Insights into Optical Probes Based on Aggregation‐Induced Emission: from Restriction of Intramolecular Motions to Dark State

Huang, Shuai; Ding, Jipeng; Bi, Anyao; Yu, Kunqian; Zeng, Wenbin

doi:10.1002/adom.202100832

Cited by 28 publications

(20 citation statements)

References 55 publications

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“…Therefore, these packing manners offer deep insights into a mechanism for controlling the emission properties in aggregates, which probably leads to different effects on biological imaging and PDT treatment. 21 The fluorescence signal of TTCP-PF 6 (red) overlapped well with that of commercial Mito-Tracker Green (green) with a Pearson correlation coefficient of 0.95, as presented in Fig. 3B.…”

Section: Cell Imagingmentioning

confidence: 55%

“…[17][18][19][20] In addition, the solid-state structure of optical functional materials such as molecular packing and intermolecular interactions is also a dominant factor in dictating the emission properties. [21][22][23] Subtle intermolecular microenvironment 24,25 changes usually induce the formation of different packing motifs composed of H-aggregates and J-aggregates, thus leading to various performances. [26][27][28][29][30] Therefore, ingenious modulation of molecular structures as well as intra/ intermolecular interactions could endow the materials with desired characteristics and provide an ideal arena for understanding some mechanistic issues at a strictly molecular level, such as diverse aggregation-related photophysical processes.…”

Section: Introductionmentioning

confidence: 99%

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Boosting the photodynamic therapy of near-infrared AIE-active photosensitizers by precise manipulation of the molecular structure and aggregate-state packing

et al. 2022

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Section: Cell Imagingmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Boosting the photodynamic therapy of near-infrared AIE-active photosensitizers by precise manipulation of the molecular structure and aggregate-state packing

et al. 2022

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“…On the other hand, since the TICT process generally weakens the emission [29][30][31] and even puts the fluorophore in dark TICT state, [35,36] 6 a had a much weaker emission than 6 b because of more TICT process of 6 a than 6 b in THF. As the water fraction in THF increased, the polarity of the mixed solvent increased, arousing an increase of the TICT emission and a gradual bathochromic shift of 6 a.…”

Section: Resultsmentioning

confidence: 99%

Hindered Tetraphenylethylene Helicates: Chiral Fluorophores with Deep‐Blue Emission, Multiple‐Color CPL, and Chiral Recognition Ability

Zheng

et al. 2021

Angewandte Chemie

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New hindered tetraphenylethylene (TPE) helicates with substitution at 2,6-position of phenyl rings were designed and synthesized. Due to the increased hindrance, the TPE helicates emit strong deep-blue to violet fluorescence both in the solid state and in solution, and could be resolved into enantiomers that emit strong and multicolor circularly polarized luminescence (CPL), and exhibit a high enantioselective recognition of chiral tartaric acid and its derivatives. Surprisingly, the derived helicate tetramines possess amino groups with an unpredented planar structure and sp 2hybridized nitrogen, arousing the change between AIE effect and ACQ phenomenon through photoinduced electron transfer (PET). With advantages of short synthetic route, many modification positions, deep-blue to violet emission, wide CPL tuning, and high chiral recognition ability, the hindered TPE helicates show broad prospects as chiral materials.

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“…Obviously, such a RIMM model provided a new passway for designing AIEgens, neither by restriction of the intramolecular motion nor by restriction of access to the dark state. [15] It will be beneficial for extending the scope of AIEgens from single to multiple component(s).…”

Section: The Study Of Imsp Relation Based On Dynamic Ionic Bondmentioning

confidence: 99%

More is different: activating luminescence in aggregate via restriction of inter-molecular motion

Bian

et al. 2022

Preprint

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Molecular motion is related to the structures and properties of the molecules and their aggregates. Owing to both weak intermolecular interactions and complicated interplay between molecules, the manipulation of inter-molecular motion to realize specific structures and properties as well as applications, is challenging but attractive. Here, we reported that the photoluminescence property of luminogens could be tuned by the manipulation of the inter-molecular motion based on the dynamic ionic bond between the cation of acridinium and the anion of tetraphenyl boron. The free inter-molecular motion and the strong attraction of the ionic bond in the non/less polar solvents enabled the formation of a dark state in the excited state with faint emission. In contrast, multiple ionic bonds between cation and anion together with non-covalent interactions were observed in the crystalline state. This directly contributed to the restriction of the inter-molecular motion (RIMM), and eventually gave rise to bright aggregation-induced emission. Such a RIMM model for efficient solid-state emission can be validated by several organic ionic species. More importantly, this type of “multicomponent luminogens” showed remarkable reactive oxygen species generation, which enabled them to kill bacteria even superbugs upon white-light irradiation. This study not only provided fundamental insights into the molecular motion-structure-property relationship, but also opened up the possibility of constructing highly efficient luminogens in aggregates via RIMM for advanced applications.

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Insights into Optical Probes Based on Aggregation‐Induced Emission: from Restriction of Intramolecular Motions to Dark State

Abstract: Figure 7. 12) optimized geometries of the S 0 , S 1 , and MECI and the XMCQDPT2 computed LIIC pathway between the optimized S1 and MECI geometries of the compound. Reproduced with permission. [45]

Cited by 28 publications

References 55 publications

Boosting the photodynamic therapy of near-infrared AIE-active photosensitizers by precise manipulation of the molecular structure and aggregate-state packing

Boosting the photodynamic therapy of near-infrared AIE-active photosensitizers by precise manipulation of the molecular structure and aggregate-state packing

Hindered Tetraphenylethylene Helicates: Chiral Fluorophores with Deep‐Blue Emission, Multiple‐Color CPL, and Chiral Recognition Ability

More is different: activating luminescence in aggregate via restriction of inter-molecular motion

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