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Cavallini M.,CNR Institute of Nanostructured Materials
Physical Chemistry Chemical Physics

Spin crossover compounds are a class of functional materials able to switch their spin state upon external stimuli. They were proposed as potential candidates for several technological applications that require highly controlled thin films and patterns. Here we present a critical overview of the most important approaches for thin film growth and patterning of spin-crossover compounds, giving special attention to Fe(ii) based molecules, which are the most studied materials. We present both conventional approaches to thin film growth (Langmuir-Blodgett, constructive chemical approach, spin coating, drop casting and vacuum sublimation) and patterning (combined top-down/bottom-up method, soft and unconventional lithography). We critically discuss the application of thin film growth and fabrication techniques highlighting the most critical aspects and the perspectives opened by the recent progress. This journal is © 2012 the Owner Societies. Source

Scire S.,University of Catania | Liotta L.F.,CNR Institute of Nanostructured Materials
Applied Catalysis B: Environmental

This review intends to describe and critically analyze the growing literature dealing with the use of supported gold catalysts in the catalytic deep oxidation of volatile organic compounds (VOC). Among the wide family of VOC, attention has been given to the oxidation of saturated (methane, ethane, propane, isobutane, n-hexane) and unsaturated (acetylene, ethylene, propene) aliphatic compounds, aromatic hydrocarbons (benzene, toluene, xylenes, naphthalene), alcohols (methanol, ethanol, n- and iso-propanol), aldehydes (formaldehyde), ketones (acetone), esters (ethylacetate). Moreover, the oxidation of chlorinated VOC (dichloromethane, o-dichlorobenzene, o-chlorobenzene), as well as of nitrogen- (trimethylamine) and sulphur-containing (dimethyldisulfide) compounds has been addressed.The reaction mechanism and the influence of different factors, such as the nature and the properties of the support, the Au particle size and shape, the electronic state of gold, the preparation method and the pretreatment conditions of catalysts, the nature and the concentration of the organic molecule, are discussed in detail. © 2012 Elsevier B.V.. Source

Brucale M.,CNR Institute of Nanostructured Materials | Schuler B.,University of Zurich | Samori B.,University of Bologna
Chemical Reviews

Single-molecule techniques have started to provide important new types of information on the structural and dynamic behavior of intrinsically disordered proteins (IDPs). All single-molecule experiments are by definition able to avoid ensemble averaging since they give information on the smallest possible subensembles of a population. Two of the key strengths of the approaches are their ability to resolve structural and dynamic heterogeneity and to provide quantitative information that can be used for testing physical models. The single-molecule fluorescence approaches available, ranging from Förster Resonance Energy Transfer (FRET) to Positron Emission Topography (PET) and (FCS), can provide information on intra and intermolecular distances and, even more importantly, distance distributions, dynamics on time scales from nanoseconds to seconds, and changes in molecular size or dimensions. Combination of single-molecule fluorescence and ionic current measurements in single-ion channels was developed to monitor structural changes in single channels. Source

Ciriminna R.,CNR Institute of Nanostructured Materials | Pagliaro M.,CNR Institute of Nanostructured Materials
Chemical Society Reviews

The sol-gel approach to encapsulate fragrance and aroma chemicals in porous silica-based materials has the potential to afford odorant and flavoured materials with novel and unique beneficial properties. Amorphous sol-gel SiO2 is non-toxic and safe, whereas the sol-gel entrapment of delicate chemicals in its inner pores results in pronounced chemical and physical stabilization of the entrapped actives, thereby broadening the practical utilization of chemically unstable essential oils. Reviewing progress in the fabrication of diverse odorant and flavoured sol-gels, we show how different synthetic strategies afford advanced materials suitable for practical application with important health and environmental benefits. © 2013 The Royal Society of Chemistry. Source

Gentili D.,CNR Institute of Nanostructured Materials | Cavallini M.,CNR Institute of Nanostructured Materials
Coordination Chemistry Reviews

Coordination compounds have been applied in many fields of technology, such as electronics, optics and optoelectronics, information storage, sensing and magnetism. These materials are designed to incorporate a variety of functional properties, and at the same time are gifted with functional groups that control their interactions and assembly in the solid state. In order to integrate coordination compounds in solid-state devices, the control of their assembly should not only be at the molecular level but also at different length scales since the precise positioning and size-control of the individual assembled structures are needed. In this direction, wet-lithographic techniques play a key role in the manufacture and application of micro- and nanostructures based on soluble coordination compounds. This review provides an overview of wet-lithographic methods applied to patterning of coordination compounds, highlighting some of the recent advances and the major criticisms. The first part is focused on probe-assisted methods while the second part is focused on stamp-assisted ones. Eventually, a section on the combination of wet and conventional lithographic methods is presented. © 2013 Elsevier B.V. Source

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