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Heteroleptic [Bis(oxazoline)](dipyrrinato)zinc(II) Complexes: Bright and Circularly Polarized Luminescence from an Originally Achiral Dipyrrinato Ligand
Author(s) -
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
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201509411
Subject(s) - luminescence , ligand (biochemistry) , moiety , oxazoline , chirality (physics) , fluorescence , intramolecular force , axial chirality , chemistry , stacking , crystallography , zinc , photochemistry , stereochemistry , materials science , enantioselective synthesis , optics , receptor , organic chemistry , optoelectronics , physics , catalysis , biochemistry , nambu–jona lasinio model , chiral symmetry breaking , quantum mechanics , quark
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 1 π–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.