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Solid-state NMR as a Powerful Tool to Characterize Polysaccharide-based Systems

2017
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Release : 2017
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Book Synopsis Solid-state NMR as a Powerful Tool to Characterize Polysaccharide-based Systems by : Francesco D'Acierno

Download or read book Solid-state NMR as a Powerful Tool to Characterize Polysaccharide-based Systems written by Francesco D'Acierno. This book was released on 2017. Available in PDF, EPUB and Kindle. Book excerpt: An accurate structural characterization of polysaccharide-based systems is crucial in understanding the properties of the materials. Among all the characterization techniques, solid-state NMR spectroscopy proves to be fundamental for a clear picture of complex polysaccharide-based systems. An example of complexity in these systems is represented by disordered structures. Polysaccharides with large fractions of amorphous regions can be analyzed using 1H-13C cross-polarization (CP) magic-angle-spinning (MAS) to resolve their molecular sites. The same experiment can be applied to biochars obtained by thermal degradation of biopolymers to quantitatively characterize the forms of carbon present, in combination with direct polarization (DP) MAS to determine the size of the carbonaceous char clusters. Solid-state NMR is also effective in the structural characterization of porous materials. Some polysaccharides, such as chitin, self-assemble in mesoporous architectures directly in nature, while for others, such as cellulose, reduction to a nanocrystalline form is required to obtain these types of networks. Mesoporous polysaccharide-based materials can often be used as templates to create inorganic materials with complementary porosity, such as alumina aerogels, which can be exploited as catalyst supports, absorbents, or thermal insulators. Solid-state NMR enables the structural characterization of the biotemplated materials, when the corresponding isotope is NMR-sensitive. In this presentation, I will discuss our use of solid-state NMR techniques to probe the structures of new materials developed from biopolymers. This technique gives insight into the structure of the materials that is not available from other analytical methods.

Solid State NMR

2017 Science
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Release : 2017
Genre : Science
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Book Synopsis Solid State NMR by : Maria Ines Bruno

Download or read book Solid State NMR written by Maria Ines Bruno. This book was released on 2017. Available in PDF, EPUB and Kindle. Book excerpt: The nuclear magnetic resonance (NMR) spectroscopy is a very powerful tool in the chemical characterization, both in solution and in solid state. With the development of NMR spectrometers more potent field, employing radio frequency pulse, provided the development of studies on materials, especially amorphous materials. Thus, there was a need to develop techniques to obtain spectra in solid state with high resolution in comparison to those obtained in solution. Therefore, the study of polymers and polymeric materials could be developed quickly as a result a lot of information about the structure-property could be obtained with more details. The use of NMR in the solid state has become particularly important in the study of amorphous materials, as well as in the study of crystal structures, and permits us to detect different constituents present in material. This chapter covers the basic solid-state NMR techniques that provide important information on sample molecular behavior because they are powerful and versatile tools to evaluate polymer and complex materials like nanomaterials.

Solid-State NMR in Materials Science

2016-04-19 Science
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Release : 2016-04-19
Genre : Science
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Book Rating : 642/5 ( reviews)

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Book Synopsis Solid-State NMR in Materials Science by : Vladimir I. Bakhmutov

Download or read book Solid-State NMR in Materials Science written by Vladimir I. Bakhmutov. This book was released on 2016-04-19. Available in PDF, EPUB and Kindle. Book excerpt: Solid-state NMR is a powerful physical method widely applied in modern fundamental and applied science, medicine, and industry. Its role is particularly valuable in materials chemistry due to the capability of solid-state NMR to rapidly solve tasks connected with structural descriptions of complex systems on macro and/or molecular levels, and the i

Solid State NMR Spectroscopy for Biopolymers

2006-08-05 Science
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Release : 2006-08-05
Genre : Science
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Book Rating : 031/5 ( reviews)

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Book Synopsis Solid State NMR Spectroscopy for Biopolymers by : Hazime Saitô

Download or read book Solid State NMR Spectroscopy for Biopolymers written by Hazime Saitô. This book was released on 2006-08-05. Available in PDF, EPUB and Kindle. Book excerpt: ‘‘Biopolymers’’ are polymeric materials of biological origin, including globular, membrane, and fibrous proteins, polypeptides, nucleic acids, po- saccharides, lipids, etc. and their assembly, although preference to respe- ive subjects may be different among readers who are more interested in their biological significance or industrial and/or medical applications. Nevert- less, characterizing or revealing their secondary structure and dynamics may be an equally very important and useful issue for both kinds of readers. Special interest in revealing the 3D structure of globular proteins, nucleic acids, and peptides was aroused in relation to the currently active Structural Biology. X-ray crystallography and multidimensional solution NMR sp- troscopy have proved to be the standard and indispensable means for this purpose. There remain, however, several limitations to this end, if one intends to expand its scope further. This is because these approaches are not always straightforward to characterize fibrous or membrane proteins owing to extreme difficulty in crystallization in the former, and insufficient spectral resolution due to sparing solubility or increased effective molecular mass in the presence of surrounding lipid bilayers in the latter.

Solid State NMR

2021-06-23 Science
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Release : 2021-06-23
Genre : Science
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Book Rating : 115/5 ( reviews)

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Book Synopsis Solid State NMR by : Klaus Müller

Download or read book Solid State NMR written by Klaus Müller. This book was released on 2021-06-23. Available in PDF, EPUB and Kindle. Book excerpt: Solid State NMR A thorough and comprehensive textbook covering the theoretical background, experimental approaches, and major applications of solid-state NMR spectroscopy Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful non-destructive technique capable of providing information about the molecular structure and dynamics of molecules. Alongside solution-state NMR, a well-established technique to study chemical structures and investigate physico-chemical properties of molecules in solutions, solid-state NMR (SSNMR) offers many exciting possibilities for the analysis of solid and soft materials across scientific fields. SSNMR shows unique capabilities for a detailed investigation of structural and dynamic properties of materials over wide space and time ranges. For this reason, and thanks to significant advances in the past several years, the application of SSNMR to materials is rapidly increasing in disciplines such as chemistry, physics, and materials and life sciences. Solid State NMR: Principles, Methods, and Applications offers a systematic introduction to the theory, methodological concepts, and major experimental methods of SSMR spectroscopy. Exploring the unique potential of SSNMR for the structural and dynamic characterization of soft and either amorphous or crystalline solid materials, this comprehensive textbook provides foundational knowledge and recent developments of SSNMR, covering physical and theoretical background, experimental methods, and applications to pharmaceuticals, polymers, inorganic and hybrid materials, liquid crystals, and model membranes. Written by two expert authors to ensure a clear and consistent presentation of the subject, this textbook: Includes a brief introduction to the historical aspects and broad theoretical background of solid-state NMR spectroscopy Provides helpful illustrations to explain the various SSNMR concepts and methods Features accessible descriptive text with self-consistent use of quantum mechanics Covers the experimental aspects of SSNMR spectroscopy and in particular a description of many useful pulse sequences Contains references to relevant literature Solid State NMR: Principles, Methods, and Applications is the ideal textbook for university courses on SSNMR, advanced spectroscopies, and a valuable single-volume reference for spectroscopists, chemists, and researchers in the field of materials.

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