The endeavor of vibration-induced emission (VIE) for dynamic emissions

Zhang, Zhiyun; Sun, Guangchen; Chen, Wei; Su, Jianhua; Tian, He

doi:10.1039/d0sc01591a

Cited by 68 publications

(59 citation statements)

References 122 publications

(164 reference statements)

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“…6 The bent-to-planar excited-state dynamics, which we termed vibration-induced emission (VIE), have introduced new features to the photophysical properties, e.g., large Stokes shifts and multicolor emission. 15,16 These molecules have been widely applied in ratiometric fluorescent probes, stimulus-responsive materials and white organic light-emitting diodes. [17][18][19][20] Studies on these dynamic fluorescent π-systems allow us to further understand the relationship between π-conjugated structures and photophysics and provide possibilities to fabricate new organic functional materials in the future.…”

Section: Introductionmentioning

confidence: 99%

Vibratile Dihydrophenazines with Controllable Luminescence Enabled by Precise Regulation of π-Conjugated Wings

Qiu

Zhang

et al. 2022

CCS Chem

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A series of vibratile π-extended dihydrophenazines (BPs) and tetrahydrodiphenazine (TP) were synthesized via direct C-N coupling reactions. Structural alterations of the fused acene wings lead to diverse intermolecular packing arrangements as well as tuneable photophysical properties. These compounds exhibit intriguing features, including large Stokes shift, multiple emissions and environmental effects. Notably, a dramatic hypsochromic shift in emission is observed when the acene wing is linearly extended from benzene to naphthalene and anthracene. This unusual π-conjugation length-dependent emission is explained by the close correlation between the calculated fluorescence-emitting energy and the π-conjugation length of the acene subunit. In addition, the TP bearing two flexible units exhibits dynamic photophysical properties resembled to those of BPs. Our results reveal a balanced control over π-conjugation and luminescence in vibratile π-systems,

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Section: Introductionmentioning

confidence: 99%

Vibratile Dihydrophenazines with Controllable Luminescence Enabled by Precise Regulation of π-Conjugated Wings

Qiu

Zhang

et al. 2022

CCS Chem

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“…Under Page 2 of 21 CCS Chemistry 3 different external environmental conditions, such as solvent polarity, 34,35 viscosity 36,37 and temperature, 38 VIE molecules display excellent photoluminescence properties with favorable reversibility and controllable regulations. 39,40 Based on this phenomenon, we proposed a distinct strategy involving the exertion of an external stretching force to explore and report the very special and interesting photoluminescent characteristics of VIE molecules in poly(ε-caprolactone) and ethylene vinyl acetate (EVA) polymer systems. As biodegradable polymers, poly(ε-caprolactone) and EVA materials with good extensibility properties have been generally accepted to form homogeneous mixtures with other compounds in the melt and solution.…”

Section: Introductionmentioning

confidence: 99%

Polymer-Stretching Photoluminescent Regulation by Doping a Single Fluorescent Molecule

Jiang

et al. 2022

CCS Chem

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Photoluminescence materials play an inseparable role in the application of polymer systems. However, intrinsic polymer systems have rarely been intuitively interpreted based on photoluminescence regulation. A novel photoluminescence mechanism called vibration-induced emission (VIE) has recently drawn great attention due to its multicolor fluorescence from a single molecular entity. Based on the unique fluorescent properties of VIE molecules, we have doped 9,14-diphenyl-9,14-dihydrodibenzo[a,c]-phenazine (DPAC) and its derivative DPAC-CN in two stretchable polymers, poly(ε-caprolactone) and ethylene vinyl acetate (EVA) copolymer, to explore the important relationship between luminophores and polymer systems. This research focuses on the multicolor photoluminescence of the obtained blend films that resulted from stretching exertions and temperature responses. The successive conformational alterations of VIE molecules endow continuous photoluminescent changes. Meanwhile, the multicolor variations also provide specific visual evidence regarding the amplified tensile stresses and microstructural changes in the polymer. This demonstration therefore provides advantageous insights into the development of functional optical materials.

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“…This mechanism has been attributed to the saddle-like VIE molecules of 9,14-diphenyl-9,14-dihydrodibenzo[a,c]-phenazine and its derivatives with consecutive conformations from bent to planar (28)(29)(30)(31), resulting in appealing multicolor mission (blue and orange red) from a single molecular entity. Under different external environmental conditions, such as solvent polarity (32,33), viscosity (34,35) and temperature (36), VIE molecules display excellent photoluminescence properties with favorable reversibility and controllable regulations (37,38). Based on this phenomenon, we proposed a distinct strategy involving the exertion of an external stretching force to explore and report the very special and interesting photoluminescent characteristics of VIE molecules in poly(εcaprolactone) and ethylene vinyl acetate (EVA) polymer systems.…”

Section: Introductionmentioning

confidence: 99%

Polymer-Stretching-Regulated Microscopic Photoluminescence of Vibration-Induced Emission (VIE) Molecules

Gu¹,

Li²,

Jiang³

et al. 2021

Preprint

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Photoluminescence materials play an inseparable role in the application of polymer systems. However, intrinsic polymer systems have rarely been intuitively interpreted based on photoluminescence regulation. A novel photoluminescence mechanism called vibration-induced emission (VIE) has recently drawn great attention due to its multicolor fluorescence from a single molecular entity. Based on the unique fluorescent properties of VIE molecules, we doped 9,14-diphenyl-9,14-dihydrodibenzo[a,c]-phenazine (DPAC) and its derivative DPAC-CN in two stretchable polymers, <a></a><a>poly(ε-caprolactone)</a> and ethylene vinyl acetate (EVA) copolymer, to explore the important relationship between luminophores and polymer systems. This research focused on the multicolor photoluminescence of the obtained blend films that resulted from stretching exertions and temperature responses. The successive conformational alterations of VIE molecules endowed continuous photoluminescent changes. Meanwhile, the multicolor variations also provided specific visual evidence regarding the amplified tensile stresses and microstructural changes in the polymer. This demonstration will therefore provide advantageous insights into the development of functional optical materials.

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The endeavor of vibration-induced emission (VIE) for dynamic emissions

Abstract: The emission response for vibration-induced emission luminogens is highly sensitive to the encountered steric hindrance during the planarization process such that a tiny structural variation could induce an obvious change in fluorescence.

Cited by 68 publications

References 122 publications

Vibratile Dihydrophenazines with Controllable Luminescence Enabled by Precise Regulation of π-Conjugated Wings

Vibratile Dihydrophenazines with Controllable Luminescence Enabled by Precise Regulation of π-Conjugated Wings

Polymer-Stretching Photoluminescent Regulation by Doping a Single Fluorescent Molecule

Polymer-Stretching-Regulated Microscopic Photoluminescence of Vibration-Induced Emission (VIE) Molecules

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