A processable, scalable, and stable full-color ultralong afterglow system based on heteroatom-free hydrocarbon doped polymers

Zheng, Xiaojiao; Han, Qi; Lin, Qinglian; Li, Cuicui; Jiang, Jun; Guo, Qing; Ye, Xin; Yuan, Wang Zhang; Liu, Yang; Tao, Xutang

doi:10.1039/d2mh00998f

Cited by 52 publications

(40 citation statements)

References 94 publications

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“…Ultralong organic room-temperature phosphorescence (UORTP) has been attracting considerable attention − in past years due to its superiorities of low toxicity and flexible structural modification − and its wide applications in bioimaging/sensing, − encryption/anticounterfeiting, , organic light-emitting diodes, − etc. 1 H -Benzo[ f ]indole (Bd), a type of carbazole isomer, has been recognized as an important building block for UORTP materials − since Prof. Bin Liu refined it from commercial carbazole.…”

Section: Introductionmentioning

confidence: 99%

Achieving Colorful Ultralong Organic Room-Temperature Phosphorescence by Precise Modification of Nitrogen Atoms on Phosphorescence Units

Jin,

Zhang,

et al. 2023

ACS Appl. Mater. Interfaces

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We successfully tune ultralong organic room-temperature phosphorescence (UORTP) by a simple strategy of precisely modifying nitrogen atoms on Phosphorescence Units, and colorful ultralong phosphorescence can be achieved. We for the first time investigate the structure–function relationship between phosphorescence properties and molecular structures of Phosphorescence Units. With BCz and BCz-1 as comparison, eight new Phosphorescence Units were synthesized by introducing one or two nitrogen atoms to the naphthalene moiety. For all the 10 Phosphorescence Units, their room-temperature ultralong phosphorescence in the PMMA film should be assigned to monomer phosphorescence from intrinsic T1 decay. For Phosphorescence Units series I (BCz, NBCz-1, NBCz-2, NBCz-3, NBCz-4, NBCz-5, and NBCz-6), introducing one nitrogen atom to the naphthalene moiety can significantly affect the phosphorescence properties of Phosphorescence Units, and the effect is quite complicated. For modification on the inner ring, the T1 energy level of NBCz-1 decreases, and the red shift of UORTP occurs while the T1 energy level of NBCz-2 increases and the blue shift of UORTP happens. For modification on the outer ring, no phosphorescence color change is observed for NBCz-3 and NBCz-4, but their phosphorescence lifetimes vary notably due to different intersystem crossing efficiencies; as the modification site approaches the central five-member ring, the T1 energy levels of NBCz-5 and NBCz-6 decrease, and their UORTP red shifts dramatically. For Phosphorescence Units series II (BCz, 2NBCz, BCz-1, and 2NBCz-1), introducing two nitrogen atoms to the outer six-member ring reduces energy level of T1 excitons and leads to incredible red shift of UORTP for BCz and 2NBCz while surprisingly energy levels of T1 excitons rise and UORTP blue shifts for BCz-1 and 2NBCz-1. Under the condition of proper modification sites, it is true that the more the additional nitrogen atoms, the more red-shifted the ultralong phosphorescence. This study may expand our knowledge of organic phosphorescence and lay the foundation for its future applications.

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Section: Introductionmentioning

confidence: 99%

Achieving Colorful Ultralong Organic Room-Temperature Phosphorescence by Precise Modification of Nitrogen Atoms on Phosphorescence Units

Jin,

Zhang,

et al. 2023

ACS Appl. Mater. Interfaces

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“…On account of the excellent mechanical flexibility and large-area producibility, this polymer-related phosphorescent system had a bright opportunity for the construction of complex 3D objects with afterglow, curling, and repeatable folding properties (Figure c, inset). More interestingly, Zheng et al recently confirmed that pure polycyclic aromatic hydrocarbons may outperform phosphorescent chromophores containing heteroatoms or heavy atoms (Figure d). With the increasing conjugation extent of chromophores, full-color (blue, green and orange) phosphorescence can be measured in polymeric systems.…”

Section: Synthesis Strategies Of Room-temperature Phosphorescence In ...mentioning

confidence: 89%

Section: Synthesis Strategies Of Room-temperature Phosphorescence In ...mentioning

confidence: 99%

Molecularly Engineered Room-Temperature Phosphorescence for Biomedical Application: From the Visible toward Second Near-Infrared Window

Chang,

Chen,

Bao

et al. 2023

Chem. Rev.

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“…In previous studies, coronene was incorporated into host materials with high oxygen barrier properties, such as β ‐estradiol [11] and poly(methyl methacrylate), [12] and the organic RTP materials with long phosphorescence lifetimes of 17 s (deuterated coronene) [8] and 6 s [9] in air, respectively, were reported. However, in these host materials (organic small molecules [6,8,13] and polymers [6–7,9,14] ), the aggregation of guest molecules, [15] low solubility of guest molecules to host materials during incorporation, [7a] and aggregation of guest molecules over time [7b] remain problematic.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Coronene into Cage‐like Porous Organic Salts and Induction of its Room‐Temperature Phosphorescence in Air

2023

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Coronene emits phosphorescence only at cryogenic temperatures in the absence of oxygen. To achieve room‐temperature phosphorescence (RTP), coronene has been incorporated into various host materials to prevent non‐radiative deactivation of the incorporated molecules. Among host materials, crystalline porous materials homogeneously incorporate luminescent molecules and prevent their aggregation. Therefore, they have attracted attention as potential host materials. Although coronene incorporated into a crystalline porous material exhibited RTP in previous studies, the host material exhibited high affinity for oxygen, allowing the expression of RTP only under anoxic conditions. Therefore, RTP has not been achieved in air. Herein, we incorporate coronene into cage‐like sodalite‐type porous organic salts (s‐POSs) composed of tetrasulfonic acid with an adamantane core (4,4’,4’’,4’’’‐[adamantane‐1,3,5,7‐tetrayl]tetrabenzenesulfonic acid; AdPS) and triphenylmethylamines modified with substituents at the para‐position of the benzene rings (TPMA−X, X=methyl [Me], Br, I), which have low oxygen affinities and different degrees of heavy‐atom effects on incorporated coronene. The combination of the oxygen barrier due to the low affinity of s‐POSs for oxygen and the external heavy‐atom effect of bromine and iodine exposed on the pore surface enabled the incorporated coronene to exhibit RTP in air (phosphorescence lifetime with more than microseconds).

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A processable, scalable, and stable full-color ultralong afterglow system based on heteroatom-free hydrocarbon doped polymers

Abstract: Although the room-temperature phosphorescence (RTP) organic material is a long-studied topic and has become especially popular in the recent decade, all-round players with qualified long-lived RTP lifetimes to fulfill the...

Cited by 52 publications

References 94 publications

Achieving Colorful Ultralong Organic Room-Temperature Phosphorescence by Precise Modification of Nitrogen Atoms on Phosphorescence Units

Achieving Colorful Ultralong Organic Room-Temperature Phosphorescence by Precise Modification of Nitrogen Atoms on Phosphorescence Units

Molecularly Engineered Room-Temperature Phosphorescence for Biomedical Application: From the Visible toward Second Near-Infrared Window

Incorporation of Coronene into Cage‐like Porous Organic Salts and Induction of its Room‐Temperature Phosphorescence in Air

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