Trapping at the Solid−Gas Interface: Selective Adsorption of Naphthalene by Montmorillonite Intercalated with a Fe(III)− Phenanthroline Complex
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American Chemical Society
Date
2019-04-29Referencia bibliográfica
Castellini, E., Malferrari, D., Bernini, F., Sainz Diaz, C. I., Mucci, A., Sola, M., ... & Borsari, M. (2019). Trapping at the Solid–Gas Interface: Selective Adsorption of Naphthalene by Montmorillonite Intercalated with a Fe (III)–Phenanthroline Complex. ACS omega, 4(4), 7785-7794.
Sponsorship
The authors are thankful to the University of Modena and Reggio Emilia for FAR 2016 funding program (PAsTIME Project, grant number: FAR2016DIPBORSARI), for the Visiting Professor program, and for the facilities provided by the Centro Interdipartimentale Grandi Strumenti, to MIUR for funding program FFABR 2017, to the Computational Centre of University of Granada and CINECA of Bologna for the high-performance computing service, and to the Andalusian project RMN1897 and the Spanish projects FIS2013-48444- C2-2-P and FIS2016-77692-C2-2-P for financial support.Abstract
In this study, stable hybrid materials (Mt−Fe(III)Phen),
made by the μ-oxo Fe(III)−phenanthroline complex [(OH2)3(Phen)-
FeOFe(Phen)(OH2)3]4+ (Fe(III)Phen) intercalated in different amounts
into montmorillonite (Mt), were used as a trap for immobilizing gaseous
benzene and naphthalene and their mono chloro-derivatives at 25 and 50
°C. The entrapping process was studied through elemental analysis, magic
angle spinning NMR spectroscopy, thermal analysis, and evolved gas mass
spectrometry. Naphthalene and 1-chloronaphthalene were found to be
immobilized in large amount at both temperatures. Molecular modeling
allowed designing of the structure of the interlayer in the presence of the
immobilized aromatic molecules. Adsorption is affected by the amount of
the Fe complex hosted in the interlayer of the entrapping hybrid materials.
On the contrary, under the same conditions, benzene and chlorobenzene
were not adsorbed. Thermal desorption of naphthalenes was obtained
under mild conditions, and immobilization was found to be reversible at least for 20 adsorption/desorption cycles