Preparation of photonic molecular trains via soft-crystal polymerization of lanthanide complexes

Pedro Paulo Ferreira da Rosa, Yuichi Kitagawa, Sunao Shoji, Hironaga Oyama, Keisuke Imaeda, Naofumi Nakayama, Koji Fushimi, Hidehiro Uekusa, Kosei Ueno, Hitoshi Goto and Yasuchika Hasegawa ()
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Pedro Paulo Ferreira da Rosa: Hokkaido University
Yuichi Kitagawa: Hokkaido University
Sunao Shoji: Hokkaido University
Hironaga Oyama: Tokyo Institute of Technology
Keisuke Imaeda: Hokkaido University
Naofumi Nakayama: CONFLEX Corporation
Koji Fushimi: Hokkaido University
Hidehiro Uekusa: Tokyo Institute of Technology
Kosei Ueno: Hokkaido University
Hitoshi Goto: Toyohashi University of Technology
Yasuchika Hasegawa: Hokkaido University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Soft-crystals are defined as flexible molecular solids with highly ordered structures and have attracted attention in molecular sensing materials based on external triggers and environments. Here, we show the soft-crystal copolymerization of green-luminescent Tb(III) and yellow-luminescent Dy(III) coordination centers. Soft-crystal polymerization is achieved via transformation of monomeric dinuclear complexes and polymeric structures with respect to coordination number and geometry. The structural transformation is characterized using single-crystal and powder X-ray diffraction. The connected Tb(III) crystal-Dy(III) crystal show photon energy transfer from the Dy(III) centre to the Tb(III) centre under blue light excitation (selective Dy(III) centre excitation: 460 ± 10 nm). The activation energy of the energy transfer is estimated using the temperature-dependent emission lifetimes and emission quantum yields, and time-dependent density functional theory (B3LYP) calculations. Luminescence-conductive polymers, photonic molecular trains, are successfully prepared via soft-crystal polymerization on crystal media with remarkable long-range energy migration.

Date: 2022
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DOI: 10.1038/s41467-022-31164-z

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