Reversibly modulating a conformation-adaptive fluorophore in [2]catenane

Yang, Shun; Zhao, Cai-Xin; Crespi, Stefano; Li, Xin; Zhang, Qi; Zhang, Zhiyun; Mei, Ju; Tian, He; Qu, Da‐Hui

doi:10.1016/j.chempr.2021.02.019

Cited by 65 publications

(49 citation statements)

References 56 publications

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“…Fluorescent properties of the 9,14-diphenyl-9,14dihydrodibenzo[a,c]phenazine (DPAC) fluorophore is sensitive to its conformation, which in turn is dependent on the coconformation of the [2]catenane, and therefore switching between stable co-conformations results in a change in the observed fluorescence (Figure 13). 73 The different reactivity of catenane co-conformations has also been developed into switchable catalysts. For example, Willner and co-workers have developed DNA catenanes that can be switched between the catalytically active and inactive states.…”

Section: Stablementioning

confidence: 99%

“…13 ). 73 The different reactivities of catenane co-conformations have also been exploited in the development of switchable catalysts. For example, Willner and co-workers have developed DNA catenanes that can be switched between the catalytically active and inactive states.…”

Section: Properties and Applications Of Catenanesmentioning

confidence: 99%

“…Fig.13Co-conformational switching of an acid-base responsive DPAC-containing [2]catenane with different fluorescence properties 73. …”

mentioning

confidence: 99%

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Distinctive features and challenges in catenane chemistry

Au‐Yeung

Deng

2022

Chem. Sci.

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Section: Stablementioning

confidence: 99%

Section: Properties and Applications Of Catenanesmentioning

confidence: 99%

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Distinctive features and challenges in catenane chemistry

Au‐Yeung

Deng

2022

Chem. Sci.

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“…[1][2][3][4][5][6] Nature's molecular machines like adenosine triphosphatase, flagella bacteria, and translocase can precisely control unidirectional movements with accurate control of propagation, transcription, and translation of the genetic codes. 7,8 Inspired by nature's molecular machines, a variety of artificial molecular machines, i.e., nanocar, 9,10 molecular elevator, 11 molecular walker, 12 molecular brake, 13 synthesizer, 14 molecular actuator, 15 and molecular shuttle 16,17 have been created via dynamic control of the molecular motions, inspiring further potential applications in the fields of chemistry, 18 materials science, 19 and biology. 20 The typical molecular motors based on reversible cis-trans isomerization of double bonds were pioneered by Feringa's group.…”

Section: Introductionmentioning

confidence: 99%

Thermal Energy-Driven Solid-State Molecular Rotation Monitored by Real-Time Emissive Color Switching

Hou

et al. 2022

CCS Chem

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Inspired by nature's molecular machines, the scientific research on solid-state molecular rotors is of great interest yet remains largely unexplored. Here we report a unique example of a thermal energy-driven stimuliresponsive solid-state molecular rotor, which is featuring with an o-carborane moiety as a rotor that directly transduces the surrounding thermal energy into molecular rotations in the crystalline states. Its rotation is confirmed by X-ray diffraction, low-temperature emission, and time-dependent density functional theory (TD-DFT), etc, which are responsible for the dynamic conformation changes in the excited states, leading to the expression of twisted intramolecular charge transfer (TICT) emission. TICT states are further identified by temperature-dependent emissions, which strengthen electronic communications between the electrondonating carbazole unit and the electron-withdrawing o-carborane moiety. As a result, significantly, the molecular rotations of o-carborane-based crystalline and its fluorescence reversible processes can be

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“…[20][21][22][23][24] The DPAC units can perform dynamically vibrative conformation adaption upon light excitation and thus emit multi-color emission dependent on the conformational freedom. [25] Several strategies have been developed to enable the fluorescent tuning and switching of DPAC units, including covalent chemical locking, [21] noncovalent cyclization, [22,26] switchable motion in mechanically interlocked systems, [27] and microenvironmental control in polymer matrix. [28] These efforts have exhibited the versatility and uniqueness of DPAC fluorophores as a candidate for fabricating single-fluorophore multi-color systems.…”

mentioning

confidence: 99%

Dynamic Timing Control over Multicolor Molecular Emission by Temporal Chemical Locking

et al. 2022

Self Cite

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Dynamic control over molecular emission, especially in a time‐dependent manner, holds great promise for the development of smart luminescent materials. Here we report a series of dynamic multicolor fluorescent systems based on the time‐encoded locking and unlocking of individual vibrational emissive units. The intramolecular cyclization reaction driven by adding chemical fuel acts as a chemical lock to decrease the conformational freedom of the emissive units, thus varying the fluorescence wavelength, while the resulting chemically locked state can be automatically unlocked by the hydrolysis reaction with water molecules. The dynamic molecular system can be driven by adding chemical fuels for multiple times. The emission wavelength and lifetime of the locking states can be readily controlled by elaborating the molecular structures, indicating this strategy as a robust and versatile way to modulate multi‐color molecular emission in a time‐encoded manner.

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Reversibly modulating a conformation-adaptive fluorophore in [2]catenane

Cited by 65 publications

References 56 publications

Distinctive features and challenges in catenane chemistry

Distinctive features and challenges in catenane chemistry

Thermal Energy-Driven Solid-State Molecular Rotation Monitored by Real-Time Emissive Color Switching

Dynamic Timing Control over Multicolor Molecular Emission by Temporal Chemical Locking

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