Typologie d'actualités: Group Luminescent lanthanide compounds, optical spectroscopy and bioimaging

Pure and stable white light

Current white light sources, such as LEDs, tend to oscillate between different color variations, which distorts the perception of the human eye. This limitation can be very disabling, even dangerous, during surgery or in the work of graphic designers and artists.

Researchers from the Center for Molecular Biophysics and the University of Michigan (United States) have developed a new system, based on dysprosium atoms and metallacrowns, which gives exactly white light that does not vary with conditions wear or temperature.

This work has been published in the Journal of the American Chemical Society.

See the information on the CNRS Institute of Chemistry website.

Organometallic networks for the near-infrared emission of lanthanides

Researchers from the group "Luminescent lanthanide compounds, spectroscopy and optical bioimaging" and the University of Pittsburgh (USA) have designed a rigid three-dimensional chemical system of organometallic network type composed of lanthanides and organic molecules. A major originality of this work is based on the use of the cavity of this network to generate in situ the molecular system sensitizing the lanthanide cations. This new approach has the advantage, among other things, of allowing the excitation length to be controlled. This network is well suited to the real conditions of optical biomedical imaging on living cells.

See the news on the CNRS website

These researches have been published on Journal of American Chemical Society

Patrick F. Muldoon, Guillaume Collet, Svetlana V Eliseeva, Tian-Yi Luo, Stephane Petoud, and Nathaniel L Rosi. Ship-in-a-bottle preparation of long wavelength molecular antennae in lanthanide metal-organic frameworks for biological imaging. J. Am. Chem. Soc. (2020) 142, 8776-8781 - doi : 10.1021/jacs.0c01426