Thermo-sensitive seven-coordinate Tb(III) complexes with ethynyl groups in phosphine oxide ligand

Pedro Paulo Ferreira da Rosa, Yuichi Kitagawa, Takayuki Nakanishi, Koji Fushimi, Yasuchika Hasegawa

2018年光化学討論会、関西学院大学、兵庫県西宮市

2018年9月5日~7日

Recently, I attended the Annual Meeting on Photochemistry 2018 for an oral presentation. I was very happy and honored to receive the Journal of Photochemistry and Photobiology C: Photochemistry Reviews Presentation Prize in such annual meeting; the most important conference for Photochemistry in Japan and known worldwide. It was an inspiring moment in my scientific life to receive this award among several respected and renowned researches, especially the first place. In this award, I would like to thank my advisor, Professor Hasegawa, and all the Professors in our laboratory that are always contributing my work with helpful and thrilling discussions.

              In this study, I investigated the addition of ethynyl groups in phosphine oxide ligand in seven-coordinate Tb(III) complexes. By changing the electronic structure of the phosphine oxide ligand, induced by the ethynyl group, I expected to promote interaction between ligands in order to create the necessary quenching path for thermo-sensibility. Thermo-sensibility was accomplished in those complexes when ethynyl group was added. Unexpectedly, the total quantum yield of the [Tb(tmh)₃(PEB)] complex was 71%. Finally, this complex is expected to be applied in future photonic thermo-sensor devices because of its high luminescence and sensitivity to temperature.