Journal ArticleDOI
Halogen Bonded Chiral Emitters: Generation of Chiral Fractal Architecture with Amplified Circularly Polarized Luminescence
Shuyuan Zheng,Shuyuan Zheng,Jianlei Han,Xue Jin,Qiang Ye,Jin Zhou,Pengfei Duan,Pengfei Duan,Minghua Liu +8 more
TLDR
In this article, two axially chiral emitters with halogen bond sites co-assemble with an achiral 1,4-diiodotetrafluorobenzene (F4 DIB) and well-ordered chiral fractal structures with asymmetry amplification.Abstract:
Self-assembled chiroptical materials have attracted considerable attention due to their great applications in wide fields. During the chiral self-assembly, it remains unknown how achiral molecules can affect the assembly process and their final chiroptical performance. Herein, we report an achiral molecule directed chiral self-assembly via halogen bonds, exhibiting not only an unprecedented chiral fractal architecture but also significantly amplified circularly polarized luminescence (CPL). Two axially chiral emitters with halogen bond sites co-assemble with an achiral 1,4-diiodotetrafluorobenzene (F4 DIB) and well-ordered chiral fractal structures with asymmetry amplification are obtained. The enhancement of the dissymmetry factors of the assemblies was up to 0.051 and 0.011, which was approximately 100 folds than those of the corresponding molecules. It was found that both the design of the chiral emitter and the highly directional halogen bond played an important role in hierarchically chirality transfer from chiral emitters to the micrometer scale chiral fractal morphology and amplified dissymmetry factors. We hope that this strategy can give a further insight into the fabrication of structurally unique featured highly efficient chiroptical materials.read more
Citations
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Journal ArticleDOI
Host‐guest Complexation‐induced Aggregation based on Pyrene‐modified Cyclodextrins for Improved Electronic Circular Dichroism and Circularly Polarized Luminescence
TL;DR: In this article , several γ-cyclodextrin derivatives mono- or di-substituted by pyrenes at the primary rim of CD were demonstrated to aggregate into nano-strips in aqueous solutions, with the pyrene moieties interpenetrating into g-CD cavities.
Journal ArticleDOI
Amplified Circularly Polarized Electroluminescence Behavior Triggered by Helical Nanofibers from Chiral Co-assembly Polymers.
TL;DR: In this article , two chiral binaphthyl polymers (R / S -P1 and R / S-P2 ) were chosen as chiral inducers to construct chiral co-assemblies with an achiral pyrene-naphthalimide dye (NPy ) and then acted as the emitting layer (EML) of CP-EL devices.
Journal ArticleDOI
Asymmetric Tris-Heteroleptic Cyclometalated Phosphorescent Iridium(III) Complexes: An Emerging Class of Metallophosphors
TL;DR: In this paper , the authors highlight the recent efforts on the asymmetric trisheteroleptic cyclometalated iridium(III) phosphors including the molecular design strategies, chemical synthesis, excited-state tuning, and structure-property relationships as well as their applications, especially in organic electroluminescence.
Journal ArticleDOI
ATP-Induced Emergent Circularly Polarized Luminescence and Encryption.
TL;DR: In this paper , an ATP-driven chiral assembly exhibiting circularly polarized luminescence (CPL) via the interaction of achiral terpyridine-based Zn(II) complex with nucleotides was reported.
References
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Journal ArticleDOI
Self-assembly at all scales.
TL;DR: Self-assembling processes are common throughout nature and technology and involve components from the molecular to the planetary scale and many different kinds of interactions.
Journal ArticleDOI
The Halogen Bond
Gabriella Cavallo,Pierangelo Metrangolo,Pierangelo Metrangolo,Roberto Milani,Tullio Pilati,Arri Priimagi,Giuseppe Resnati,Giancarlo Terraneo +7 more
TL;DR: The specific advantages brought up by a design based on the use of the halogen bond will be demonstrated in quite different fields spanning from material sciences to biomolecular recognition and drug design.
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Formation of fractal clusters and networks by irreversible diffusion-limited aggregation
TL;DR: A model for diffusion-controlled aggregation in which growing clusters as well as individual particles are mobile has been investigated in this article, and two versions of the model in which the cluster diffusion coefficient is either size independent or inversely proportional to number of particles (mass) give very similar results.
Journal ArticleDOI
Supramolecular Chirality in Self-Assembled Systems
Minghua Liu,Li Zhang,Tianyu Wang +2 more