Control of Multicolor and White Emission by Adjusting the Equilibrium between Fluorophores, Lewis Acids, and Their Complexes in Polymers

Mori, Toshiaki; Yoshigoe, Yusuke; Kuninobu, Yoichiro

doi:10.1002/ange.201903408

Cited by 12 publications

(1 citation statement)

References 84 publications

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“…Therefore, exploring the doping and blending mechanisms is significant for understanding the fundamental physical principles of organic optoelectronic materials. However, although a number of interesting phenomenon and applications about the non-metallic coordination blending have been reported previously, the internal mechanism remains to be further studied 18,21,23,[34][35][36][37] .…”

Section: Introductionmentioning

confidence: 99%

Photoexcitation dynamics and energy engineering in supramolecular doping of organic conjugated molecules

Wei

Bai

et al. 2023

Light Sci Appl

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Doping and blending strategies are crucial means to precisely control the excited states and energy level in conjugated molecular systems. However, effective models and platforms are rarely proposed to systematically explore the effects of the formation of trapped doped centers on heterogeneous structures, energy level and ultrafast photophysical process. Herein, for deeply understanding the impact of molecular doping in film energy levels and photoexcitation dynamics, we set a supramolecular N-B coordination composed by the conjugated molecules of pyridine functionalized diarylfluorene (host material), named as ODPF-Phpy and ODPF-(Phpy)2, and the molecule of tris(perfluorophenyl)borane (BCF) (guest material). The generation of the molecular-level coordination bond increased the binding energy of N atoms and tuned the band-gap, leading to a new fluorescent emission center with longer excitation wavelength and emission wavelength. The intermolecular Förster resonance energy transfer (FRET) in blending films make it present inconsistent fluorescent behaviors compared to that in solution. The charge transfer (CT) state of N-B coordinated compounds and the changed dielectric constant of blending films resulted in a large PL spectra red-shift with the increased dopant ratio, causing a wide-tunable fluorescent color. The excited state behaviors of two compounds in blending system was further investigated by the transient absorption (TA) spectroscopy. Finally, we found supramolecular coordination blending can effectively improve the films’ photoluminescence quantum yield (PLQY) and conductivity. We believe this exploration in the internal coordination mechanisms would deepen the insights about doped semiconductors and is helpful in developing novel high-efficient fluorescent systems.

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Section: Introductionmentioning

confidence: 99%

Photoexcitation dynamics and energy engineering in supramolecular doping of organic conjugated molecules

Wei

Bai

et al. 2023

Light Sci Appl

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Core–Shell Fluorescent Polymeric Particles with Tunable White Light Emission Based on Aggregation Microenvironment Manipulation

Wang

Yang

et al. 2021

Angewandte Chemie

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White‐light emitting polymers (WLEPs) based on aggregation microenvironment‐sensitive aggregation‐induced emission (AIE) and Förster resonance energy transfer (FRET) have aroused great interest in lighting and optoelectronic devices. Herein, we developed a novel strategy to construct WLEP particles via a stepwise self‐stabilized precipitation polymerization of two emission‐complementary AIEgens under core–shell engineering, where the AIE characteristics and FRET process of core–shell fluorescent polymeric particles (CS‐FPPs) could be modulated by altering aggregation microenvironment under swelling and shrinking of polymers, facilitating the tunable white light emission of CS‐FPPs. Furthermore, such tuning could be fast realized in the solid state, thus demonstrating the potential in anti‐counterfeiting. This work proved the significance of aggregation microenvironment on emission of luminogens, guiding the development of high‐efficiency emission‐tunable materials.

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Density‐Dependent Emission Colors from a Conformation‐Switching Chromophore in Polyurethanes

Wang

Yan

et al. 2021

Angewandte Chemie

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Achievingf ull-color emission from as ingle chromophore is not only highly desirable from practical considerations,but also greatly challenging for fundamental research. Herein, we demonstrated the density-dependent emission colors from as ingle boron-containing chromophore,f rom which multi-color fluorescent polyurethanes were prepared as well. Originating from its switchable molecular conformations, the emission color of the chromophore was found to be governed by the packing density and strongly influenced by hydrogen bonding interactions.T he chromophore was incorporated into polyurethanes to achievef ull-color emitting materials;t he emission color was only dependent on the chromophore density and could be tuned via synthetic approach by controlling the compositions.The emission colors could also be modulated by physical approaches,including by swelling/deswelling process,compression under high pressure, and even blending the fluorescent polyurethane with nonemitting ones.

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Control of Multicolor and White Emission by Adjusting the Equilibrium between Fluorophores, Lewis Acids, and Their Complexes in Polymers

Cited by 12 publications

References 84 publications

Photoexcitation dynamics and energy engineering in supramolecular doping of organic conjugated molecules

Photoexcitation dynamics and energy engineering in supramolecular doping of organic conjugated molecules

Core–Shell Fluorescent Polymeric Particles with Tunable White Light Emission Based on Aggregation Microenvironment Manipulation

Density‐Dependent Emission Colors from a Conformation‐Switching Chromophore in Polyurethanes

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