Heteroleptic [Bis(oxazoline)](dipyrrinato)zinc(II) Complexes: Bright and Circularly Polarized Luminescence from an Originally Achiral Dipyrrinato Ligand

Heteroleptic zinc(II) complexes synthesized using achiral dipyrrinato and chiral bis(oxazoline) ligands show bright fluorescence with quantum efficiencies of up to 0.70. The fluorescence originates from the 1π–π* photoexcited state localized exclusively on the dipyrrinato ligand. Furthermore, the lu...

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Bibliographic Details
Published in:Angewandte Chemie 2016-01, Vol.128 (4), p.1399-1403
Main Authors: Kögel, Julius F., Kusaka, Shinpei, Sakamoto, Ryota, Iwashima, Toshiki, Tsuchiya, Mizuho, Toyoda, Ryojun, Matsuoka, Ryota, Tsukamoto, Takamasa, Yuasa, Junpei, Kitagawa, Yasutaka, Kawai, Tsuyoshi, Nishihara, Hiroshi
Format: Article
Language:English
Subjects:
Absorption
Brightening
Chemistry
Chirality
Chiralität
Circularity
Coordination compounds
Crystal structure
Fluorescence
Fluoreszenz
Ligands
Luminescence
N-Liganden
Single crystals
Stacking
Structural analysis
X-rays
Zinc
Zinc compounds
Zink
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Summary:Heteroleptic zinc(II) complexes synthesized using achiral dipyrrinato and chiral bis(oxazoline) ligands show bright fluorescence with quantum efficiencies of up to 0.70. The fluorescence originates from the 1π–π* photoexcited state localized exclusively on the dipyrrinato ligand. Furthermore, the luminescence is circularly polarized despite the achirality of the dipyrrinato ligand. Single‐crystal X‐ray structure analysis discloses that the chiral bis(oxazoline) ligand undergoes intramolecular π–π stacking with the dipyrrinato ligand, inducing axial chirality in the dipyrrinato moiety. Indirekter Einfluss: Heteroleptische Zink(II)‐Komplexe mit achiralen Dipyrrinato‐ (magenta) und chiralen Bis(oxazolin)‐Liganden (türkis) zeigen eine starke Fluoreszenz der Dipyrrinato‐Einheit mit Quantenausbeuten bis zu 0.70. Der Bis(oxazolin)‐Ligand induziert axiale Chiralität am Dipyrrinato‐Liganden, sodass das emittierte Licht zirkulare Polarisation aufweist.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201509411