Functionalized cyano-OPVs as melt-processable two-photon absorbers

Makowski, Brian T.; Lott, Joseph; Valle, Brent; Singer, Kenneth D.; Weder, Christoph

doi:10.1039/c2jm15846a

Cited by 16 publications

(7 citation statements)

References 41 publications

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“…1 and 2 for synthetic routes). Considering the self-organization nature of LCs, we synthesized a cyano-substituted oligo(p-phenylene vinylene) derivative DC5 as the fluorescent molecule due to its intense emission in both solution and solid state to avoid aggregation-caused quenching (ACQ) effect [34][35][36][37][38] . The peripheral flexible n-pentyloxy groups (-OC 5 H 11 ) together with central rigid core are designed to mimic the structure of LC molecules, increasing the solubility of DC5 in LC host E7 to prepare homogeneous fluorescent LC mixtures.…”

Section: Resultsmentioning

confidence: 99%

Geminate labels programmed by two-tone microdroplets combining structural and fluorescent color

et al. 2021

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Creating a security label that carries entirely distinct information in reflective and fluorescent states would enhance anti-counterfeiting levels to deter counterfeits ranging from currencies to pharmaceuticals, but has proven extremely challenging. Efforts to tune the reflection color of luminescent materials by modifying inherent chemical structures remain outweighed by substantial trade-offs in fluorescence properties, and vice versa, which destroys the information integrity of labels in either reflection or fluorescent color. Here, a strategy is reported to design geminate labels by programming fluorescent cholesteric liquid crystal microdroplets (two-tone inks), where the luminescent material is ‘coated’ with the structural color from helical superstructures. These structurally defined microdroplets fabricated by a capillary microfluidic technique contribute to different but intact messages of both reflective and fluorescent patterns in the geminate labels. Such two-tone inks have enormous potential to provide a platform for encryption and protection of valuable authentic information in anti-counterfeiting technology.

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Section: Resultsmentioning

confidence: 99%

Geminate labels programmed by two-tone microdroplets combining structural and fluorescent color

et al. 2021

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“…[4f], In particular, their rigid nature supports the formation of ordered assembled structures. Moreover, the extended π‐conjugated system leads to various functions such as charge carrier transport, nonlinear optical responses, and luminescence . Therefore, the resulting molecular assemblies are promising candidates for materials used in electronic devices including light‐emitting diodes, photovoltaic devices and field‐effect transistors .…”

Section: Introductionmentioning

confidence: 99%

Mechanoresponsive Luminescent Molecular Assemblies: An Emerging Class of Materials

et al. 2015

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Abstract:The possibility to change the morphology of organic and organometallic materials through mechanical stimulation is emerging as a general and powerful concept for the design of functional materials. In particular the photophysical properties, such as photoluminescence color, quantum yield and emission lifetime of organic and organometallic fluorophores can significantly depend on the molecular packing, enabling the development of molecular materials with mechanoresponsive luminescence characteristics. Indeed, an increasing number of studies have shown in recent years that mechanical force can be utilized to change the molecular arrangement, and thereby the optical response, of luminescent molecular assemblies of π-conjugated organic or organometallic molecules. This report reviews the development of such mechanoresponsive luminescent (MRL) molecular assemblies consisting of organic or organometallic molecules and summarizes emerging trends in this research field.After a brief introduction of mechanoresponsive luminescence observed in molecular assemblies, the concept of "luminescent molecular domino" is introduced, before molecular materials that show turn-on/off of photoluminescence in response to mechanical stimulation are reviewed. Mechanically stimulated multi-color changes and water-soluble MRL materials are also highlighted and approaches that combine the concept of MRL molecular assemblies with other materials types are presented in the last part of this progress report.

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“…Phenylenevinylene (PV) derivatives are among of the most widely investigated DR/NIR fluorogens. Many oligo or polyphenylenevinylenes (PPVs) have been reported in the literature as emitting layers in OLEDs and PLEDs [ 20 , 21 , 22 , 23 , 24 , 25 ]. Monomeric and polymeric systems based on PV scaffolds are simple and cheap to realize, processable and easily chemically tuned to give colors in the whole range of the visible spectrum.…”

Section: Introductionmentioning

confidence: 99%

Solid-State Highly Efficient DR Mono and Poly-dicyano-phenylenevinylene Fluorophores

et al. 2018

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An efficient deep red (DR)-emitting organic solid based on a dicyano-phenylenevinylene derivative was reported. The structural and spectroscopic properties of the solid have been described in terms of crystallographic data and time-dependent DFT analysis. A noteworthy fluorescence quantum yield of 53% was observed for the brightest emitter cast into solid films. This result can be explained in terms of the aggregation-induced emission (AIE) effect.

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Functionalized cyano-OPVs as melt-processable two-photon absorbers

Cited by 16 publications

References 41 publications

Geminate labels programmed by two-tone microdroplets combining structural and fluorescent color

Geminate labels programmed by two-tone microdroplets combining structural and fluorescent color

Mechanoresponsive Luminescent Molecular Assemblies: An Emerging Class of Materials

Solid-State Highly Efficient DR Mono and Poly-dicyano-phenylenevinylene Fluorophores

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