TY - JOUR
T1 - Dinuclear Triple-Stranded Helicates Composed of Tetradentate Ligands with Aluminum(III) Chromophores
T2 - Optical Resolution and Multi-color Circularly Polarized Luminescence Properties
AU - Ono, Toshikazu
AU - Ishihama, Kohei
AU - Taema, Ai
AU - Harada, Takunori
AU - Furusho, Kiyonao
AU - Hasegawa, Masashi
AU - Nojima, Yuki
AU - Abe, Masaaki
AU - Hisaeda, Yoshio
N1 - Funding Information:
This work was supported JSPS KAKENHI Grant Numbers JP17H04875, JP16H06514, JP20H04675, and JP20K21212. We thank the support from Toyota Riken Scholar Program, and Kyushu University's QR Program. We thank Prof. T. Okawara for discussion.
Publisher Copyright:
© 2020 Wiley-VCH GmbH
PY - 2021/2/1
Y1 - 2021/2/1
N2 - 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 (glum) of up to the 10−3 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.
AB - 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 (glum) of up to the 10−3 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.
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U2 - 10.1002/anie.202011450
DO - 10.1002/anie.202011450
M3 - Article
C2 - 33064346
AN - SCOPUS:85096939106
SN - 1433-7851
VL - 60
SP - 2614
EP - 2618
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 5
ER -