and/or acidity values above the limits established for extra virgin olive oils. By combining isotopic composition with (1)H NMR data using a multivariate statistical approach, a statistical model able to discriminate olive oil from Italy and those imported from Tunisia was obtained, with an optimal differentiation ability arriving at around 98%.
The research line MOdihMA (MOisture detection in historical MAsonry) proposes to improve the inno... more The research line MOdihMA (MOisture detection in historical MAsonry) proposes to improve the innovative techniques recently developed to measure different parameters related to water content in masonry, that has an important role in the damage of historical buildings. The first objective of this project is to compare the effectiveness of the different methods in understanding how the quantitative data obtained are directly related to water content. The second objective of the MOdhiMa project is to compare the ability of the different techniques to map water as a function of its location and depth within the masonry structure, both on macro and micro-scale. A selection of these innovative techniques recently had an application on the “Sala delle Asse” in the Sforza Castle in Milan. The hall is famous for the decoration of the vault and the monochrome on the northwest wall, attributed to Leonardo. Recently Milano Municipality defined the plan of diagnostics for detecting the causes of the increasing damage on the painting and the poor conditions of conservation of the vault. Unilateral NMR, SUSI, IR Thermography, gravimetric and chemical tests were applied for mapping the moisture distribution in the bottom of the northwest wall. The comparison with the results of the standardized techniques confirmed the low moisture content distributed in the masonry.
XVII International Congress of Classical Archaeology, Rome; 09/2008
European Polymer Journal, Nov 1, 1993
Macromolecules, May 1, 1998
Journal of Polymer Science Part a Polymer Chemistry, Oct 12, 2010
In the present paper we combined two different non-destructive techniques to detect the water con... more In the present paper we combined two different non-destructive techniques to detect the water content spatial variation in a porous material. The main goal of this work was to verify the ability of radar “early time” signals, using the proton density values measured with the unilateral NMR (Nuclear Magnetic Resonance) technique, in order to detect the spatial distribution of water in the subsurface of a concrete slab. This site was chosen because it was the best compromise between an uniform, porous and slow drainage material and the antenna-coupling, affected only by the surface permittivity variations due to the change in water content. The GPR (Ground Penetrating Radar) survey has been conducted using a bistatic radar unit (Sensors & Software, Inc) operating at 1000 MHz; on the other hand, NMR data were collected using portable unilateral NMR operating at 16.3 MHz. The results obtained in this paper confirm that the “early time” radar signal and the NMR response can be applied to estimate some physical properties of both natural and man-made materials. In fact, the data show a matching pattern of the water distribution in the shallow part of the slab measured by GPR and NMR, and a very high correlation coefficient between the radar signal amplitude and the NMR signal integral. Finally, the results highlight the importance of this new combined approach to evaluate different physical parameters at the same time.
Macromolecules, 1992
A marked shortening of T I relaxations in solid aromatic polymers can be attributed to O2 adsorbe... more A marked shortening of T I relaxations in solid aromatic polymers can be attributed to O2 adsorbed on the aromatic rings. This effect, observed as a function of temperature, is modulated by the amount of adsorbed 02, which, in turn, varies according to the molecular packing and crystaUine/amorphous ratio. Within the temperature range 77-400 K, semicrystalline syndiotactic polystyrenes (s-PS) in the a, 8, and y polymorph modifications were studied by pulse lH NMR at 30 MHz. Due to the presence of many relaxation components, 1,2,2-trideuterio-s-PS was synthesized, crystallized, and characterized by X-ray powder diffraction. At low temperature, when both the 0 2 diffusion and the spin-diffusion processes are slow enough, the backbone-deuteriated polymers exhibit multiple T I relaxations: three for a and j3 s-PS and two for y s-PS. These T l components are attributed to crystalline and amorphous phases. From the study of these components as a function of temperature and from direct comparison of TI values in the different phases, the following conclusions were drawn: (i) Clear differentiation was possible between different s-PS polymorphs. (ii) Determination of the crystalline vs amorphous ratio fully consistent with X-ray diffraction data was achieved. (iii) The amorphous component of different semicrystalline s-PS polymorphs could be distinguished.
Inorg Chim Acta, 1998
A possible reaction route for Ir(H)(Cl2)(P-i-Pr3)3 (4) is proposed. The complexes [HP-i-Pr3]2[IrC... more A possible reaction route for Ir(H)(Cl2)(P-i-Pr3)3 (4) is proposed. The complexes [HP-i-Pr3]2[IrCl6] (1), [HP-i-Pr3]2[Ir2Cl8(P-i-Pr3)] (2) and [HP-i-Pr3][Ir2Cl7(P-i-Pr3)2] (3) were investigated. It is shown that 1, 2 and 3 are possible intermediates in the synthesis of 4. Crystallographic data are as follows: for 1 (at 298 K), , space group P2i/n; for 2 (at 298 K), , space group P21/c, for 3 (at 298 K), , space group P21/c.
J Non Cryst Solids, 2001
Samples of impactite glass, known as Libyan Desert Glass (LDG), were analyzed by NMR MAS in order... more Samples of impactite glass, known as Libyan Desert Glass (LDG), were analyzed by NMR MAS in order to study the coordination of silicon and aluminum. In all samples, silicon was observed in a fourfold coordination. A very small amount of aluminum in fourfold, ®vefold and sixfold coordinations was also observed in the three studied samples. The occurrence of ®ve and six coordinated aluminum may be due to high pressure eects or due to the presence of Al-enriched micro-domains. Ó
Macromolecules, May 10, 2001
... Suh, BJ; Borsa, F.; Torgeson, DR J. Magn. Reson. 1994, A110, 58−61. (11) Santyr, GE; Henkelma... more ... Suh, BJ; Borsa, F.; Torgeson, DR J. Magn. Reson. 1994, A110, 58−61. (11) Santyr, GE; Henkelman, M.; Bronskill, MJ J. Magn. Reson. 1988, 79, 28. [CAS]. (12) Kurland, RJ; Ngo, FQ H. J. Magn. Reson. 1986, 73, 425. (13) Sykora ...
Carbohydrate Polymers, Aug 1, 2003
A new type of hyaluronan based polymeric network has been prepared applying the well known cross-... more A new type of hyaluronan based polymeric network has been prepared applying the well known cross-linking processes based on aqueous Ugi condensation reactions. In this study lysine has been used as a cross-linking agent. The structural and physico-chemical ...
Journal of Macromolecular Science Part a, 2008
This paper is dedicated to the memory of our friend and colleague Annalaura Segre.The chemical st... more This paper is dedicated to the memory of our friend and colleague Annalaura Segre.The chemical structure of a series of β (-)-pinene polymers (PBP) obtained by radiation-induced polymerization, free radical initiation, cationic polymerization over a Friedel-Craft catalyst and by coordinative polymerization over a Ziegler-Natta catalyst has been fully elucidated by H and C-NMR spectroscopy. 2D NMR techniques have been applied
Food Chemistry, 2016
Isotope Ratio Mass Spectrometry (IRMS), (1)H Nuclear Magnetic Resonance ((1)H NMR), conventional ... more Isotope Ratio Mass Spectrometry (IRMS), (1)H Nuclear Magnetic Resonance ((1)H NMR), conventional chemical analysis and chemometric elaboration were used to assess quality and to define and confirm the geographical origin of 177 Italian PDO (Protected Denomination of Origin) olive oils and 86 samples imported from Tunisia. Italian olive oils were richer in squalene and unsaturated fatty acids, whereas Tunisian olive oils showed higher δ(18)O, δ(2)H, linoleic acid, saturated fatty acids β-sitosterol, sn-1 and 3 diglyceride values. Furthermore, all the Tunisian samples imported were of poor quality, with a K232 and/or acidity values above the limits established for extra virgin olive oils. By combining isotopic composition with (1)H NMR data using a multivariate statistical approach, a statistical model able to discriminate olive oil from Italy and those imported from Tunisia was obtained, with an optimal differentiation ability arriving at around 98%.
The research line MOdihMA (MOisture detection in historical MAsonry) proposes to improve the inno... more The research line MOdihMA (MOisture detection in historical MAsonry) proposes to improve the innovative techniques recently developed to measure different parameters related to water content in masonry, that has an important role in the damage of historical buildings. The first objective of this project is to compare the effectiveness of the different methods in understanding how the quantitative data obtained are directly related to water content. The second objective of the MOdhiMa project is to compare the ability of the different techniques to map water as a function of its location and depth within the masonry structure, both on macro and micro-scale. A selection of these innovative techniques recently had an application on the “Sala delle Asse” in the Sforza Castle in Milan. The hall is famous for the decoration of the vault and the monochrome on the northwest wall, attributed to Leonardo. Recently Milano Municipality defined the plan of diagnostics for detecting the causes of the increasing damage on the painting and the poor conditions of conservation of the vault. Unilateral NMR, SUSI, IR Thermography, gravimetric and chemical tests were applied for mapping the moisture distribution in the bottom of the northwest wall. The comparison with the results of the standardized techniques confirmed the low moisture content distributed in the masonry.
XVII International Congress of Classical Archaeology, Rome; 09/2008
![Research paper thumbnail of Analysis of organic residues on Sicilian prehistoric pottery via SEM-EDX and 1H NMR spectroscopy [Abstract]](https://attachments.academia-assets.com/47159154/thumbnails/1.jpg)
](ISA 2016, 41st International Symposium on Archaeometry. Book of Abstracts, p. 386
Microchemical Journal, Volume 135, November 2017, Pages 140-147 Insights into the diets of early... more Microchemical Journal, Volume 135, November 2017, Pages 140-147
Insights into the diets of early societies can be gained, indirectly, from the cultural evidence of artefacts related to
food procurement, preparation and consumption and human skeletal remains. However,more direct evidence for
dietary constituents derives from the identification of intact plant and animal remains collected during the excavations
but also from the exam of the amorphous remains of foodstuff associated with artefacts. Organic residues
adhering to the surface or absorbed into the porous fabric of an unglazed cooking vessel should provide important
information both about the usage of the vessel and dietary practices. This contribute deals with the results of a
combined analytical research via 1H-1H NMR 2D-TOCSY, ATR FT-IR and SEM-EDX on organic residues on pottery
from two Sicilian prehistoric sites of Monte Kronio and Sant'Ippolito. The goal was that to shed new light on the
use of certain ceramic shapes and infer some hypothesis about ancient dietary habits.