Chiral exciplex dyes showing circularly polarized luminescence: Extension of the excimer chirality rule
TLDR
This systematic study allowed us to confirm that the excimer chirality rule can be applied to the exciplex dyes: left- and right-handed exciplexes with a twist angle of less than 90° exhibit (−)- and (+)-CPL, respectively.Abstract:
A series of axially chiral binaphthyls and quaternaphthyls possessing two kinds of aromatic fluorophores, such as pyrenyl, perylenyl, and 4-(dimethylamino)phenyl groups, arranged alternately were synthesized by a divergent method. In the excited state, the fluorophores selectively formed a unidirectionally twisted exciplex (excited heterodimer) by a cumulative steric effect and exhibited circularly polarized luminescence (CPL). They are the first examples of a monomolecular exciplex CPL dye. This versatile method for producing exciplex CPL dyes also improved fluorescence intensity, and the CPL properties were not very sensitive to the solvent or to the temperature owing to the conformationally rigid exciplex. This systematic study allowed us to confirm that the excimer chirality rule can be applied to the exciplex dyes: left- and right-handed exciplexes with a twist angle of less than 90 degrees exhibit (-)- and (+)-CPL, respectively.read more
Citations
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Chiral Arylene Diimide Phosphors: Circularly Polarized Ambient Phosphorescence from Bischromophoric Pyromellitic Diimides.
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Multistate Circularly Polarized Luminescence Switching through Stimuli-induced Co-conformation Regulations of Pyrene-functionalized Topologically Chiral [2]Catenane.
Yu Jue Wang,Jiacheng Gong,Xianwei Wang,Wei-Jian Li,Xueqing Wang,Xiao He,Wei Wang,Hai-Bo Yang +7 more
TL;DR: In this article , topologically chirality-based CPL switches with multiple switchable emission states and high dissymmetry factors (glum) were employed as the key platform to construct a novel multistate CPL switching system.
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Tunable Excimer Circularly Polarized Luminescence in Isohexide Derivatives from Renewable Resources
TL;DR: The synthesis and chiroptical properties of pyrene and perylene derivatives of inexpensive chiral scaffolds: isomannide and isosorbide are shown and an oppositely signed excimer band with respect to the homo-substituted derivatives is shown.
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Ruthenium Complexes Bearing Axially Chiral Bipyridyls: The Mismatched Diastereomer Showed Red Circularly Polarized Phosphorescence.
TL;DR: In this article , a new family of chiral complex dyes was synthesized for rutheniumII complexes bearing three axially chiral bipyridyl ligands.
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Cyclic arrays of five pyrenes on one rim of a planar chiral pillar[5]arene
TL;DR: In this paper , five pyrene planes were attached to a chiral macrocycle, pillar[5]arene, producing a set of chiroptical molecules in which pyrene-derived absorption and emission were endowed with dissymmetry by effective transfer of chiral information.
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