scholarly journals Synthesis, characterization and modeling of self-assembled porphyrin nanorods

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1346-1354 ◽  
Author(s):  
Danielle Laurencin ◽  
Pascal G. Yot ◽  
Christel Gervais ◽  
Yannick Guari ◽  
Sébastien Clément ◽  
...  

Porphyrin nanorods were prepared by ion-association between free-base meso 5,10,15,20-tetrakis-(4-[Formula: see text]-methylpyridinium)porphyrin cations and tetraphenylborate anions. The nanorods have variable lengths (up to a few micrometers long) and diameters ([Formula: see text]50–500 nm). Their structure at the molecular level was elucidated by combining multinuclear solid state NMR spectroscopy, synchrotron X-ray powder diffraction and DFT calculations.

2020 ◽  
Vol 8 (31) ◽  
pp. 16006-16017
Author(s):  
Jeffrey H. Xu ◽  
Ankur L. Jadhav ◽  
Damon E. Turney ◽  
Robert J. Messinger

Solid-state 27Al MAS NMR spectroscopy and DFT calculations reveal that intercalated AlCl4− anions exhibit a wide range of molecular geometries and environments, establishing that the intercalated graphite electrodes exhibit high extents of disorder.


2018 ◽  
Vol 1860 (5) ◽  
pp. 1162-1170 ◽  
Author(s):  
Andrej Kováčik ◽  
Alexander Vogel ◽  
Juliane Adler ◽  
Petra Pullmannová ◽  
Kateřina Vávrová ◽  
...  

2008 ◽  
Vol 112 (32) ◽  
pp. 12515-12523 ◽  
Author(s):  
Vladimir Brodski ◽  
René Peschar ◽  
Henk Schenk ◽  
Andreas Brinkmann ◽  
Ernst R. H. van Eck ◽  
...  

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.


2002 ◽  
Vol 50 (8) ◽  
pp. 1128-1130 ◽  
Author(s):  
Yuichi Tozuka ◽  
Atsutoshi Ito ◽  
Hiroko Seki ◽  
Toshio Oguchi ◽  
Keiji Yamamoto

Author(s):  
Rosa María Claramunt ◽  
María Dolores Santa María ◽  
Isabelle Forfar ◽  
Francisco Aguilar-Parrilla ◽  
María Minguet-Bonvehí ◽  
...  

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