Cel The proposed project is to prepare new molecules and materials which show efficient near-infrared luminescence, in the 1000 - 1500nm region, following excitation using long wavelength excitation in the 400 -1000nm region. Long-wavelength luminescence from lanthanides such as Yb(lll), Nd(lll), Pr(lll) and Er(lll) is of interest for applications varying from in vivo luminescent biomedical sensors to optical amplifiers in fibre-optic telecommunications networks, but in molecular compounds is usually stimulate d by UV excitation of aromatic ligands.In this project, heteropolynuclear complexes will be prepared in which d-block chromophoric complexes, having intense absorption maxima at longer wavelengths (400 - 1000nm), will be connected to luminescent lanthani des by short bridging ligands which will permit rapid energy-transfer between the components. Thus, excitation of the d-block chromophore will result in sensitised luminescence in the near-infrared region from the lanthanide using wavelengths longer than h as previously been possible.Two distinct approaches will be taken to the construction of appropriate materials. Firstly, discrete molecules will be prepared using a 'complexes as ligands' approach in which the d-block and f-block components are attached to a single bridging ligand in a stepwise manner. Secondly, coordination polymers will be prepared by co-crystallisation of anionic d-block chromophores (e.g. polypyridyl-cyanometallate complexes) with the desired lanthanide cations, to give solid-state materials.The viability of both methods has been demonstrated by the applicants in preliminary experiments. The heteronuclear d-f complexes can be constructed with careful choice of d-block component, bridging ligand, and f-block component to optimise the photophysical properties of the complexes and generate new materials of interest for sensing and opto-electronic applications. Dziedzina nauki natural scienceschemical sciencesinorganic chemistryinorganic compoundsnatural sciencesearth and related environmental sciencesgeologymineralogycrystallographynatural scienceschemical sciencesinorganic chemistrytransition metalsnatural scienceschemical sciencespolymer sciencesnatural sciencesphysical sciencesopticslaser physics Program(-y) FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006 Temat(-y) MOBILITY-2.3 - Marie Curie Incoming International Fellowships (IIF) Zaproszenie do składania wniosków FP6-2002-MOBILITY-7 Zobacz inne projekty w ramach tego zaproszenia System finansowania IIF - Marie Curie actions-Incoming International Fellowships Koordynator THE UNIVERSITY OF SHEFFIELD Wkład UE Brak danych Adres Firth Court, Western Bank SHEFFIELD Zjednoczone Królestwo Zobacz na mapie Linki Strona internetowa Opens in new window Koszt całkowity Brak danych