Ono Toshikazu, Ishihama Kohei, Taema Ai, Harada Takunori, Furusho Kiyonao, Hasegawa Masashi, Nojima Yuki, Abe Masaaki, Hisaeda Yoshio
Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu Univerisy, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
Department of Integrated Science and Technology, Faculty of Science and Technology, Oita University, Dannoharu 700, Oita City, 870-1192, Japan.
Angew Chem Int Ed Engl. 2021 Feb 1;60(5):2614-2618. doi: 10.1002/anie.202011450. Epub 2020 Dec 1.
New chiroptical chromophores, dinuclear triple-stranded helicates, composed of tetradentate ligands with aluminum(III) ions, are described. These are synthesized in two steps using inexpensive pyrrole derivatives, hydrazine, and aluminum chloride. These molecular architectures (ALPHY) show multi-color (cyan, yellow, and orange) photoluminescence in solution and in the solid-state, which depends on the substituents of the ligands. The photoluminescence quantum yields of helicates were up to 54 %. The right-handed (P) and left-handed (M) helicates are so stable that they do not undergo racemization in some solvents and are mirror images according to circular dichroism and circularly polarized luminescence (CPL) with an absolute luminescence dissymmetry factor (g ) of up to the 10 order. Mixing the different helicates produces white-light emission with CPL characters. This study offers a glimpse into the potential applications of chromophores with diverse photophysical properties.
本文描述了由四齿配体与铝（III）离子组成的新型手性光发色团——双核三链螺旋配合物。它们通过两步反应合成，使用的是廉价的吡咯衍生物、肼和氯化铝。这些分子结构（ALPHY）在溶液和固态中均呈现多色（青色、黄色和橙色）光致发光，其发光颜色取决于配体的取代基。螺旋配合物的光致发光量子产率高达54%。右旋（P）和左旋（M）螺旋配合物非常稳定，在某些溶剂中不会发生外消旋化，并且根据圆二色性和圆偏振发光（CPL），它们是镜像关系，其绝对发光不对称因子（g）高达10的量级。将不同的螺旋配合物混合可产生具有CPL特性的白光发射。本研究展示了具有多样光物理性质的发色团的潜在应用前景。
