Intermolecular electronic coupling of 9-methyl-9H-dibenzo[a,[c] carbazole for strong emission in aggregated state by substituent effect

Liu, Fan; Liao, Qiuyan; Wang, Jinfeng; Gong, Yanbing; Dang, Qianxi; Ling, Weidong; Han, Mengmeng; Li, Qianqian; Li, Zhen

doi:10.1007/s11426-020-9814-7

Cited by 39 publications

(23 citation statements)

References 49 publications

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“…Considering the molecular structure, the change of molecular conformation opens up a new ave-nue for exploring possible adjustment of molecular packing in aggregates. The obtained results further demonstrate the importance of molecular packing in aggregated state, and show the concept of MUSIC [65][66][67][68][69][70].…”

Section: Discussionsupporting

confidence: 66%

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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Section: Discussionsupporting

confidence: 66%

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

Xie

et al. 2021

Sci. China Mater.

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“…It should be noted, that De Cola, Hogan, Aliprandi and co‐workers discovered 20 times ECL enhancements of square planar Pt(II) complexes comparing solution to solid ECL in late 2017 and to the best of our knowledge, was the first to assign AIECL [36] . More recent AIECL work by various authors can be found in the following references [37–41] …”

Section: Electrochemiluminescence Of Filmsmentioning

confidence: 91%

“…[36] More recent AIECL work by various authors can be found in the following references. [37][38][39][40][41]…”

Section: Aiecl Of Carboranyl Carbazole Derivative Filmsmentioning

confidence: 99%

Film Electrochemiluminescence Controlled by Interfacial Reactions Along with Aggregation‐, Matrix‐Coordination‐, and Crystallization‐Induced Emissions

Adsetts

Ding

2021

ChemPlusChem

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ECL enhancements of nanoparticle films and an in-depth analysis of the application of this knowledge into development of optoelectronics follow. Finally, recent novel crystallization induced ECL enhancements and hypochromic shifts are provided. Future analyses of these film ECL enhancement phenomena will provide complementary information for the optimal implementation of next generation luminophores into thin film optoelectronic and sensing applications.

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“…Wherein, red light is not only an indispensable part of three primary colors for full‐color displays and white OLED but also widely applied in the field of optical telecommunication, information secured devices, night‐vision displays, and bioimaging 17–24 . Although there are rapid advances in organic light‐emitting materials with various colors through rational molecular design, 25–40 the development of red and near‐infrared (NIR) materials is much slower due to the intrinsic narrow bandgap and aggregation‐caused quenching (ACQ) effect 41–43 …”

Section: Introductionmentioning

confidence: 99%

“…In 2001, Luo et al 53 coined the concept of aggregation‐induced emission (AIE) which revealed that some fluorophores with twist conformation emit dimly in solution but become strongly emissive upon forming aggregates. Since then, a large amount of experimental and theoretical research works were carried out to extend the scopes of AIE and explore the intrinsic mechanisms 40,54–58 . Currently, the widely accepted AIE mechanism is the restriction of intramolecular motions, 40,59,60 including restriction of intramolecular rotation, and restriction of intramolecular vibration.…”

Section: Introductionmentioning

confidence: 99%

Aggregation‐induced emission: Red and near‐infrared organic light‐emitting diodes

Xie

et al. 2021

SmartMat

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116

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Red and near‐infrared (NIR) organic light‐emitting diodes (OLED) have gained remarkable interest due to their numerous applications. However, the construction of highly emissive emitters is hampered by the energy‐gap law and aggregation‐caused quenching (ACQ) effect. Whereas, aggregation‐induced emission (AIE) materials could avoid the undesirable ACQ effect and emit bright light in aggregated state, which is one class of the most promising materials to fabricate high‐performance OLED with a high external quantum efficiency and low efficiency roll‐off. This review summarizes recent advances in red and NIR OLED with AIE property, including the traditional fluorescence, thermally activated delayed fluorescence, and hybridized local and charge transfer compounds. Meanwhile, the emphasis attention is paid to the molecular design principles, as well as the molecular structure‐photophysical characteristics. We also briefly further outlook the challenges and perspective of red and NIR AIE luminogens.

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Intermolecular electronic coupling of 9-methyl-9H-dibenzo[a,[c] carbazole for strong emission in aggregated state by substituent effect

Cited by 39 publications

References 49 publications

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

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

Film Electrochemiluminescence Controlled by Interfacial Reactions Along with Aggregation‐, Matrix‐Coordination‐, and Crystallization‐Induced Emissions

Aggregation‐induced emission: Red and near‐infrared organic light‐emitting diodes

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