Publications (16) View all
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Article: Photocatalytic NOx abatement: the role of the material supporting the TiO2 active layer.
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ABSTRACT: The importance of the choice of a suitable substrate as supporting material for photoactive TiO(2), either in the form of powders or thin films or in photoactive paints, is frequently disregarded. In this paper four different supports (stainless steel, sand-blasted stainless steel, Teflon and glass) are object of investigation. The final aim is to verify the presence of interactions between the photocatalyst (AEROXIDE(®) TiO(2) P25 by Evonik Degussa Corporation) and the support, directly involved in the photocatalytic activity in the NO(x) abatement. The characterization results have been correlated with the photoactivity of the different samples. In particular, a coating of about 6-9 μm seems to allow a photocatalytic result free from any positive or negative interference with the supporting material, therefore giving reliable results about the photoactivity of the TiO(2) under investigation.Journal of hazardous materials 11/2011; 211-212:203-7. · 4.14 Impact Factor -
Article: Site-selective assembly between 1,8-diiodoperfluorooctane and 4,7,8,11-tetraazahelicene driven by halogen bonding
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ABSTRACT: The X-ray diffraction analysis on single crystals obtained from the self-assembly of 1,8-diiodoperfluorooctane 1 with the tetraazahelicene derivative 2 revealed a site-selective pattern of halogen bonds (XBs) in the solid state. Indeed, two non-equivalent XBs drive the formation of an indefinitely repeating pentameric (1)3·(2)2 unit. Interestingly, the N…I–C bonding formation occurred selectively on the pyridazinic/cinnolinic nitrogen atoms of the tetraazahelicene unit, which were preferred over the pyridinic/quinolinic ones. On the basis of molecular electrostatic potential and molecular orbital analyses, DFT calculations predicted and explained well this site-selective XB formation, thus demonstrating to be efficient tools for the prediction of the XB site selectivity in similar polynitrogen systems.Supramolecular Chemistry. 03/2011; 23(3–4):256-262. -
Article: Halide anions driven self-assembly of haloperfluoroarenes: Formation of one-dimensional non-covalent copolymers
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ABSTRACT: The supramolecular organization in six solid assemblies involving iodo- and bromoperfluoroarene derivatives is described. Single crystal X-ray analyses show that the formation of the supramolecular architectures is controlled by I−⋯Br–ArF, I−⋯I–ArF, Br−⋯I–ArF, and Cl−⋯I–ArF halogen bondings thus proving the X−⋯X′–ArF supramolecular synthon, where X can be the same as or different from X′, is particularly robust. In five of the described architectures halide anions form two halogen bondings and form infinite chains wherein dihaloperfluoroarenes, which function as bidentate electron acceptors, and halide anions, which function as bidentate electron donors, alternate. This behaviour shows halide anions have a fair tendency to work as bidentate halogen bonding acceptors.Journal of Fluorine Chemistry 12/2009; 130(12):1171-1177. · 2.03 Impact Factor -
Article: Halogen bonding-based anion coordination in calixarene/inorganic halide/diiodoperfluorocarbon assemblies
Supramolecular Chemistry 01/2009; 21(1-2):149-156. · 2.14 Impact Factor -
Article: Tuning second-order NLO responses through halogen bonding.
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ABSTRACT: As a function of the ability of the solvent to behave as acceptor of halogen bonding, the NLO-phores under study give rise to microbeta(lambda) values ranging from +192 x 10(-48) esu to -465 x 10(-48) esu.Chemical Communications 08/2007; · 6.17 Impact Factor
