Tunable AICPL of (S)‐Binaphthyl‐Based Three‐Component Polymers via FRET Mechanism

Abstract

Five three-component chiral polymers incorporating (S)-1,1'-binaphthyl, tetraphenylethene (TPE) and fluorene moieties are designed and synthesized by Pd-catalyzed Sonogashira reaction. All these polymers show obvious aggregation induced emission enhancement response behavior in the fluorescence emission region of 460-480 nm. Interestingly, three of them show aggregation-induced circularly polarized luminescence (AICPL) signals in tetrahydrofuran-H O mixtures. Most importantly, these AICPL signals can be tuned by changing the molar ratios of TPE and fluorene components through fluorescence resonance energy transfer and give the highest glum = ±4.0 × 10 . This work provides a novel strategy for developing AICPL-enhanced materials.

Practical Enantioselective Synthesis of Chiroptical Polymers of Intrinsic Microporosity with Circular Polarized Luminescence

“…Materials exhibiting CPL emission have attracted tremendous interest owing to their extensive optical information and wide range of applications, which have been comprehensively reviewed recently by Di Bari’s group and others, ,, among which polymers could be especially useful as they generally offer the potential to amplify chiroptical properties. , Particularly, the polymers with strong polarized luminescence and good capacity to prepare thin films for optoelectronic devices by facile solution processes have been a promising field of research. ,− (−)-CCS-PIM constructed with chiral spirobiindane units and the luminescent chromophore of 1,4-phenylenedicyanide, as well as the asymmetric helical 3D conformation endow it with a capability to achieve CPL emission. What should be noticed is that the intrinsic inefficient packing of the polymer chains may prevent the aggregation-induced FL quenching by spatial isolation, an issue faced by most organic luminophores in the solid state …”

Recent Progress on Circularly Polarized Luminescent Materials for Organic Optoelectronic Devices

“…In addition to direct modification of conjugated polymers with a chiral moiety, chiral luminophore can also be designed by the use of chiral dopants in achiral polymers . For example, Fuchter and co‐workers first blended enantiomer of helicene 178 into the achiral polymer 177 with different doped ratios in film .…”

Modulation of Aggregation‐Caused Quenching to Aggregation‐Induced Emission: Finding a Biocompatible Polymeric Theranostics Platform for Cancer Therapy

“…The first FRET from fluorine moiety to TPE moiety has been reported by our previous study. [10] To demonstrate the second FRET process from TPE moiety to DTBT moiety, the UV-vis absorbance spectrum of P-1 has been measured and carried out in Figure 1E-a. As shown, P-1 gave a strong absorbance peak around 366 nm, which could be assigned to the conjugated backbone.…”