A highly emissive AIE-active luminophore exhibiting deep-red to near-infrared piezochromism and high-quality lasing

Lv, Chunyan; Liu, Wangwang; Luo, Qianxin; Yi, Haiyan; Yu, Hua; Yang, Zhongmin; Zou, Bo; Zhang, Yujian

doi:10.1039/d0sc01095b

Cited by 67 publications

(43 citation statements)

References 54 publications

(2 reference statements)

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“…To suppress the CT and LE(n−π*) transitions and enhance the LE(π−π*) transitions between the S 0 and S 1 states, we have developed a series of highly fluorescent PIs with high Φ values by combining dianhydrides with high electron-accepting ability, whose HOMO-LUMO transitions are LE(π−π*), and alicyclic diamines with low electrondonating ability [15,[20][21][22][23][24][25][26][27][28][29]. With other methods, highly fluorescent fully aromatic PIs have been developed by introducing aggregation-induced emission (AIE)-active bulky moieties, such as modified triarylamine [30,31] or tetraphenylethylene structures [32], in their main or side chains.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of White-Light Luminescent End-Capped Polyimides Based on FRET and Excited State Intramolecular Proton Transfer

et al. 2021

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N-cyclohexylphthalimide-substituted trifluoroacetylamino (CF3CONH-) group (3TfAPI), which forms an intramolecular hydrogen bond, was synthesized, and it exhibited a bright yellow fluorescence owing to the excited-state intramolecular proton transfer (ESIPT) in the solution and crystalline states. In addition, CF3CONH-substituted phthalic anhydride (3TfAPA) was synthesized, which was attached to the termini of a blue-fluorescent semi-aromatic polyimide (PI) chain. Owing to the efficient Förster resonance energy transfer (FRET) occurring from the main chain to the termini and the suppression of deprotonation (anion formation) at the 3TfAPA moiety by H2SO4 doping, the resulting PI films display bright white fluorescence. Moreover, the enhancement of the chain rigidity by substituting the diamine moiety results in an increase in the quantum yield of white fluorescence (Φ) by a factor of 1.7, due to the suppression of local molecular motion. This material design strategy is promising for preparing thermally stable white-light fluorescent PIs applicable to solar spectral convertors, displays, and ICT devices.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of White-Light Luminescent End-Capped Polyimides Based on FRET and Excited State Intramolecular Proton Transfer

et al. 2021

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“…Aside from the complicated π-conjugated structures, [204] the AIE materials with the simple π-conjugated structures may also actualize the efficient laser. Tang et al studied the optical properties of a series of (2-hydroxyphenyl)propanone derivatives with the oversimplified scaffolds.…”

Section: Organic Sslmentioning

confidence: 99%

Aggregation‐induced emission materials for nonlinear optics

Han

et al. 2021

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Aggregation‐induced emission (AIE) is a vital photophysical phenomenon that the luminogens in the concentrated or aggregated cases will engender the dramatically boosted emission in comparison with the dispersive states. Given this extraordinary emitting capacity exactly resolves the aggregation‐caused quenching (ACQ) situations residing in the traditional luminophores, the booming AIE luminogens have drawn tremendous interest owing to their advanced performances and colossal potential applications in various areas. Further exploitations of AIE molecules also drive the research interests in the midst of these AIE materials toward the nonlinear optical (NLO) regime. The combination of AIE and NLO effects have nurtured some unforeseen properties of AIE materials and extended their application spheres. Therefore, some NLO‐active AIE materials have been wielded in many crucial applications, for example, optical limiting, laser, bioimaging, and photodynamic therapy. Meanwhile, the impacts of aggregate on the NLO effect also deserve deep considerations and pursuits, and the modifications of aggregates promise an easy, efficient, and prompt avenue to tune the NLO properties of materials. The recent achievements and progress in the NLO properties of AIE materials have been summarized in this review. The second‐order and third‐order NLOs of the AIE materials have been introduced and their correlative applications have been discussed.

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“…The synthetic method of DBCT was modified by the reported literature (Figure 1a). [22,23] More detailed synthesis and characterization of the final compound are illustrated in (Schemes S1-S3 and Figures S1-S6, Supporting Information). As shown in Figure 1b and Figure S7 (Supporting Information), the obvious color variance of DBCT powder was observed after pressing or grinding along with the fluorescence wavelength variation (Δλ = 60 nm) from orange (O-phase, λ= 586 nm) to deep red (R-phase, λ = 646 nm), which can recover to pristine color (λ = 585 nm) by heating at 120 °C for about 10 s. Especially, an obvious emission enhancement was observed in the pressure range of 1 atm-0.4 MPa and further compression induced the emission decrease (>0.4MPa).…”

Section: Piezochromic Behaviors Of Powdermentioning

confidence: 99%

High Contrast and Bright Emission Piezochromic Fluorescence in Organic Crystals via Pressure Modulated Exciton Coupling Effect

Man

et al. 2021

Advanced Optical Materials

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With its recent debut in various fields, piezochromic fluorescent (PCF) materials have attracted considerable attention due to their unique photophysical features with dynamically reversible emission wavelength and intensity. Herein, a novel luminogen DBCT is developed, which is sensitive to external pressure and displays dual color reversibly switched PCF fluorescence. The solid state emission can switch from bright orange (O) (λem = 586 nm, Φsolid = 0.47) to deep red (R) emission (λem = 646 nm, Φsolid = 0.34) with high contrast through pressing (0.6 MPa), heating and fuming processes. Single crystal X‐ray analysis and theoretical calculations verify that the reversible luminescence switching characteristic is highly related to the different molecular packing mode within O and R crystals, which amplifies the exciton coupling (EC) effect and results in good PCF performances with high Φsolid as well as distinguishable red‐shifted emission. With such multiple advantages that writable fluorescent inks are successfully fabricated with high contrast for security anti‐counterfeiting applications based on DBCT molecules. This research may offer an important guideline for molecular design of PCF materials and enrich the underlying mechanism of mechanochromic luminescence, which also broadens the real‐life applications of smart materials.

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A highly emissive AIE-active luminophore exhibiting deep-red to near-infrared piezochromism and high-quality lasing

Abstract: A HLCT-type luminophore is prepared with bright deep-red fluorescence, showing high-performance piezochromism and lasing.

Cited by 67 publications

References 54 publications

Synthesis and Characterization of White-Light Luminescent End-Capped Polyimides Based on FRET and Excited State Intramolecular Proton Transfer

Synthesis and Characterization of White-Light Luminescent End-Capped Polyimides Based on FRET and Excited State Intramolecular Proton Transfer

Aggregation‐induced emission materials for nonlinear optics

High Contrast and Bright Emission Piezochromic Fluorescence in Organic Crystals via Pressure Modulated Exciton Coupling Effect

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