Host–guest materials with room temperature phosphorescence: Tunable emission color and thermal printing patterns

Wang, Yunsheng; Yang, Jie; Gong, Yanxiang; Fang, Manman; Li, Zhen; Tang, Ben Zhong

doi:10.1002/smm2.1006

Cited by 119 publications

(123 citation statements)

References 57 publications

(164 reference statements)

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“…Further on, it is found that the newly formed absorption peak can be totally identical to the RTP excitation spectrum of M–CH 3 (Figure 4B), indicating the formation of triplet exciplex (Figure S27, Supporting Information). [ 33–40 ] This should be the main reason for the boosted RTP performance in doping systems, as triplet exciplex has been reported to be able to enhance the radiative transition of phosphorescence in previous literatures. [ 33 ] Besides, the HOMO/LUMO energy levels of CS–CH 3 and CzS–CH 3 are calculated (Figures S28 and S29, Supporting Information).…”

Section: Figurementioning

confidence: 99%

High Performance of Simple Organic Phosphorescence Host–Guest Materials and their Application in Time‐Resolved Bioimaging

et al. 2021

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The study of purely organic room‐temperature phosphorescence (RTP) has drawn increasing attention because of its considerable theoretical research and practical application value. Currently, organic RTP materials with both high efficiency (ΦP > 20%) and a long lifetime (τP > 10 s) in air are still scarce due to the lack of related design guidance. Here, a new strategy to increase the phosphorescence performance of organic materials by integrating the RTP host and RTP guest in one doping system to form a triplet exciplex, is reported. With these materials, the high‐contrast labeling of tumors in living mice and encrypted patterns in thermal printing are both successfully realized by taking advantage of both the long afterglow time (up to 25 min in aqueous media) and high phosphorescence efficiency (43%).

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Section: Figurementioning

confidence: 99%

High Performance of Simple Organic Phosphorescence Host–Guest Materials and their Application in Time‐Resolved Bioimaging

et al. 2021

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“…Besides crystal engineering, the development of host–guest doping system was also an efficient way to realize ultralong RTP emission. [ 47–51 ] In 2017, Kabe and Adachi successfully realized a long persistent luminescence more than 1 h in a host–guest doping system, which could be even comparable to the most outstanding inorganic phosphors (Figure 7A). [ 47 ] In their system, the host material of PPT acted as electron donor and guest of TMB as electron acceptor.…”

Section: Organic Luminescent Behaviors In Solid Statementioning

confidence: 99%

Organic luminescent materials: The concentration on aggregates from aggregation‐induced emission

2020

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The research of organic luminescent materials in aggregate has drawn more and more attention for their wide applications. To adjust the luminescent properties for aggregates, a deep understanding of the corresponding internal mechanism is needed. In this short review, a brief introduction of aggregation‐induced emission (AIE) and some other solid state luminescence behaviors derived from or parallel to AIE is presented. Particularly, the relationship between emission property and intermolecular/intramolecular interactions is summarized, with the aim to guide the further development of organic optoelectronic materials in aggregate.

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“…Purely organic luminescent materials have been widely investigated due to their potential applications in optoelectronic devices, biological imaging and information encryption [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Although the emissive behaviors are closely related to the electronic nature of the molecular structure, the molecular packing mode also affects the property to a large extent.…”

Section: Introductionmentioning

confidence: 99%

Different molecular conformation and packing determining mechanochromism and room-temperature phosphorescence

Xie

et al. 2021

Sci. China Mater.

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The phenomenon that different molecular packing modes in aggregates result in different optical properties has attracted intense attention, since it can provide useful information to establish the relationship between the micro-and macro-world. In this paper, DBTDO-DMAC was designed with 9,10-dihydro-9,9-dimethylacridine (DMAC) as electron donor. DBTDO-DPA and DBTDO-Cz were designed for comparison, which adopted diphenylamine (DPA) with twisted structure and carbazole (Cz) with planar structure as donors, respectively. As expected, two polymorphs (Crystal G and Crystal Y) of DBTDO-DMAC were obtained and exhibited distinct properties. Crystal G originating from planar conformation exhibited mechanochromism (MC) phenomenon and the emission color changed from green to yellow with a redshift of 35 nm after grinding. Nevertheless, Crystal Y with folded conformation displayed obvious room-temperature phosphorescence (RTP) with yellow afterglow. Careful single crystal analyses, powder X-ray diffraction and theoretical calculation reveal that the different emissive behaviors are highly related to the molecular conformation and packing modes. The successful adjustment of molecular conformation provides some guidance in the design of other MC and/or RTP luminogens, broadens the molecule family with the tunable molecular conformation and opens up a new avenue for exploring possible adjustment of molecular packing in aggregates.

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Host–guest materials with room temperature phosphorescence: Tunable emission color and thermal printing patterns

Cited by 119 publications

References 57 publications

High Performance of Simple Organic Phosphorescence Host–Guest Materials and their Application in Time‐Resolved Bioimaging

High Performance of Simple Organic Phosphorescence Host–Guest Materials and their Application in Time‐Resolved Bioimaging

Organic luminescent materials: The concentration on aggregates from aggregation‐induced emission

Different molecular conformation and packing determining mechanochromism and room-temperature phosphorescence

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