44 research outputs found
Metal grids with high-porous surface as structured catalysts: preparation, characterization and activity in propane total oxidation
Reflectance indices as a diagnostic tool for weed control performed by multipurpose equipment in precision agriculture
N-substituted-2-oxo-(2H)1-benzopyran-3-carboxamide derivatives with analgesic and/or diuretic activities
Poster: Programming Rules by Demonstration in Virtual Reality
This paper proposes a solution based on programming-by-demonstration supporting the definition of rules for configuring the behaviour of Virtual Reality environments by end users. The interface allows end users to record the interaction and demonstrate the updates in an immersive mode. After the recording phase, it segments the updates and asks the user to identify which ones are useful for the rule definition and which are not. Finally, the user graphically separates the selected updates into triggers and actions, obtaining the desired configuration rules
8-Quinolinolate complexes of yttrium and ytterbium: molecular arrangement and fragmentation under laser impact
Switching-on luminescence in anilate-based molecular materials
A simple change of one chloro substituent on the chloranilate ligand with a cyano group dramatically affects the electronic properties of the anilate moiety inducing unprecedented luminescence properties in the class of anilate-based ligands and their metal complexes. Here we report on the optimized synthesis and full characterization, including photoluminescence, of the chlorocyananilate ligand (ClCNAn(2-)) (dianion of the 3-chloro-6-cyano-2,5-dihydroxybenzoquinone, H2ClCNC6O4), a unique example of a heterosubstituted anilate ligand whose electronic properties, optical properties and coordination chemistry have never been investigated to date, even though it has been known since 1966. The synthesis and full characterization of its tris-chelated metal complexes with Cr(iii), Fe(iii), and Al(iii) metal ions are also described herein. These complexes, formulated as [A]3[M(III)(ClCNAn)3] (A = (n-Bu)4N(+) or Ph4P(+); M(III) = Cr (), Fe (), Al ()), are isostructural. While and are potential molecular building blocks for the preparation of molecule-based magnets or paramagnetic conducting organic-inorganic hybrid systems, , instead, where the coordinated Al(iii) metal ions retain the luminescence of the ligand, represents a unique building block to achieve heterobimetallic assemblies showing emissive properties under visible light irradiation
Fully efficient direct Yb-to-Er energy transfer at molecular level in a near-infrared emitting heterometallic trinuclear quinolinolato complex
Combined chemical/photophysical studies on the mixed Yb–Er trinuclear lanthanide quinolinolato compound Yb2ErQ9 and on the corresponding Yb3Q9 analogue have been performed. In the mixed-metal molecular species, the ligands, acting as a bridge, allow the two metals to lie at optimal distance for direct Yb-to-Er resonance energy transfer, which reaches nearly unitary efficiency. The obtained results show that polynuclear lanthanide complexes provide a suitable strategy for achieving effective erbium sensitization in solution-processable molecular materials