M1 早坂裕哉君 (Yuya Hayasaka) の TADF 挙動を示す強発光性ターピリジン誘導体に関する「Highly luminescent π-conjugated terpyridine derivatives exhibiting thermally activated delayed fluorescence」と題する Chemistry A European Journal に Hot paper および Inside cover として掲載された論文が、「Highly Luminescent Terpyridines」のタイトルで、ChemistryViews で紹介されました。
Highly Luminescent Terpyridines, By Stuart Beardsworth
There has been a lot of research focused on luminescent materials. However, there still is a need for more efficient luminescent materials for specific applications. Many approaches adapt well-known materials as building blocks for improving device applications. Terpyridine is a good example of such a building block: First synthesized in 1932, it has since been used in versatile roles, e.g., as a tridentate metal ligand, in fluorescent probes and sensor technology, as well as in supramolecular materials.
Junji Kido, Hisahiro Sasabe, and colleagues, Yamagata University, Japan, have developed terpyridine-derived luminescent materials which display strong thermally activated delayed fluorescence (TADF). This process can allow materials to be used in organic light emitting devices (OLEDs) with increased efficiencies. For TADF to occur, the materials have to have a sufficiently small energy difference between the singlet and triplet excited states, which requires careful choices of the donor (D) and acceptor (A) moieties. The researchers used density functional theory (DFT) calculations to find the most suitable D–A combinations.
