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/anie.201903408

Cited by 33 publications

(21 citation statements)

References 84 publications

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“…[113] Based on the literature, it has been noted that borane A (B(C6F5)3) can complex ketones and therefore can change their absorption or emission properties and then their photochemical reactivities. [226][227][228][229] Notably, without light activation, the cationic polymerization of p-methoxystyrene was reported in the presence of borane A and water. Owing to the complexation of borane A with water, acidity of the reaction media could be greatly improved, enabling the polymerization of pmethoxystyrene to occur.…”

Section: Pi λMax (Nm)mentioning

confidence: 99%

Recent advances on coumarin-based photoinitiators of polymerization

Dumur

2022

European Polymer Journal

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During the past decades, a breakthrough has been obtained in the development of photoinitiators activable under low light intensity and in the visible range. In the search for new structures, biosourced or bioinspired molecules have been examined as potential candidates for photoinitiation. In this field, coumarins that can be found in numerous flowers, fruits, vegetables and plant species were determined as highly efficient photoinitiators of polymerization. Especially, these structures were determined as acting as efficiency photoinitiators in Type I and Type II initiating systems. In this review, an overview of the recent development on visible light coumarin-based photoinitiators of polymerization is provided. To evidence the interest of these structures, comparisons with reference photoinitiating systems will be provided.

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Section: Pi λMax (Nm)mentioning

confidence: 99%

Recent advances on coumarin-based photoinitiators of polymerization

Dumur

2022

European Polymer Journal

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“…Additionally, the sample with a doping concentration of 7.0 wt% in polyvinyl acetate exhibited white emission, with CIE coordinates of (0.33, 0.32) and QY of 12%. [ 111 ] Vaidyanathan et al designed and synthesized six novel yellowish‐orange light‐emitting dye molecules consisting of an electron‐efficient phenone (acceptor) linked to triphenylamine (TPA, donor). The dyes emitted intense yellowish‐orange ( x = 0.427, y = 0.481) to orange color ( x = 0.511, y = 0.484) with appropriate CIE color coordinates.…”

Section: Recent Advances In Organic and Polymer Luminescent Materialsmentioning

confidence: 99%

Rare Earth‐Free Luminescent Materials for WLEDs: Recent Progress and Perspectives

Zhang

Pan

et al. 2020

Adv Materials Technologies

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The development and application of white light‐emitting diode (WLED) lighting technology are of great significance for reducing energy consumption. Commonly used WLED devices rely on the use of rare earth luminescent materials. However, rare earth elements are nonrenewable resources, and mining and refining processes have an adverse impact on the environment. In recent years, new white light‐emitting luminescent materials that do not contain rare earth elements have been developed, such as quantum dots, fluorescent carbon dots, perovskite luminescent materials, organic luminescent materials, and metal–organic framework materials, among others, some of which are successfully applied in the development of WLEDs. Herein the latest progress in this research field is reviewed, analyzing the construction of practical WLED devices and comparing the characteristics of newly developed rare earth‐free luminescent materials. Last, the future development prospects in this field are described.

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“…Although tremendous progress has been made, most current multicolor and white emission materials are concentrated on singlet ET (SET) between fluorescent chromophores. − However, the rapid release of energy from the donor molecules results in an instantaneous high energy density of singlet exciton because of its short lifetime. The receptor molecules have no time to harvest all the energy, leading to a great loss of energy .…”

Section: Introductionmentioning

confidence: 99%

Control of Multicolor and White Emission by Triplet Energy Transfer

Cui

Shi

2021

J. Phys. Chem. A

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A new strategy by manipulating the progress of triplet energy transfer (TET) is developed to realize adjustable multicolor and pure white emission. Donor phosphorescent molecules emits light when encapsulated into polyvinyl alcohol (PVA) through hydrogen bond interactions, and acceptor fluorescent molecules emits light when doped into PVA through cation-π interactions and hydrogen bond interactions. In addition, the triplet to singlet energy transfer process and mechanism are proved using the energy diagram and lifetime. The broadband emission color of the obtained composite film can be easily modulated by simply adjusting the amount and component of dyes, especially the white emission with CIE coordinates of (0.339, 0.337). This work provides a facile and versatile method for the development of multicolor and pure white-light-emitting diodes, which uses the interactions to light up luminescence properties, and can further aid in the wide development of applications for TET in various other fields.

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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 33 publications

References 84 publications

Recent advances on coumarin-based photoinitiators of polymerization

Recent advances on coumarin-based photoinitiators of polymerization

Rare Earth‐Free Luminescent Materials for WLEDs: Recent Progress and Perspectives

Control of Multicolor and White Emission by Triplet Energy Transfer

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