Investigation of Dipolar-Mediated Water−Protein Interactions in Microcrystalline Crh by Solid-State NMR Spectroscopy

2006 ◽  
Vol 128 (25) ◽  
pp. 8246-8255 ◽  
Author(s):  
Anne Lesage ◽  
Lyndon Emsley ◽  
François Penin ◽  
Anja Böckmann
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Protein Interactions ◽  
Solid State Nmr ◽  
Solid State Nmr Spectroscopy

Lysine-Capped Silica Nanoparticles: A Solid-State NMR Spectroscopy Study

MRS Advances ◽  
2016 ◽  
Vol 1 (31) ◽  
pp. 2261-2266 ◽  
Author(s):  
Chengchen Guo ◽  
Gregory P. Holland ◽  
Jeffery L. Yarger
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Silica Nanoparticles ◽  
Protein Interactions ◽  
Solid State Nmr ◽  
Silanol Group ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Solid State Nmr Spectroscopy ◽  
Fumed Silica Nanoparticles

ABSTRACTTo achieve the goal of biocompatibility in nano-based materials we must first obtain a fundamental understanding of the physical and chemical behavior of biomolecules at the interfaces of nanomaterials. A first step towards understanding protein interactions with nanomaterials is to understand how individual amino acids interact at the interfaces. In this paper, we investigated the lysine adsorption behavior on fumed silica nanoparticles by solid-state NMR spectroscopy. We use 1H, 13C and 15N solid-state magic angle spinning (MAS) NMR techniques to elucidate how lysine is adsorbed on silica nanoparticles surfaces via strong hydrogen-bonding interaction between the protonated side-chain amine group and silanol group on silica nanoparticles surfaces.*

scholarly journals A New Methodological Approach to Correlate Protective and Microscopic Properties by Soft X-ray Microscopy and Solid State NMR Spectroscopy: The Case of Cusa’s Stone

2021 ◽  
Vol 11 (13) ◽  
pp. 5767
Author(s):  
Veronica Ciaramitaro ◽  
Alberto Spinella ◽  
Francesco Armetta ◽  
Roberto Scaffaro ◽  
Emmanuel Fortunato Gulino ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Methodological Approach ◽  
Polymer Chains ◽  
General Question ◽  
Protective Agent ◽  
Vapour Permeability ◽  
X Ray ◽  
Solid State Nmr Spectroscopy

Hydrophobic treatment is one of the most important interventions usually carried out for the conservation of stone artefacts and monuments. The study here reported aims to answer a general question about how two polymers confer different protective performance. Two fluorinated-based polymer formulates applied on samples of Cusa’s stone confer a different level of water repellence and water vapour permeability. The observed protection action is here explained on the basis of chemico-physical interactions. The distribution of the polymer in the pore network was investigated using scanning electron microscopy and X-ray microscopy. The interactions between the stone substrate and the protective agents were investigated by means of solid state NMR spectroscopy. The ss-NMR findings reveal no significant changes in the chemical neighbourhood of the observed nuclei of each protective agent when applied onto the stone surface and provide information on the changes in the organization and dynamics of the studied systems, as well as on the mobility of polymer chains. This allowed us to explain the different macroscopic behaviours provided by each protective agent to the stone substrate.

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