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Vibrational Sum-Frequency-Generation (SFG) Spectroscopy Study of the Structural Assembly of Cellulose Microfibrils in Reaction Woods
Abstract not provided
Structure and Reactivity of Alkyl Ethers Adsorbed on CeO2(111) Model Catalysts
The effect of surface hydroxyls on the adsorption of ether on ceria was explored. Adsorption of dimethyl ether (DME) and diethyl ether (DEE) on oxidized and reduced CeO{sub 2}(111) films was studied and compared with Ru(0001) using RAIRS and sXPS within a UHV environment. On Ru(0001) the ethers adsorb weakly with the molecular plane close to parallel to the surface plane. On the ceria films, the adsorption of the ethers was stronger than on the metal surface, presumably due to stronger interaction of the ether oxygen lone pair electrons with a cerium cation. This interaction causes the ethers to tilt away from the surface plane compared to the Ru(0001) surface. No pronounced differences were found between oxidized (CeO{sub 2}) and reduced (CeOx) films. The adsorption of the ethers was found to be perturbed by the presence of OH groups on hydroxylated CeOx. In the case of DEE, the geometry of adsorption resembles that found on Ru, and in the case of dimethyl ether DME is in between that one found on clean CeOx and the metal surface. Decomposition of the DEE was observed on the OH/CeOx surface following high DEE exposure at 300 K and higher temperatures. Ethoxides and acetates were identified as adsorbed species on the surface by means of RAIRS and ethoxides and formates by s-XPS. No decomposition of dimethyl ether was observed on the OH/CeOx at these higher temperatures, implying that the dissociation of the C-O bond from ethers requires the presence of {beta}-hydrogen.
Structural Basis for Potent Neutralization of Betacoronaviruses by Single-Domain Camelid Antibodies
Abstract not provided
Flame-Based Synthesis of Core-Shell Structures Using Pd-Ru and Pd Cores
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Effect of Ti4+ on the structure of nepheline (NaAlSiO4) glass
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Structure-activity relationship of ipglycermide binding to phosphoglycerate mutases
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Synthesis, characterization, and nanoindentation response of single crystal Fe–Cr–Ni alloys with FCC and BCC structures
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Structural analysis of Mycobacterium tuberculosis M13 metalloprotease Zmp1 open states
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Structure-guided design of a perampanel-derived pharmacophore targeting the SARS-CoV-2 main protease
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Densification of Ionic Liquid Molecules within a Hierarchical Nanoporous Carbon Structure Revealed by Small Angle Scattering and Molecular Dynamics Simulation
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Identifying the Structure of the Intermediate, Li 2/3 CoPO 4 , Formed during Electrochemical Cycling of LiCoPO 4
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Pore Structure and Bifunctional Catalyst Activity of Overlayers Applied by Atomic Layer Deposition on Copper Nanoparticles
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Structures of Delithiated and Degraded LiFeBO3, and Their Distinct Changes upon Electrochemical Cycling
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