clemence.allain [at] (Laboratory PPSM)

Seminar by Professor Ph.D. Yasuchika Hasegawa (Hokkaido's University)

Image of Lanthanide coordination structure
Lanthanide coordination structure
Ph.D. Yasuchika Hasegawa of the University of Hokkaido in Japan is invited from 17 to 21 June 2019 by the research laboratory "Supramolecular and Macromolecular Photophysics and Photochemistry" (PPSM) - ENS Paris Saclay.
He will give a seminar on June 20 at 11am in the ENS Chemla amphi (Cachan - France).
ENS - Chemla amphi
Add to my Calendar06/20/2019 11:00am 06/20/2019 12:00pm Seminar by Professor Ph.D. Yasuchika Hasegawa (Hokkaido's University) ENS - Chemla amphi Europe/Paris public

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.


" We have reported on luminescent Eu(III) and Tb(III) coordination polymers. 1) One-, two-, and three-dimensional alternating polymeric sequences of lanthanide ions and organic ligands exhibit remarkable characteristics as novel organic materials with various structures, and unique physical properties.2) Herein, I introduce recent lanthanide coordination polymers connected with liner, zig-zag and planer join aryls.

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.