Beckmann Rearrangement of15N-Cyclohexanone Oxime on Zeolites Silicalite-1, H-ZSM-5, and H-[B]ZSM-5 Studied by Solid-State NMR Spectroscopy

2006 ◽  
Vol 128 (46) ◽  
pp. 14812-14813 ◽  
Author(s):  
V. R. Reddy Marthala ◽  
Yijiao Jiang ◽  
Jun Huang ◽  
Wei Wang ◽  
Roger Gläser ◽  
...  
2009 ◽  
Vol 11 (25) ◽  
pp. 5134 ◽  
Author(s):  
Ana Belen Fernandez ◽  
Ines Lezcano-Gonzalez ◽  
Mercedes Boronat ◽  
Teresa Blasco ◽  
Avelino Corma

2021 ◽  
Vol 11 (13) ◽  
pp. 5767
Author(s):  
Veronica Ciaramitaro ◽  
Alberto Spinella ◽  
Francesco Armetta ◽  
Roberto Scaffaro ◽  
Emmanuel Fortunato Gulino ◽  
...  

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.


2021 ◽  
Vol 33 (2) ◽  
pp. 642-656
Author(s):  
Clayton J. Dahlman ◽  
Rhys M. Kennard ◽  
Piotr Paluch ◽  
Naveen R. Venkatesan ◽  
Michael L. Chabinyc ◽  
...  

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