Tunable‐Emission Amorphous Room‐Temperature Phosphorescent Polymers Based on Thermoreversible Dynamic Covalent Bonds

Lin, Xiaohan; Wang, Jie; Ding, Bingbing; Ma, Xiang; Tian, He

doi:10.1002/anie.202012298

Cited by 124 publications

(99 citation statements)

References 53 publications

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“…Recently, through a reversible D‐A reaction as illustrated in Scheme 2, three copolymers (Poly‐Br‐An, Poly‐Br‐An‐Cp, Poly‐Br‐An‐MA) fabricated by anthradiimide derivatives with acrylamide could produce RTP emission [ 40 ] . Moreover, Poly‐Br‐An even reached a high phosphorescence quantum yield of 12%.…”

Section: Heavy Atom–containing Rtp Polymersmentioning

confidence: 99%

Recent progress on pure organic room temperature phosphorescent polymers

2021

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So far, pure organic room temperature phosphorescence (RTP) materials are developing rapidly and have become a research hotspot in the scientific community. They are regarded as valuable resources with great potential for development in many fields, such as biomedicine, information multi‐level encryption, smart anti‐counterfeiting, and so on. Among them, a series of pure organic RTP polymer systems emerged at the right moment based on the excellent properties of polymers such as easy processing, low cost, and good biocompatibility. Furthermore, the huge molecular weight, long‐chain intertwined structure, and potential interactions with phosphors of polymers make them a focus for RTP emission. Herein, we describe the development history of this system in detail, explore the necessary factors for highly efficient emission from the phosphorescence emission process, and based on the dual effects of enhancing phosphorescence emission and shortening luminescence lifetime brought by heavy atoms, we summarize the internal mechanism and achievements of various researches from the perspective of heavy atom–containing and non‐heavy atom systems.

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Section: Heavy Atom–containing Rtp Polymersmentioning

confidence: 99%

Recent progress on pure organic room temperature phosphorescent polymers

2021

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“…Accordingly, it is rather significant to develop a kind of processability‐friendly pure organic RTP materials. Inspired by the copolymers of acrylamide (AM) and bromonaphthalimide (BrNpA) reported by Ma and co‐workers, [ 37–39 ] we envision that a type of liquid crystalline (LC) copolymer of BrNpA as the phosphor and cholesterol (Chol) as the LC mesogen, which is expected to take advantage of its liquid crystallinity to maintain the crystal property for efficient RTP and the flexibility for favorable processability. By virtue of harnessing this strategy, our copolymer bestows the following extraordinary features: i) decent thermal processability in the LC state, ii) 7.5‐fold enhancement of phosphorescent QY after thermal annealing, iii) free of phase separation.…”

Section: Methodsmentioning

confidence: 99%

Employing Cholesterol Copolymerization Strategy for a Thermally Processable Organic Room‐Temperature Phosphorescence Material

Zhao³

et al. 2021

Advanced Optical Materials

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Development of pure organic room‐temperature phosphorescent (RTP) materials with strong emission and decent processability is highly desirable. However, in the pursuit of high quantum yield (QY) of phosphorescence, the processability of RTP materials is suppressed unwarily. Here, a liquid crystalline (LC) copolymer is envisioned, NpA‐Chol, comprising bromonaphthalimide as the phosphor and cholesterol as the LC mesogen. NpA‐Chol exhibits LC flexibility at high temperatures, thus enabling the material to possess decent processability. In addition, the liquid crystallinity of NpA‐Chol could be improved remarkably after thermal annealing, making a 7.5‐fold increase in phosphorescence QY. This cholesterol copolymerization strategy paves a general avenue for addressing the major defect well: highly efficient RTP materials always suffer from suppression of thermal processability.

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“…The nondoped copolymer systems not only have robust capacity of facilitating nonradiative relaxation for RTP enhancement as a consequence of the stiffness provided by both polymer matrices and non‐covalent interactions (particularly hydrogen bonds in polymers), but also avoid the problems of phase separation between phosphors and polymers. [ 15,49,50 ]…”

Section: Nondoped Polymer Systems With Rtp Emissionmentioning

confidence: 99%

Recent Advances of Polymer‐Based Pure Organic Room Temperature Phosphorescent Materials

Wang

Lou

Wang

et al. 2021

Macromol. Rapid Commun.

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Room temperature phosphorescence (RTP) has attracted broad attention due to their long lifetimes, large Stokes shift, and widespread applications. Achieving RTP emission has long been a challenging task under common conditions, for the necessary requirements of promoting intersystem crossing processes and suppressing nonradiative transitions are always tough to meet. Over the past decade, RTP has been obtained through several specific strategies, among which an important method lies in immobilizing phosphors into polymer matrices. Via the effect of steric overcrowding exerted by the polymeric structures, the phosphorescence of the initial phosphors can be promoted significantly. Hence, polymer‐based pure organic materials have proved to be one newly emerging subject in the field of RTP materials. In this review article, the progresses of polymer‐based pure organic room temperature phosphorescent materials are elaborated from four main approaches, including doped polymer systems, copolymer systems, homopolymer systems, and host–guest complexation systems, whereby the design principles, synthesis methods, possible mechanisms, and applications are summarized and discussed in detail.

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Tunable‐Emission Amorphous Room‐Temperature Phosphorescent Polymers Based on Thermoreversible Dynamic Covalent Bonds

Cited by 124 publications

References 53 publications

Recent progress on pure organic room temperature phosphorescent polymers

Recent progress on pure organic room temperature phosphorescent polymers

Employing Cholesterol Copolymerization Strategy for a Thermally Processable Organic Room‐Temperature Phosphorescence Material

Recent Advances of Polymer‐Based Pure Organic Room Temperature Phosphorescent Materials

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