Luminescent Thermoresponse via Excimer/Exciplex Transition of Pyrene Derivative in Polymer Networks Containing [3]Rotaxane

Nakagawa, Toshio; Ishino, Saqura; Inamori, Daiki; Masai, Hiroshi; Terao, Jun

doi:10.1021/acsmacrolett.3c00196

Cited by 6 publications

(1 citation statement)

References 51 publications

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“…[31][32][33] In addition, mechanical bond has shown unique advantages in stabilising the excimer of conjugated planar aromatic compounds. [34][35][36][37] Moreover, modification by mechanical bond can impart new optical properties to luminescent molecules, [38][39][40][41][42][43][44] due to its crowded chemical environment and flexible molecular structure. Inspired by these previous works, we investigate the application of mechanical bonds to optimise the fluorescence of pyrene.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Bond Induced Enhancement and Purification of Pyrene Emission in the Solid State

Zhang,

Zhou,

Zhang

et al. 2024

Chemistry A European J

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To address key concerns on solid‐state pyrene‐based luminescent materials, we propose a novel and efficient mechanical bond strategy. This strategy results in a transformation from aggregation‐caused quenching (ACQ) to aggregation‐induced emission (AIE) effect and a remarkable enhancement of pyrene emission in the solid state. More importantly, an unusual purification of emission is also achieved. Through computational calculation and experimental characterization, finally determined by X‐ray diffraction analysis, we prove that the excellent emissions result from the refined molecular arrangements, including reduced π‐π stacking, well‐ordered packing and enhanced structural stability. This work demonstrates the potential of mechanical bond in the field of organic luminescent molecules, providing a new avenue for developing high‐performance organic luminescent materials and beyond.

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Section: Introductionmentioning

confidence: 99%

Mechanical Bond Induced Enhancement and Purification of Pyrene Emission in the Solid State

Zhang,

Zhou,

Zhang

et al. 2024

Chemistry A European J

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Synergistic Degradation of Durable Polymer Networks by Light and Acid Enabled by Pyrenylsilicon Crosslinks

Kawano,

Masai,

Tsubokawa

et al. 2024

Advanced Materials

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Material photocontrol has gained importance in process engineering and biomedical applications. However, highly photoreactive materials are intrinsically unstable to light, which limits their continuous use in lit environments owing to their gradual deterioration. Herein, synergistically photocontrollable materials in the presence of acid are developed to overcome the conventional trade‐off between their photoreactivity and photostability. Pyrenylsilicon derivatives are designed as synergistically cleavable moieties on C–Si bonds under simultaneous treatment with light and acid through photoinduced dearomatization and protonation to generate the Wheland intermediate, whereas the derivatives are highly stable to light or acid alone. The unique reactivity of pyrenylsilicon derivatives is applied to various polymer network crosslinkers, enabling synergistic control and degradation of materials with light and acids. Because of their high photostability in the absence of acids, these materials can be utilized as optical materials, robust elastomers, and 3D photoprinted gels.

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Exciplex Emission in the POSS Possessing Two Kinds of Luminophores

Narikiyo,

Kato,

Gon

et al. 2024

ChemPhotoChem

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Here we report the synthesis and luminescent properties of the modified polyhedral oligomeric silsesquioxane (POSS) that possesses two types of luminophores, cyanobenzene and N,N‐diethylaniline for inducing significant emission not only from each dye but also from molecular interactions on the POSS core. From the optical measurements in the diluted solution, we observed both locally‐excited emission and excimer emission originating from intramolecular interactions assisted by POSS. Moreover, highly‐efficient exciplex emission was observed from the thin film, indicating that the interaction between luminophores easily occurs in the solid state by accumulating two kinds of molecules in the single POSS molecule. Finally, we also found that the modified POSS showed a unique acid responsiveness which can be caused by protonation at two types of amino moieties. In this manuscript, it is shown that POSS is able to play various roles at the same time: recruiting excited molecules to form exciplexes, suppressing concentration quenching in the solid state, and imparting stimulus responsiveness to exciplexes.

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Luminescent Thermoresponse via Excimer/Exciplex Transition of Pyrene Derivative in Polymer Networks Containing [3]Rotaxane

Cited by 6 publications

References 51 publications

Mechanical Bond Induced Enhancement and Purification of Pyrene Emission in the Solid State

Mechanical Bond Induced Enhancement and Purification of Pyrene Emission in the Solid State

Synergistic Degradation of Durable Polymer Networks by Light and Acid Enabled by Pyrenylsilicon Crosslinks

Exciplex Emission in the POSS Possessing Two Kinds of Luminophores

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