Seminar by Professor Ph.D. Yasuchika Hasegawa (Hokkaido's University)
He will give a seminar on June 20 at 11am in the ENS Chemla amphi (Cachan - France).
Ph.D. Yasuchika Hasegawa, Professor Division of Materials Chemistry, Graduate School of Engineering, of the University of Hokkaido in Japan give a seminar : "Luminescent lanthanide coordination polymers with characteristic luminescenceproperties."
Luminescent lanthanide coordination polymers composed of lanthanide ions and organic joint ligands exhibit characteristic photophysical and thermostable properties that are different from typical organic dyes, luminescent metal complexes, and semiconductor nanoparticles.
Lanthanide coordination polymers with bend-angle joint ligands such as a thiophen part show sterically zig-zag polymer-chain conformations, resulting in high emission quantum yields and photosensitized energy transfer efficiencies.3) I found that the high photosensitized energy transfer efficiencies should be linked with polymeric tight-packing structures and formation of energy transfer assisted LLCT (ligand to ligand charge transfer) bands. We also observed effective photo-, electro- tribo-luminescence of two-dimensional lanthanide coordination polymers with triangular joint ligands.4, 5) Their photophysical observations were achieved using close packing structures of Eu(III) coordination polymer. Recently, we have also reported on chiral Eu(III) coordination polymers with characteristic CPL (circular polarized luminescence). 6) The effective molecular design of lanthanide coordination polymers are expected to open-up a new frontier of photo-functional polymer science."
1) K. Miyata, Y. Hasegawa et al, Angew. Chem. Int. Ed. 2013, 52, 6413.
2) Review: Y. Hasegawa, T. Nakanishi, RSC Advances 2015, 5, 338-353.
3) Y. Hirai, Y. Hasegawa, Y. et al. Angew. Chem. Int. Ed. 2016, 55, 12059.
4) Y. Hirai, Hasegawa, Y. et al. Angew. Chem. Int. Ed. 2017, 56, 7171.
5) Y. Hasegawa, et al. Chem. Eur. J. 2017, 23, 2666., Chem. Eur. J. 2018, in press.
6) Y. Hasegawa, et al. Chem. Comm. 2018, in press, Sci.Rep. 2018 in press.